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Díaz-Coello S, Winkler D, Griesser C, Moser T, Rodríguez JL, Kunze-Liebhäuser J, García G, Pastor E. Highly Active W 2C-Based Composites for the HER in Alkaline Solution: the Role of Surface Oxide Species. ACS Appl Mater Interfaces 2024. [PMID: 38648335 DOI: 10.1021/acsami.4c01612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The hydrogen evolution reaction (HER) is a crucial electrochemical process for the proposed hydrogen economy since it has the potential to provide pure hydrogen for fuel cells. Nowadays, hydrogen electroproduction is considerably expensive, so promoting the development of new non-noble catalysts for the cathode of alkaline electrolyzers appears as a suitable way to reduce the costs of this technology. In this sense, a series of tungsten-based carbide materials have been synthesized by the urea-glass route as candidates to improve the HER in alkaline media. Moreover, two different pyridinium-based ionic liquids were employed to modify the surface of the carbide grains and control the amount and nature of their surface species. The main results indicate that the catalyst surface composition is modified in the hybrid materials, which are then distinguished by the appearance of tungsten suboxide structures. This implies the action of ionic liquids as reducing agents. Consequently, differential electrochemical mass spectrometry (DEMS) is used to precisely determine the onset potentials and rate-determining steps (RDS) for the HER in alkaline media. Remarkably, the modified surfaces show high catalytic performance (overpotentials between 45 and 60 mV) and RDS changes from Heyrovsky-Volmer to Heyrovsky as the surface oxide structures get reduced. H2O molecule reduction is then faster at tungsten suboxide, which allows the formation of the adsorbed hydrogen at the surface, boosting the catalytic activity and the kinetics of the alkaline HER.
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Affiliation(s)
- S Díaz-Coello
- Institute of Materials and Nanotechnology, Department of Chemistry, University of La Laguna, PO Box 456, 38200 La Laguna, Santa Cruz de Tenerife, Spain
- Department of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck 6020, Austria
| | - D Winkler
- Department of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck 6020, Austria
| | - C Griesser
- Department of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck 6020, Austria
| | - T Moser
- Department of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck 6020, Austria
| | - J L Rodríguez
- Institute of Materials and Nanotechnology, Department of Chemistry, University of La Laguna, PO Box 456, 38200 La Laguna, Santa Cruz de Tenerife, Spain
| | - J Kunze-Liebhäuser
- Department of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck 6020, Austria
| | - G García
- Institute of Materials and Nanotechnology, Department of Chemistry, University of La Laguna, PO Box 456, 38200 La Laguna, Santa Cruz de Tenerife, Spain
| | - E Pastor
- Institute of Materials and Nanotechnology, Department of Chemistry, University of La Laguna, PO Box 456, 38200 La Laguna, Santa Cruz de Tenerife, Spain
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Pastor E, Lian Z, Xia L, Ecija D, Galán-Mascarós JR, Barja S, Giménez S, Arbiol J, López N, García de Arquer FP. Complementary probes for the electrochemical interface. Nat Rev Chem 2024; 8:159-178. [PMID: 38388837 DOI: 10.1038/s41570-024-00575-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/09/2024] [Indexed: 02/24/2024]
Abstract
The functions of electrochemical energy conversion and storage devices rely on the dynamic junction between a solid and a fluid: the electrochemical interface (EI). Many experimental techniques have been developed to probe the EI, but they provide only a partial picture. Building a full mechanistic understanding requires combining multiple probes, either successively or simultaneously. However, such combinations lead to important technical and theoretical challenges. In this Review, we focus on complementary optoelectronic probes and modelling to address the EI across different timescales and spatial scales - including mapping surface reconstruction, reactants and reaction modulators during operation. We discuss how combining these probes can facilitate a predictive design of the EI when closely integrated with theory.
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Affiliation(s)
- Ernest Pastor
- CNRS, IPR (Institut de Physique de Rennes), University of Rennes, Rennes, France.
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL2015, The University of Tokyo, Tokyo, Japan.
| | - Zan Lian
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Tarragona, Spain
| | - Lu Xia
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - David Ecija
- IMDEA Nanoscience, Campus Universitario de Cantoblanco, Madrid, Spain
| | - José Ramón Galán-Mascarós
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Tarragona, Spain
- ICREA, Barcelona, Spain
| | - Sara Barja
- Department of Polymers and Advanced Materials, Centro de Física de Materiales (CFM), University of the Basque Country UPV/EHU, San Sebastián, Spain
- Donostia International Physics Center (DIPC), San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Sixto Giménez
- Institute of Advanced Materials (INAM) Universitat Jaume I, Castelló, Spain
| | - Jordi Arbiol
- ICREA, Barcelona, Spain
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, Catalonia, Spain
| | - Núria López
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Tarragona, Spain
| | - F Pelayo García de Arquer
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona, Spain.
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3
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Blanco N, Oliva I, Tejedor P, Pastor E, Alvarellos A, Pastor C, Baixauli J, Arredondo J. ILEOSTIM trial: a study protocol to evaluate the effectiveness of efferent loop stimulation before ileostomy reversal. Tech Coloproctol 2023; 27:1251-1256. [PMID: 37106220 PMCID: PMC10638139 DOI: 10.1007/s10151-023-02807-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023]
Abstract
PURPOSE A protective loop ileostomy is the most useful method to reduce sequelae in the event of an anastomotic leakage (AL) after rectal cancer surgery. However, it requires an additional stoma reversal surgery with its own potential complications. Postoperative ileus (POI) remains the most common complication after ileostomy reversal, which leads to an increase in morbidity, length of hospital stay (LOS) and overall healthcare costs. Several retrospective studies carried out in this field have concluded that there are insufficient evidence-based recommendations about the routine application of preoperative bowel stimulation in clinical practice. Here we discuss whether stimulation of the efferent limb before ileostomy reversal might reduce POI and improve postoperative outcomes. METHODS This is a multicentre randomised controlled trial to determine whether mechanical stimulation of the efferent limb during the 2 weeks before the ileostomy reversal would help to reduce the development of POI after surgery. This study was registered on Clinicaltrials.gov (NCT05302557). Stimulation will consist of infusing a solution of 500 ml of saline chloride solution mixed with a thickening agent (Resource©, Nestlé Health Science; 6.4 g sachet) into the distal limb of the ileostomy loop. This will be performed within the 2 weeks before ileostomy reversal, in an outpatient clinic under the supervision of a trained stoma nurse. CONCLUSION The results of this study could provide some insights into the preoperative management of these patients.
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Affiliation(s)
- N Blanco
- Department of General Surgery, Clínica Universidad de Navarra, Av. Pío XII 36, 31008, Pamplona, Navarra, Spain
| | - I Oliva
- Department of General Surgery, University Hospital of León, León, Spain
| | - P Tejedor
- Department of General Surgery, University Hospital Gregorio Marañón, Madrid, Spain
| | - E Pastor
- Department of General Surgery, University Hospital of León, León, Spain
| | - A Alvarellos
- Department of General Surgery, Clínica Universidad de Navarra, Madrid, Spain
| | - C Pastor
- Department of General Surgery, Clínica Universidad de Navarra, Madrid, Spain
| | - J Baixauli
- Department of General Surgery, Clínica Universidad de Navarra, Av. Pío XII 36, 31008, Pamplona, Navarra, Spain
| | - J Arredondo
- Department of General Surgery, Clínica Universidad de Navarra, Av. Pío XII 36, 31008, Pamplona, Navarra, Spain.
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Nomellini C, Polo A, Mesa CA, Pastor E, Marra G, Grigioni I, Dozzi MV, Giménez S, Selli E. Improved Photoelectrochemical Performance of WO 3/BiVO 4 Heterojunction Photoanodes via WO 3 Nanostructuring. ACS Appl Mater Interfaces 2023; 15. [PMID: 37921705 PMCID: PMC10658457 DOI: 10.1021/acsami.3c10869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/29/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023]
Abstract
WO3/BiVO4 heterojunction photoanodes can be efficiently employed in photoelectrochemical (PEC) cells for the conversion of water into molecular oxygen, the kinetic bottleneck of water splitting. Composite WO3/BiVO4 photoelectrodes possessing a nanoflake-like morphology have been synthesized through a multistep process and their PEC performance was investigated in comparison to that of WO3/BiVO4 photoelectrodes displaying a planar surface morphology and similar absorption properties and thickness. PEC tests, also in the presence of a sacrificial hole scavenger, electrochemical impedance analysis under simulated solar irradiation, and incident photon to current efficiency measurements highlighted that charge transport and charge recombination issues affecting the performance of the planar composite can be successfully overcome by nanostructuring the WO3 underlayer in nanoflake-like WO3/BiVO4 heterojunction electrodes.
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Affiliation(s)
- Chiara Nomellini
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Annalisa Polo
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Camilo A. Mesa
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
| | - Ernest Pastor
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
- IPR−Institut
de Physique de Rennes, CNRS, UMR 6251 Université de Rennes, 35000 Rennes, France
| | - Gianluigi Marra
- Eni
S.p.A Novara Laboratories (NOLAB) Renewable, New Energies and Material
Science Research Center (DE-R&D) Via G. Fauser 4, I-28100 Novara, Italy
| | - Ivan Grigioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Maria Vittoria Dozzi
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Sixto Giménez
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
| | - Elena Selli
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
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5
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Meng Z, Pastor E, Selim S, Ning H, Maimaris M, Kafizas A, Durrant JR, Bakulin AA. Operando IR Optical Control of Localized Charge Carriers in BiVO 4 Photoanodes. J Am Chem Soc 2023; 145:17700-17709. [PMID: 37527512 PMCID: PMC10436276 DOI: 10.1021/jacs.3c04287] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Indexed: 08/03/2023]
Abstract
In photoelectrochemical cells (PECs) the photon-to-current conversion efficiency is often governed by carrier transport. Most metal oxides used in PECs exhibit thermally activated transport due to charge localization via the formation of polarons or the interaction with defects. This impacts catalysis by restricting the charge accumulation and extraction. To overcome this transport bottleneck nanostructuring, selective doping and photothermal treatments have been employed. Here we demonstrate an alternative approach capable of directly activating localized carriers in bismuth vanadate (BiVO4). We show that IR photons can optically excite localized charges, modulate their kinetics, and enhance the PEC current. Moreover, we track carriers bound to oxygen vacancies and expose their ∼10 ns charge localization, followed by ∼60 μs transport-assisted trapping. Critically, we demonstrate that localization is strongly dependent on the electric field within the device. While optical modulation has still a limited impact on overall PEC performance, we argue it offers a path to control devices on demand and uncover defect-related photophysics.
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Affiliation(s)
- Zhu Meng
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
| | - Ernest Pastor
- IPR−Institut
de Physique de Rennes, CNRS-Centre National
de la Recherche Scientifique, UMR 6251 Université de Rennes, 35000 Rennes, France
| | - Shababa Selim
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
| | - Haoqing Ning
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
| | - Marios Maimaris
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
| | - Andreas Kafizas
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
- London
Centre for Nanotechnology, Imperial College
London, London SW7 2BP, United Kingdom
| | - James R. Durrant
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
| | - Artem A. Bakulin
- Department
of Chemistry and Centre for Processible Electronics, Imperial College London, London W12 0BZ, United
Kingdom
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6
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Johnson AS, Moreno-Mencía D, Amuah EB, Menghini M, Locquet JP, Giannetti C, Pastor E, Wall SE. Ultrafast Loss of Lattice Coherence in the Light-Induced Structural Phase Transition of V_{2}O_{3}. Phys Rev Lett 2022; 129:255701. [PMID: 36608247 DOI: 10.1103/physrevlett.129.255701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 10/16/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
In solids, the response of the lattice to photoexcitation is often described by the inertial evolution on an impulsively modified potential energy surface which leads to coherent motion. However, it remains unknown if vibrational coherence is sustained through a phase transition, during which coupling between modes can be strong and may lead to rapid loss of coherence. Here we use coherent phonon spectroscopy to track lattice coherence in the structural phase transition of V_{2}O_{3}. In both the low and high symmetry phases unique coherent phonon modes are generated at low fluence. However, coherence is lost when driving between the low and high symmetry phases. Our results suggest strongly damped noninertial dynamics dominate during the phase transition due to disorder and multimode coupling.
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Affiliation(s)
- A S Johnson
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss 3, 08860 Castelldefels, Barcelona, Spain
| | - D Moreno-Mencía
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss 3, 08860 Castelldefels, Barcelona, Spain
| | - E B Amuah
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss 3, 08860 Castelldefels, Barcelona, Spain
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark
| | - M Menghini
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
- IMDEA Nanociencia, C/ Faraday 9, 28049 Madrid, Spain
| | - J-P Locquet
- Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - C Giannetti
- Department of Mathematics and Physics, Università Cattolica, I-25121 Brescia, Italy
- Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP), Università Cattolica, I-25121 Brescia, Italy
| | - E Pastor
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss 3, 08860 Castelldefels, Barcelona, Spain
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain
| | - S E Wall
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss 3, 08860 Castelldefels, Barcelona, Spain
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark
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Matamoros V, Casas ME, Pastor E, Tadić Đ, Cañameras N, Carazo N, Bayona JM. Effects of tetracycline, sulfonamide, fluoroquinolone, and lincosamide load in pig slurry on lettuce: Agricultural and human health implications. Environ Res 2022; 215:114237. [PMID: 36084673 DOI: 10.1016/j.envres.2022.114237] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 06/15/2023]
Abstract
The application of pig slurry as fertilizer in agriculture provides nutrients, but it can also contain veterinary medicines, including antibiotic residues (ABs), which can have an ecotoxicological impact on agroecosystems. Furthermore, uptake, translocation, and accumulation of ABs in crops can mobilize them throughout the food chain. This greenhouse study aims to assess AB uptake from soil fertilized with pig slurry and its phenotypical effects on Lactuca sativa L. The plants were cropped in loamy clay soil dosed at 140 kg total N/ha and containing antibiotics (lincomycin, sulfadiazine, oxytetracycline, and enrofloxacin) at different concentration levels (0, 0.05, 0.5, 5, 50, and 500 mg/kg fresh weight, fw). Whereas sulfadiazine (11.8 ng/g fw) was detected in lettuce leaves at the intermediate doses (0.5 mg/kg), lincomycin and its transformation products (hydroxy/sulfate) were only detected at the 50 mg/kg fw dose. In addition, increased AB doses in the pig slurry resulted in decreased lettuce fresh weight and lipid and carbohydrate content and became lethal to lettuce at the highest AB concentrations (500 mg/kg fw). Nevertheless, even at higher doses, the AB content in lettuce following pig-slurry fertilization did not pose any direct significant human health risk (total hazard quotient<0.01). However, the promotion of antimicrobial resistance in humans due to the intake of these vegetables cannot be ruled out.
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Affiliation(s)
- V Matamoros
- Department of Environmental Chemistry, IDAEA-CSIC, C/Jordi Girona, 18-26, E-08034, Barcelona, Spain.
| | - M Escolà Casas
- Department of Environmental Chemistry, IDAEA-CSIC, C/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - E Pastor
- Department of Environmental Chemistry, IDAEA-CSIC, C/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Đ Tadić
- Department of Environmental Chemistry, IDAEA-CSIC, C/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - N Cañameras
- Department of Agri-Food Engineering and Biotechnology DEAB-UPC, Esteve Terrades 8, Building 4, Castelldefels, Spain
| | - N Carazo
- Department of Agri-Food Engineering and Biotechnology DEAB-UPC, Esteve Terrades 8, Building 4, Castelldefels, Spain
| | - J M Bayona
- Department of Environmental Chemistry, IDAEA-CSIC, C/Jordi Girona, 18-26, E-08034, Barcelona, Spain
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Pastor E, Montañés L, Gutiérrez-Blanco A, Hegner FS, Mesa CA, López N, Giménez S. The role of crystal facets and disorder on photo-electrosynthesis. Nanoscale 2022; 14:15596-15606. [PMID: 36148901 DOI: 10.1039/d2nr03609f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Photoelectrochemistry has the potential to play a crucial role in the storage of solar energy and the realisation of a circular economy. From a chemical viewpoint, achieving high conversion efficiencies requires subtle control of the catalyst surface and its interaction with the electrolyte. Traditionally, such control has been hard to achieve in the complex multinary oxides used in PEC devices and consequently the mechanisms by which surface exposed facets influence light-driven catalysts are poorly understood. Yet, this understanding is critical to further improve conversion yields and fine-tune reaction selectivities. Here, we review the impact that crystal facets and disorder have on photoelectrochemical reactivity. In particular, we discuss how the crystal orientation influences the energetics of the surface, the existence of defects and the transport of reactive charges, ultimately dictating the PEC activity. Moreover, we evaluate how facet stability dictates the tendency of the solid to undergo reconstructions during catalytic processes and highlight the experimental and computational challenges that must be overcome to characterise the role of the exposed facets and disorder in catalytic performance.
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Affiliation(s)
- Ernest Pastor
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain.
| | - Laura Montañés
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain.
| | - Ana Gutiérrez-Blanco
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain.
| | - Franziska S Hegner
- Technical University of Munich, Department of Physics, James-Franck-Str. 1, 85748 Garching, Germany
| | - Camilo A Mesa
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain.
| | - Núria López
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain.
| | - Sixto Giménez
- Institute of Advanced Materials (INAM), Universitat Jaume I, Avenida de Vicent Sos Baynat, s/n 12006, Castelló, Spain.
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Martinez-Garcia MA, Oscullo G, Ponce S, Pastor E, Orosa B, Catalán P, Martinez A, Hernandez L, Muriel A, Chiner E, Vigil L, Carmona C, Mayos M, Garcia-Ortega A, Gomez-Olivas JD, Beauperthuy T, Bekki A, Gozal D. Effect of continuous positive airway pressure in very elderly with moderate-to-severe obstructive sleep apnea pooled results from two multicenter randomized controlled trials. Sleep Med 2021; 89:71-77. [PMID: 34915264 DOI: 10.1016/j.sleep.2021.11.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/31/2021] [Accepted: 11/17/2021] [Indexed: 10/19/2022]
Abstract
STUDY OBJECTIVE There is very limited information about the effect of continuous positive airway pressure (CPAP) in the very elderly. Here we aimed to analysed the effect of CPAP on a clinical cohort of patients with obstructive sleep apnea (OSA) ≥80 years old. METHODS Post-hoc pooled analysis of two open-label, multicenter clinical trials aimed to determine the effect of CPAP in a consecutive clinical cohort of elderly (≥70 years old) with moderate-to-severe OSA (apnea-hipopnea index ≥15 events/hour) randomized to receive CPAP or no CPAP for three months. Those consecutive patients ≥80 years old were included in the study. The primary endpoint was the change in Epworth Sleepiness scale (ESS). Secondary outcomes included sleep-related symptoms, quality of life, neurocognitive and mood status as well as office blood pressure measurements. RESULTS From the initial 369 randomized individuals with ≥70 years, 97 (26.3%) with ≥80 years old were included (47 in the CPAP group and 50 in the no-CPAP group). The mean (SD) age was 81.5 (2.4) years. Average use of CPAP was 4.3 (2.6) hours/night (53% with good adherence) Patients in the CPAP group significantly improved snoring and witnessed apneas as well as AHI (from 41.9 to 4.9 events/hour). However no clinical improvements were seen in ESS (-1.2 points, 95%CI, 0.2 to -2.6), any domain of QSQ, any neurocognitive test, OSA-related symptoms, depression/anxiety or blood pressure levels. CONCLUSIONS The present study does not support the use of CPAP in very elderly patients with moderate-to-severe OSA.
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Affiliation(s)
- M A Martinez-Garcia
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain; CIBER Enfermedades Respiratorias (CIBERES), Madrid, Spain.
| | - G Oscullo
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - S Ponce
- Pneumology Department, Hospital Universitario Dr Peset, Valencia, Spain
| | - E Pastor
- Pneumology Department, Hospital Universitario San Juan, Alicante, Spain
| | - B Orosa
- Pneumology Department, Hospital Universitario Dr Peset, Valencia, Spain
| | - P Catalán
- Internal Medicine Department, Hospital General de Requena, Valencia, Spain
| | - A Martinez
- Pneumology Department, Hospital General Universitario de Castellón, Spain
| | - L Hernandez
- Pneumology Department, Hospital General Universitario de Alicante, Valencia, Spain
| | - A Muriel
- Clinical Biostatistics Unit, Hospital Universitario Ramón y Cajal, IRYCIS, CIBERESP, Nursing Department, Alcala University, Madrid, Spain
| | - E Chiner
- Pneumology Department, Hospital Universitario San Juan, Alicante, Spain
| | - L Vigil
- Pneumology Department, Hospital de Sabadell, Corporació Sanitaria Parc Tauli, Barcelona, Spain
| | - C Carmona
- Pneumology Department, Hospital Universitario Virgen Del Rocio, Sevilla, Spain
| | - M Mayos
- Pneumology Department, Hospital Universitario Santa Creu i Sant Pau, Barcelona, Spain
| | - A Garcia-Ortega
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - J D Gomez-Olivas
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - T Beauperthuy
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - A Bekki
- Pneumology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - D Gozal
- University of Missouri School of Medicine, Department of Child Health, Columbia, MO, USA
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10
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Vargas A, Costa D, Macias M, Royo P, Pastor E, Luchkov M, Neumaier S, Stöhlker U, Luff R. Comparison of airborne radiation detectors carried by rotary-wing unmanned aerial systems. RADIAT MEAS 2021. [DOI: 10.1016/j.radmeas.2021.106595] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Francàs L, Selim S, Corby S, Lee D, Mesa CA, Pastor E, Choi KS, Durrant JR. Water oxidation kinetics of nanoporous BiVO 4 photoanodes functionalised with nickel/iron oxyhydroxide electrocatalysts. Chem Sci 2021; 12:7442-7452. [PMID: 34163834 PMCID: PMC8171343 DOI: 10.1039/d0sc06429g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In this work, spectroelectrochemical techniques are employed to analyse the catalytic water oxidation performance of a series of three nickel/iron oxyhydroxide electrocatalysts deposited on FTO and BiVO4, at neutral pH. Similar electrochemical water oxidation performance is observed for each of the FeOOH, Ni(Fe)OOH and FeOOHNiOOH electrocatalysts studied, which is found to result from a balance between degree of charge accumulation and rate of water oxidation. Once added onto BiVO4 photoanodes, a large enhancement in the water oxidation photoelectrochemical performance is observed in comparison to the un-modified BiVO4. To understand the origin of this enhancement, the films were evaluated through time-resolved optical spectroscopic techniques, allowing comparisons between electrochemical and photoelectrochemical water oxidation. For all three catalysts, fast hole transfer from BiVO4 to the catalyst is observed in the transient absorption data. Using operando photoinduced absorption measurements, we find that water oxidation is driven by oxidised states within the catalyst layer, following hole transfer from BiVO4. This charge transfer is correlated with a suppression of recombination losses which result in remarkably enhanced water oxidation performance relative to un-modified BiVO4. Moreover, despite similar electrocatalytic behaviour of all three electrocatalysts, we show that variations in water oxidation performance observed among the BiVO4/MOOH photoanodes stem from differences in photoelectrochemical and electrochemical charge accumulation in the catalyst layers. Under illumination, the amount of accumulated charge in the catalyst is driven by the injection of photogenerated holes from BiVO4, which is further affected by the recombination loss at the BiVO4/MOOH interface, and thus leads to deviations from their behaviour as standalone electrocatalysts. Elucidating the role of charge accumulation and reaction kinetics in governing the performance of Ni/Fe oxyhydroxides as electrocatalysts and as co-catalysts on BiVO4 photoanodes water oxidation.![]()
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Affiliation(s)
- Laia Francàs
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Shababa Selim
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Sacha Corby
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Dongho Lee
- Department of Chemistry, University of Wisconsin-Madison Madison Wisconsin 53706 USA
| | - Camilo A Mesa
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Ernest Pastor
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Kyoung-Shin Choi
- Department of Chemistry, University of Wisconsin-Madison Madison Wisconsin 53706 USA
| | - James R Durrant
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
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12
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Díaz-Coello S, Palenzuela J, Afonso M, Pastor E, García G. WC modified with ionic liquids for the hydrogen evolution reaction in alkaline solution. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114878] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Francàs L, Corby S, Selim S, Lee D, Mesa CA, Godin R, Pastor E, Stephens IEL, Choi KS, Durrant JR. Publisher Correction: Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts. Nat Commun 2020; 11:410. [PMID: 31949162 PMCID: PMC6965187 DOI: 10.1038/s41467-020-14297-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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14
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Rivera-Gavidia L, Fernández de la Puente I, Hernández-Rodríguez M, Celorrio V, Sebastián D, Lázaro M, Pastor E, García G. Bi-functional carbon-based catalysts for unitized regenerative fuel cells. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Rivera-Gavidia L, Luis-Sunga M, Bousa M, Vales V, Kalbac M, Arévalo M, Pastor E, García G. S- and N-doped graphene-based catalysts for the oxygen evolution reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135975] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Selim S, Pastor E, García-Tecedor M, Morris MR, Francàs L, Sachs M, Moss B, Corby S, Mesa CA, Gimenez S, Kafizas A, Bakulin AA, Durrant JR. Impact of Oxygen Vacancy Occupancy on Charge Carrier Dynamics in BiVO4 Photoanodes. J Am Chem Soc 2019; 141:18791-18798. [DOI: 10.1021/jacs.9b09056] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shababa Selim
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Ernest Pastor
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | | | - Madeleine R. Morris
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Laia Francàs
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Michael Sachs
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Benjamin Moss
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Sacha Corby
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Camilo A. Mesa
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - Sixto Gimenez
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain
| | - Andreas Kafizas
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
- The Grantham Institute, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Artem A. Bakulin
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
| | - James R. Durrant
- Department of Chemistry and Centre for Plastic Electronics, MSRH, White City Campus, Imperial College London, London W12 0BZ, United Kingdom
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17
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Mesa CA, Francàs L, Yang KR, Garrido-Barros P, Pastor E, Ma Y, Kafizas A, Rosser TE, Mayer MT, Reisner E, Grätzel M, Batista VS, Durrant JR. Multihole water oxidation catalysis on haematite photoanodes revealed by operando spectroelectrochemistry and DFT. Nat Chem 2019; 12:82-89. [DOI: 10.1038/s41557-019-0347-1] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 09/03/2019] [Indexed: 11/09/2022]
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18
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Corby S, Pastor E, Dong Y, Zheng X, Francàs L, Sachs M, Selim S, Kafizas A, Bakulin AA, Durrant JR. Charge Separation, Band-Bending, and Recombination in WO 3 Photoanodes. J Phys Chem Lett 2019; 10:5395-5401. [PMID: 31416313 DOI: 10.1021/acs.jpclett.9b01935] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In metal oxide-based photoelectrochemical devices, the spatial separation of photogenerated electrons and holes is typically attributed to band-bending at the oxide/electrolyte interface. However, direct evidence of such band-bending impacting upon charge carrier lifetimes has been very limited to date. Herein we use ultrafast spectroscopy to track the rapid relaxation of holes in the space-charge layer and their recombination with trapped electrons in WO3 photoanodes. We observe that applied bias can significantly increase carrier lifetimes on all time scales from picoseconds to seconds and attribute this to enhanced band-bending correlated with changes in oxygen vacancy state occupancy. We show that analogous enhancements in carrier lifetimes can be obtained by changes in electrolyte composition, even in the absence of applied bias, highlighting routes to improve photoconversion yields/performance, through changes in band-bending. This study thus demonstrates the direct connection between carrier lifetime enhancement, increased band-bending, and oxygen vacancy defect state occupancy.
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Affiliation(s)
- Sacha Corby
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Ernest Pastor
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Yifan Dong
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Xijia Zheng
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Laia Francàs
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Michael Sachs
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Shababa Selim
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - Andreas Kafizas
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
- Grantham Institute for Climate Change , Imperial College London , South Kensington , London SW7 2AZ , United Kingdom
| | - Artem A Bakulin
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
| | - James R Durrant
- Department of Chemistry and Centre for Plastic Electronics , Imperial College London , White City Campus, London W12 0BZ , United Kingdom
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19
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Pastor E, Park JS, Steier L, Kim S, Grätzel M, Durrant JR, Walsh A, Bakulin AA. In situ observation of picosecond polaron self-localisation in α-Fe 2O 3 photoelectrochemical cells. Nat Commun 2019; 10:3962. [PMID: 31481691 PMCID: PMC6722133 DOI: 10.1038/s41467-019-11767-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 07/30/2019] [Indexed: 11/09/2022] Open
Abstract
Hematite (α-Fe2O3) is the most studied artificial oxygen-evolving photo-anode and yet its efficiency limitations and their origin remain unknown. A sub-picosecond reorganisation of the hematite structure has been proposed as the mechanism which dictates carrier lifetimes, energetics and the ultimate conversion yields. However, the importance of this reorganisation for actual device performance is unclear. Here we report an in situ observation of charge carrier self-localisation in a hematite device, and demonstrate that this process affects recombination losses in photoelectrochemical cells. We apply an ultrafast, device-based optical-control method to resolve the subpicosecond formation of small polarons and estimate their reorganisation energy to be ~0.5 eV. Coherent oscillations in the photocurrent signals indicate that polaron formation may be coupled to specific phonon modes (<100 cm-1). Our results bring together spectroscopic and device characterisation approaches to reveal new photophysics of broadly-studied hematite devices.
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Affiliation(s)
- Ernest Pastor
- Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
| | - Ji-Sang Park
- Department of Materials, Imperial College London, London, SW7 2AZ, UK
| | - Ludmilla Steier
- Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London, SW7 2AZ, UK
| | - Sunghyun Kim
- Department of Materials, Imperial College London, London, SW7 2AZ, UK
| | - Michael Grätzel
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, Station 6, CH-1015, Lausanne, Switzerland
| | - James R Durrant
- Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London, SW7 2AZ, UK
| | - Aron Walsh
- Department of Materials, Imperial College London, London, SW7 2AZ, UK.,Deparment of Material Science and Engineering, Yonsei University, Seoul, 03722, Korea
| | - Artem A Bakulin
- Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London, SW7 2AZ, UK
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20
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Sachs M, Park JS, Pastor E, Kafizas A, Wilson AA, Francàs L, Gul S, Ling M, Blackman C, Yano J, Walsh A, Durrant JR. Effect of oxygen deficiency on the excited state kinetics of WO 3 and implications for photocatalysis. Chem Sci 2019; 10:5667-5677. [PMID: 31293751 PMCID: PMC6563783 DOI: 10.1039/c9sc00693a] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/12/2019] [Indexed: 01/01/2023] Open
Abstract
Using WO3 as a model material, we investigate how different oxygen vacancy concentrations affect trapping of photogenerated charges and photocatalytic reactions in metal oxides.
Oxygen vacancies are widely used to tune the light absorption of semiconducting metal oxides, but a photophysical framework describing the impact of such point defects on the dynamics of photogenerated charges, and ultimately on catalysis, is still missing. We herein use WO3 as a model material and investigate the impact of significantly different degrees of oxygen deficiency on its excited state kinetics. For highly oxygen-deficient films, photoelectron spectroscopy shows an over 2 eV broad distribution of oxygen vacancy states within the bandgap which gives rise to extended visible light absorption. We examine the nature of this distribution using first-principles defect calculations and find that defects aggregate to form clusters rather than isolated vacancy sites. Using transient absorption spectroscopy, we observe trapping of photogenerated holes within 200 fs after excitation at high degrees of oxygen deficiency, which increases their lifetime at the expense of oxidative driving force. This loss in driving force limits the use of metal oxides with significant degrees of sub-stoichiometry to photocatalytic reactions that require low oxidation power such as pollutant degradation, and highlights the need to fine-tune vacancy state distributions for specific target reactions.
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Affiliation(s)
- Michael Sachs
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ;
| | - Ji-Sang Park
- Department of Materials , Imperial College London , London , SW7 2AZ , UK.,Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - Ernest Pastor
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ;
| | - Andreas Kafizas
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ; .,The Grantham Institute , Imperial College London , London , SW7 2AZ , UK
| | - Anna A Wilson
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ;
| | - Laia Francàs
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ;
| | - Sheraz Gul
- Molecular Biophysics and Integrated Bioimaging Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Min Ling
- Department of Chemistry , University College London , 20 Gordon Street , London , WC1H 0AJ , UK
| | - Chris Blackman
- Department of Chemistry , University College London , 20 Gordon Street , London , WC1H 0AJ , UK
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Aron Walsh
- Department of Materials , Imperial College London , London , SW7 2AZ , UK.,Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea
| | - James R Durrant
- Department of Chemistry , Imperial College London , London , SW7 2AZ , UK . ;
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21
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Dong Y, Cha H, Zhang J, Pastor E, Tuladhar PS, McCulloch I, Durrant JR, Bakulin AA. The binding energy and dynamics of charge-transfer states in organic photovoltaics with low driving force for charge separation. J Chem Phys 2019; 150:104704. [DOI: 10.1063/1.5079285] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yifan Dong
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Hyojung Cha
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jiangbin Zhang
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Ernest Pastor
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Pabitra Shakya Tuladhar
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Iain McCulloch
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Physical Sciences and Engineering Division, KAUST Solar Centre (KSC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - James R. Durrant
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- SPECIFIC IKC, College of Engineering, Swansea University, Swansea SA12 7AX, United Kingdom
| | - Artem A. Bakulin
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
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22
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Aitchison CM, Andrei V, Antón-García D, Apfel UP, Badiani V, Beller M, Bocarsly AB, Bonnet S, Brueggeller P, Caputo CA, Cassiola F, Clausing ST, Cooper AI, Creissen CE, de la Peña O’Shea VA, Domcke W, Durrant JR, Grätzel M, Hammarström L, Hankin A, Hatzell MC, Karadas F, König B, Kuehnel MF, Lamaison S, Lin CY, Maneiro M, Minteer SD, R. Paris A, Pastor E, Pornrungroj C, Reek JNH, Reisner E, Roy S, Sahm C, Shankar R, Shaw WJ, Shylin SI, Smith WA, Sokol K, Soo HS, Sprick RS, Viertl W, Vogel A, Wagner A, Wakerley D, Wang Q, Wielend D, Zwijnenburg MA. Synthetic approaches to artificial photosynthesis: general discussion. Faraday Discuss 2019; 215:242-281. [DOI: 10.1039/c9fd90024a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Kern J, Chatterjee R, Young ID, Fuller FD, Lassalle L, Ibrahim M, Gul S, Fransson T, Brewster AS, Alonso-Mori R, Hussein R, Zhang M, Douthit L, de Lichtenberg C, Cheah MH, Shevela D, Wersig J, Seuffert I, Sokaras D, Pastor E, Weninger C, Kroll T, Sierra RG, Aller P, Butryn A, Orville AM, Liang M, Batyuk A, Koglin JE, Carbajo S, Boutet S, Moriarty NW, Holton JM, Dobbek H, Adams PD, Bergmann U, Sauter NK, Zouni A, Messinger J, Yano J, Yachandra VK. Structures of the intermediates of Kok's photosynthetic water oxidation clock. Nature 2018; 563:421-425. [PMID: 30405241 DOI: 10.1038/s41586-018-0681-2] [Citation(s) in RCA: 297] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 08/22/2018] [Indexed: 12/18/2022]
Abstract
Inspired by the period-four oscillation in flash-induced oxygen evolution of photosystem II discovered by Joliot in 1969, Kok performed additional experiments and proposed a five-state kinetic model for photosynthetic oxygen evolution, known as Kok's S-state clock or cycle1,2. The model comprises four (meta)stable intermediates (S0, S1, S2 and S3) and one transient S4 state, which precedes dioxygen formation occurring in a concerted reaction from two water-derived oxygens bound at an oxo-bridged tetra manganese calcium (Mn4CaO5) cluster in the oxygen-evolving complex3-7. This reaction is coupled to the two-step reduction and protonation of the mobile plastoquinone QB at the acceptor side of PSII. Here, using serial femtosecond X-ray crystallography and simultaneous X-ray emission spectroscopy with multi-flash visible laser excitation at room temperature, we visualize all (meta)stable states of Kok's cycle as high-resolution structures (2.04-2.08 Å). In addition, we report structures of two transient states at 150 and 400 µs, revealing notable structural changes including the binding of one additional 'water', Ox, during the S2→S3 state transition. Our results suggest that one water ligand to calcium (W3) is directly involved in substrate delivery. The binding of the additional oxygen Ox in the S3 state between Ca and Mn1 supports O-O bond formation mechanisms involving O5 as one substrate, where Ox is either the other substrate oxygen or is perfectly positioned to refill the O5 position during O2 release. Thus, our results exclude peroxo-bond formation in the S3 state, and the nucleophilic attack of W3 onto W2 is unlikely.
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Affiliation(s)
- Jan Kern
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Ruchira Chatterjee
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Iris D Young
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Franklin D Fuller
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Louise Lassalle
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Mohamed Ibrahim
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Sheraz Gul
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Thomas Fransson
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Interdisciplinary Center for Scientific Computing, University of Heidelberg, Heidelberg, Germany
| | - Aaron S Brewster
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | | | - Rana Hussein
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Miao Zhang
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Lacey Douthit
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Casper de Lichtenberg
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden.,Department of Chemistry-Ångström, Molecular Biomimetics, Uppsala University, Uppsala, Sweden
| | - Mun Hon Cheah
- Department of Chemistry-Ångström, Molecular Biomimetics, Uppsala University, Uppsala, Sweden
| | - Dmitry Shevela
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden
| | - Julia Wersig
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Ina Seuffert
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | | | - Ernest Pastor
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | | | - Thomas Kroll
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | | | - Pierre Aller
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - Agata Butryn
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - Allen M Orville
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - Mengning Liang
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | | | - Jason E Koglin
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Sergio Carbajo
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | | | - Nigel W Moriarty
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - James M Holton
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,SSRL, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.,Department of Biochemistry and Biophysics, University of California, San Francisco, CA, USA
| | - Holger Dobbek
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Paul D Adams
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA
| | - Uwe Bergmann
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Nicholas K Sauter
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Athina Zouni
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany.
| | - Johannes Messinger
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden. .,Department of Chemistry-Ångström, Molecular Biomimetics, Uppsala University, Uppsala, Sweden.
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
| | - Vittal K Yachandra
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
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Ielpo B, Simó V, Pastor E, Arredondo J, Villafañe A, Fuentes S, Padilla L, Orille V, Lorenzo E, Corona A, Diago MV. Combined transanal minimally invasive surgery (TAMIS) and retroperitoneal laparoscopy for resection of lymph node recurrence of ovarian cancer. Tech Coloproctol 2018; 22:725. [PMID: 30225755 DOI: 10.1007/s10151-018-1849-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 09/01/2018] [Indexed: 11/28/2022]
Affiliation(s)
- B Ielpo
- Department of General Surgery, León University Hospital, León, Spain.
| | - V Simó
- Department of General Surgery, León University Hospital, León, Spain
| | - E Pastor
- Department of General Surgery, León University Hospital, León, Spain
| | - J Arredondo
- Department of General Surgery, León University Hospital, León, Spain
| | - A Villafañe
- Department of General Surgery, León University Hospital, León, Spain
| | - S Fuentes
- Department of General Surgery, León University Hospital, León, Spain
| | - L Padilla
- Department of Gynecology, León University Hospital, León, Spain
| | - V Orille
- Department of Gynecology, León University Hospital, León, Spain
| | - E Lorenzo
- Department of Gynecology, León University Hospital, León, Spain
| | - A Corona
- Department of Gynecology, León University Hospital, León, Spain
| | - M V Diago
- Department of General Surgery, León University Hospital, León, Spain
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Pérez-Rodríguez S, García G, Lázaro M, Pastor E. DEMS strategy for the determination of the difference in surface acidity of carbon materials. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.04.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Ferrando C, Tusman G, Suarez-Sipmann F, León I, Pozo N, Carbonell J, Puig J, Pastor E, Gracia E, Gutiérrez A, Aguilar G, Belda FJ, Soro M. Individualized lung recruitment maneuver guided by pulse-oximetry in anesthetized patients undergoing laparoscopy: a feasibility study. Acta Anaesthesiol Scand 2018; 62:608-619. [PMID: 29377061 DOI: 10.1111/aas.13082] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 12/21/2017] [Accepted: 01/02/2018] [Indexed: 01/27/2023]
Abstract
BACKGROUND We conducted this study to test whether pulse-oximetry hemoglobin saturation (SpO2 ) can personalize the implementation of an open-lung approach during laparoscopy. Thirty patients with SpO2 ≥ 97% on room-air before anesthesia were studied. After anesthesia and capnoperitoneum the FIO2 was reduced to 0.21. Those patients whose SpO2 decreased below 97% - an indication of shunt related to atelectasis - completed the following phases: (1) First recruitment maneuver (RM), until reaching lung's opening pressure, defined as the inspiratory pressure level yielding a SpO2 ≥ 97%; (2) decremental positive end-expiratory (PEEP) titration trial until reaching lung's closing pressure defined as the PEEP level yielding a SpO2 < 97%; (3) second RM and, (4) ongoing ventilation with PEEP adjusted above the detected closing pressure. RESULTS When breathing air, in 24 of 30 patients SpO2 was < 97%, PaO2 /FIO2 ˂ 53.3 kPa and negative end-expiratory transpulmonary pressure (PTP-EE ). The mean (SD) opening pressures were found at 40 (5) and 33 (4) cmH2 O during the first and second RM, respectively (P < 0.001; 95% CI: 3.2-7.7). The closing pressure was found at 11 (5) cmH2 O. This SpO2 -guided approach increased PTP-EE (from -6.4 to 1.2 cmH2 O, P < 0.001) and PaO2 /FIO2 (from 30.3 to 58.1 kPa, P < 0.001) while decreased driving pressure (from 18 to 10 cmH2 O, P < 0.001). SpO2 discriminated the lung's opening and closing pressures with accuracy taking the reference parameter PTP-EE (area under the receiver-operating-curve of 0.89, 95% CI: 0.80-0.99). CONCLUSION The non-invasive SpO2 monitoring can help to individualize an open-lung approach, including all involved steps, from the identification of those patients who can benefit from recruitment, the identification of opening and closing pressures to the subsequent monitoring of an open-lung condition.
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Affiliation(s)
- C. Ferrando
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
- CIBER de Enfermedades Respiratorias; Instituto de Salud Carlos III; Madrid Spain
| | - G. Tusman
- Department of Anesthesiology; Hospital Privado de Comunidad Mar de Plata; Mar de Plata Argentina
| | - F. Suarez-Sipmann
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
- Deparment of Intensive Care; Hospital Universitario La Princesa; Madrid Spain
| | - I. León
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - N. Pozo
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - J. Carbonell
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - J. Puig
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - E. Pastor
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - E. Gracia
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - A. Gutiérrez
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - G. Aguilar
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - F. J. Belda
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
| | - M. Soro
- Department of Anaesthesiology and Critical Care; Hospital Clínico Universitario; Valencia Spain
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Kroll T, Weninger C, Alonso-Mori R, Sokaras D, Zhu D, Mercadier L, Majety VP, Marinelli A, Lutman A, Guetg MW, Decker FJ, Boutet S, Aquila A, Koglin J, Koralek J, DePonte DP, Kern J, Fuller FD, Pastor E, Fransson T, Zhang Y, Yano J, Yachandra VK, Rohringer N, Bergmann U. Stimulated X-Ray Emission Spectroscopy in Transition Metal Complexes. Phys Rev Lett 2018; 120:133203. [PMID: 29694162 PMCID: PMC6007888 DOI: 10.1103/physrevlett.120.133203] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 11/16/2017] [Indexed: 05/07/2023]
Abstract
We report the observation and analysis of the gain curve of amplified Kα x-ray emission from solutions of Mn(II) and Mn(VII) complexes using an x-ray free electron laser to create the 1s core-hole population inversion. We find spectra at amplification levels extending over 4 orders of magnitude until saturation. We observe bandwidths below the Mn 1s core-hole lifetime broadening in the onset of the stimulated emission. In the exponential amplification regime the resolution corrected spectral width of ∼1.7 eV FWHM is constant over 3 orders of magnitude, pointing to the buildup of transform limited pulses of ∼1 fs duration. Driving the amplification into saturation leads to broadening and a shift of the line. Importantly, the chemical sensitivity of the stimulated x-ray emission to the Mn oxidation state is preserved at power densities of ∼10^{20} W/cm^{2} for the incoming x-ray pulses. Differences in signal sensitivity and spectral information compared to conventional (spontaneous) x-ray emission spectroscopy are discussed. Our findings build a baseline for nonlinear x-ray spectroscopy for a wide range of transition metal complexes in inorganic chemistry, catalysis, and materials science.
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Affiliation(s)
- Thomas Kroll
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Clemens Weninger
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
| | - Roberto Alonso-Mori
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Dimosthenis Sokaras
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Diling Zhu
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Laurent Mercadier
- Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
| | - Vinay P Majety
- Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
| | - Agostino Marinelli
- Accelerator Directorate, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Alberto Lutman
- Accelerator Directorate, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Marc W Guetg
- Accelerator Directorate, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Franz-Josef Decker
- Accelerator Directorate, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Sébastien Boutet
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Andy Aquila
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jason Koglin
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jake Koralek
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Daniel P DePonte
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Jan Kern
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence, Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Franklin D Fuller
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence, Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Ernest Pastor
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence, Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Thomas Fransson
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Yu Zhang
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence, Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Vittal K Yachandra
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence, Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Nina Rohringer
- Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
- Center for Free-Electron Laser Science, DESY, 22607 Hamburg, Germany
- Department of Physics, Universität Hamburg, 20355 Hamburg, Germany
| | - Uwe Bergmann
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Francàs L, Mesa CA, Pastor E, Le Formal F, Durrant JR. Chapter 5. Rate Law Analysis of Water Splitting Photoelectrodes. Advances in Photoelectrochemical Water Splitting 2018. [DOI: 10.1039/9781782629863-00128] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Pérez-Rodríguez S, Sebastián D, Lázaro M, Pastor E. Stability and catalytic properties of nanostructured carbons in electrochemical environments. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Miner EM, Gul S, Ricke ND, Pastor E, Yano J, Yachandra VK, Van Voorhis T, Dincă M. Mechanistic Evidence for Ligand-Centered Electrocatalytic Oxygen Reduction with the Conductive MOF Ni3(hexaiminotriphenylene)2. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02647] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Elise M. Miner
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Sheraz Gul
- Molecular Biophysics & Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Nathan D. Ricke
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Ernest Pastor
- Molecular Biophysics & Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Junko Yano
- Molecular Biophysics & Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Vittal K. Yachandra
- Molecular Biophysics & Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Troy Van Voorhis
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mircea Dincă
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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31
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Mesa CA, Kafizas A, Francàs L, Pendlebury SR, Pastor E, Ma Y, Le Formal F, Mayer MT, Grätzel M, Durrant JR. Kinetics of Photoelectrochemical Oxidation of Methanol on Hematite Photoanodes. J Am Chem Soc 2017; 139:11537-11543. [PMID: 28735533 PMCID: PMC5594441 DOI: 10.1021/jacs.7b05184] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The kinetics of photoelectrochemical
(PEC) oxidation of methanol, as a model organic substrate, on α-Fe2O3 photoanodes are studied using photoinduced absorption
spectroscopy and transient photocurrent measurements. Methanol is
oxidized on α-Fe2O3 to formaldehyde with
near unity Faradaic efficiency. A rate law analysis under quasi-steady-state
conditions of PEC methanol oxidation indicates that rate of reaction
is second order in the density of surface holes on hematite and independent
of the applied potential. Analogous data on anatase TiO2 photoanodes indicate similar second-order kinetics for methanol
oxidation with a second-order rate constant 2 orders of magnitude
higher than that on α-Fe2O3. Kinetic isotope
effect studies determine that the rate constant for methanol oxidation
on α-Fe2O3 is retarded ∼20-fold
by H/D substitution. Employing these data, we propose a mechanism
for methanol oxidation under 1 sun irradiation on these metal oxide
surfaces and discuss the implications for the efficient PEC methanol
oxidation to formaldehyde and concomitant hydrogen evolution.
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Affiliation(s)
- Camilo A Mesa
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Andreas Kafizas
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Laia Francàs
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Stephanie R Pendlebury
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Ernest Pastor
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Yimeng Ma
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
| | - Florian Le Formal
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom.,Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
| | - Matthew T Mayer
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
| | - Michael Grätzel
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
| | - James R Durrant
- Department of Chemistry, Imperial College London , South Kensington Campus, London SW7 2 AZ, United Kingdom
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Francàs L, Matheu R, Pastor E, Reynal A, Berardi S, Sala X, Llobet A, Durrant JR. Kinetic Analysis of an Efficient Molecular Light-Driven Water Oxidation System. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01357] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Laia Francàs
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Roc Matheu
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Ernest Pastor
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Anna Reynal
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
- Department
of Science, Teesside University, Borough Road, Middlesbrough TS1 3BA, United Kingdom
| | - Serena Berardi
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Xavier Sala
- Departament
de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - James R. Durrant
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
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Bousquet J, Bourret R, Camuzat T, Augé P, Bringer J, Noguès M, Jonquet O, de la Coussaye JE, Ankri J, Cesari M, Guérin O, Vellas B, Blain H, Arnavielhe S, Avignon A, Combe B, Canovas G, Daien C, Dray G, Dupeyron A, Jeandel C, Laffont I, Laune D, Marion C, Pastor E, Pélissier JY, Galan B, Reynes J, Reuzeau JC, Bedbrook A, Granier S, Adnet PA, Amouyal M, Alomène B, Bernard PL, Berr C, Caimmi D, Claret PG, Costa DJ, Cristol JP, Fesler P, Hève D, Millot-Keurinck J, Morquin D, Ninot G, Picot MC, Raffort N, Roubille F, Sultan A, Touchon J, Attalin V, Azevedo C, Badin M, Bakhti K, Bardy B, Battesti MP, Bobia X, Boegner C, Boichot S, Bonnin HY, Bouly S, Boubakri C, Bourrain JL, Bourrel G, Bouix V, Bruguière V, Cade S, Camu W, Carre V, Cavalli G, Cayla G, Chiron R, Coignard P, Coroian F, Costa P, Cottalorda J, Coulet B, Coupet AL, Courrouy-Michel MC, Courtet P, Cros V, Cuisinier F, Danko M, Dauenhauer P, Dauzat M, David M, Davy JM, Delignières D, Demoly P, Desplan J, Dujols P, Dupeyron G, Engberink O, Enjalbert M, Fattal C, Fernandes J, Fouletier M, Fraisse P, Gabrion P, Gellerat-Rogier M, Gelis A, Genis C, Giraudeau N, Goucham AY, Gouzi F, Gressard F, Gris JC, Guillot B, Guiraud D, Handweiler V, Hayot M, Hérisson C, Heroum C, Hoa D, Jacquemin S, Jaber S, Jakovenko D, Jorgensen C, Kouyoudjian P, Lamoureux R, Landreau L, Lapierre M, Larrey D, Laurent C, Léglise MS, Lemaitre JM, Le Quellec A, Leclercq F, Lehmann S, Lognos B, Lussert CM, Makinson A, Mandrick K, Mares P, Martin-Gousset P, Matheron A, Mathieu G, Meissonnier M, Mercier G, Messner P, Meunier C, Mondain M, Morales R, Morel J, Mottet D, Nérin P, Nicolas P, Nouvel F, Paccard D, Pandraud G, Pasdelou MP, Pasquié JL, Patte K, Perrey S, Pers YM, Portejoie F, Pujol JLE, Quantin X, Quéré I, Ramdani S, Ribstein J, Rédini-Martinez I, Richard S, Ritchie K, Riso JP, Rivier F, Robine JM, Rolland C, Royère E, Sablot D, Savy JL, Schifano L, Senesse P, Sicard R, Stephan Y, Strubel D, Tallon G, Tanfin M, Tassery H, Tavares I, Torre K, Tribout V, Uziel A, Van de Perre P, Venail F, Vergne-Richard C, Vergotte G, Vian L, Vialla F, Viart F, Villain M, Viollet E, Ychou M, Mercier J. MACVIA-LR (Fighting Chronic Diseases for Active and Healthy Ageing in Languedoc-Roussillon): A Success Story of the European Innovation Partnership on Active and Healthy Ageing. J Frailty Aging 2017; 5:233-241. [PMID: 27883170 DOI: 10.14283/jfa.2016.105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The Région Languedoc Roussillon is the umbrella organisation for an interconnected and integrated project on active and healthy ageing (AHA). It covers the 3 pillars of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA): (A) Prevention and health promotion, (B) Care and cure, (C) and (D) Active and independent living of elderly people. All sub-activities (poly-pharmacy, falls prevention initiative, prevention of frailty, chronic respiratory diseases, chronic diseases with multimorbidities, chronic infectious diseases, active and independent living and disability) have been included in MACVIA-LR which has a strong political commitment and involves all stakeholders (public, private, patients, policy makers) including CARSAT-LR and the Eurobiomed cluster. It is a Reference Site of the EIP on AHA. The framework of MACVIA-LR has the vision that the prevention and management of chronic diseases is essential for the promotion of AHA and for the reduction of handicap. The main objectives of MACVIA-LR are: (i) to develop innovative solutions for a network of Living labs in order to reduce avoidable hospitalisations and loss of autonomy while improving quality of life, (ii) to disseminate the innovation. The three years of MACVIA-LR activities are reported in this paper.
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Affiliation(s)
- J Bousquet
- Professor Jean Bousquet, CHRU, 371 Avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France, Tel +33 611 42 88 47,
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Kafizas A, Ma Y, Pastor E, Pendlebury SR, Mesa C, Francàs L, Le Formal F, Noor N, Ling M, Sotelo-Vazquez C, Carmalt CJ, Parkin IP, Durrant JR. Water Oxidation Kinetics of Accumulated Holes on the Surface of a TiO2 Photoanode: A Rate Law Analysis. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01150] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Andreas Kafizas
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Yimeng Ma
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Ernest Pastor
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Stephanie R. Pendlebury
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Camilo Mesa
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Laia Francàs
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Florian Le Formal
- Laboratory
for Molecular Engineering of Optoelectronic Nanomaterials, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Nuruzzaman Noor
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Min Ling
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Carlos Sotelo-Vazquez
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Claire J. Carmalt
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Ivan P. Parkin
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - James R. Durrant
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
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35
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Lassalle L, Young I, Ibrahim M, Chatterjee R, Gul S, Fuller F, Brewster A, Douthit L, Pastor E, Sauter N, Zouni A, Kern J, Yachandra V, Yano J. Exploring the dynamic of PSII at room temperature by simultaneous femtosecond X-ray spectroscopy and dffraction. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s0108767317098865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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36
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Fuller FD, Gul S, Chatterjee R, Burgie ES, Young ID, Lebrette H, Srinivas V, Brewster AS, Michels-Clark T, Clinger JA, Andi B, Ibrahim M, Pastor E, de Lichtenberg C, Hussein R, Pollock CJ, Zhang M, Stan CA, Kroll T, Fransson T, Weninger C, Kubin M, Aller P, Lassalle L, Bräuer P, Miller MD, Amin M, Koroidov S, Roessler CG, Allaire M, Sierra RG, Docker PT, Glownia JM, Nelson S, Koglin JE, Zhu D, Chollet M, Song S, Lemke H, Liang M, Sokaras D, Alonso-Mori R, Zouni A, Messinger J, Bergmann U, Boal AK, Bollinger JM, Krebs C, Högbom M, Phillips GN, Vierstra RD, Sauter NK, Orville AM, Kern J, Yachandra VK, Yano J. Drop-on-demand sample delivery for studying biocatalysts in action at X-ray free-electron lasers. Nat Methods 2017; 14:443-449. [PMID: 28250468 DOI: 10.1038/nmeth.4195] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 01/18/2017] [Indexed: 12/22/2022]
Abstract
X-ray crystallography at X-ray free-electron laser sources is a powerful method for studying macromolecules at biologically relevant temperatures. Moreover, when combined with complementary techniques like X-ray emission spectroscopy, both global structures and chemical properties of metalloenzymes can be obtained concurrently, providing insights into the interplay between the protein structure and dynamics and the chemistry at an active site. The implementation of such a multimodal approach can be compromised by conflicting requirements to optimize each individual method. In particular, the method used for sample delivery greatly affects the data quality. We present here a robust way of delivering controlled sample amounts on demand using acoustic droplet ejection coupled with a conveyor belt drive that is optimized for crystallography and spectroscopy measurements of photochemical and chemical reactions over a wide range of time scales. Studies with photosystem II, the phytochrome photoreceptor, and ribonucleotide reductase R2 illustrate the power and versatility of this method.
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Affiliation(s)
- Franklin D Fuller
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Sheraz Gul
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Ruchira Chatterjee
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - E Sethe Burgie
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Iris D Young
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Hugo Lebrette
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Vivek Srinivas
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Aaron S Brewster
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Tara Michels-Clark
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | | - Babak Andi
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York, USA
| | - Mohamed Ibrahim
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Ernest Pastor
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | | - Rana Hussein
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Christopher J Pollock
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Miao Zhang
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Claudiu A Stan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Thomas Kroll
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Thomas Fransson
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Clemens Weninger
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California, USA.,LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Markus Kubin
- Institute for Methods and Instrumentation on Synchrotron Radiation Research, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany
| | - Pierre Aller
- Diamond Light Source Limited, Harwell Science and Innovation Campus, Didcot, UK
| | - Louise Lassalle
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Philipp Bräuer
- Diamond Light Source Limited, Harwell Science and Innovation Campus, Didcot, UK.,Department of Biochemistry, University of Oxford, Oxford, UK
| | | | - Muhamed Amin
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Sergey Koroidov
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden.,Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Christian G Roessler
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York, USA
| | - Marc Allaire
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Raymond G Sierra
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Peter T Docker
- Diamond Light Source Limited, Harwell Science and Innovation Campus, Didcot, UK
| | - James M Glownia
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Silke Nelson
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Jason E Koglin
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Diling Zhu
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Matthieu Chollet
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Sanghoon Song
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Henrik Lemke
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Mengning Liang
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | | | | | - Athina Zouni
- Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Johannes Messinger
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden.,Department of Chemistry-Ångström, Molecular Biomimetics, Uppsala University, Uppsala, Sweden
| | - Uwe Bergmann
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Amie K Boal
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania, USA.,Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, Pennsylvania, USA
| | - J Martin Bollinger
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania, USA.,Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Carsten Krebs
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania, USA.,Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Martin Högbom
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden.,Department of Chemistry, Stanford University, Stanford, California, USA
| | - George N Phillips
- Department of BioSciences, Rice University, Houston, Texas, USA.,Department of Chemistry, Rice University, Houston, Texas, USA
| | - Richard D Vierstra
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Nicholas K Sauter
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Allen M Orville
- Diamond Light Source Limited, Harwell Science and Innovation Campus, Didcot, UK
| | - Jan Kern
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA.,LCLS, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Vittal K Yachandra
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
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37
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Pastor E, Le Formal F, Mayer MT, Tilley SD, Francàs L, Mesa CA, Grätzel M, Durrant JR. Spectroelectrochemical analysis of the mechanism of (photo)electrochemical hydrogen evolution at a catalytic interface. Nat Commun 2017; 8:14280. [PMID: 28233785 PMCID: PMC5333116 DOI: 10.1038/ncomms14280] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/09/2016] [Indexed: 12/18/2022] Open
Abstract
Multi-electron heterogeneous catalysis is a pivotal element in the (photo)electrochemical generation of solar fuels. However, mechanistic studies of these systems are difficult to elucidate by means of electrochemical methods alone. Here we report a spectroelectrochemical analysis of hydrogen evolution on ruthenium oxide employed as an electrocatalyst and as part of a cuprous oxide-based photocathode. We use optical absorbance spectroscopy to quantify the densities of reduced ruthenium oxide species, and correlate these with current densities resulting from proton reduction. This enables us to compare directly the catalytic function of dark and light electrodes. We find that hydrogen evolution is second order in the density of active, doubly reduced species independent of whether these are generated by applied potential or light irradiation. Our observation of a second order rate law allows us to distinguish between the most common reaction paths and propose a mechanism involving the homolytic reductive elimination of hydrogen.
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Affiliation(s)
- Ernest Pastor
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Florian Le Formal
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Matthew T. Mayer
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Photonics and Interfaces, Station 6, CH-1015 Lausanne, Switzerland
| | - S. David Tilley
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Photonics and Interfaces, Station 6, CH-1015 Lausanne, Switzerland
| | - Laia Francàs
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Camilo A. Mesa
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Michael Grätzel
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Photonics and Interfaces, Station 6, CH-1015 Lausanne, Switzerland
| | - James R. Durrant
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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Bousquet J, Bewick M, Cano A, Eklund P, Fico G, Goswami N, Guldemond NA, Henderson D, Hinkema MJ, Liotta G, Mair A, Molloy W, Monaco A, Monsonis-Paya I, Nizinska A, Papadopoulos H, Pavlickova A, Pecorelli S, Prados-Torres A, Roller-Wirnsberger RE, Somekh D, Vera-Muñoz C, Visser F, Farrell J, Malva J, Andersen Ranberg K, Camuzat T, Carriazo AM, Crooks G, Gutter Z, Iaccarino G, Manuel de Keenoy E, Moda G, Rodriguez-Mañas L, Vontetsianos T, Abreu C, Alonso J, Alonso-Bouzon C, Ankri J, Arredondo MT, Avolio F, Bedbrook A, Białoszewski AZ, Blain H, Bourret R, Cabrera-Umpierrez MF, Catala A, O'Caoimh R, Cesari M, Chavannes NH, Correia-da-Sousa J, Dedeu T, Ferrando M, Ferri M, Fokkens WJ, Garcia-Lizana F, Guérin O, Hellings PW, Haahtela T, Illario M, Inzerilli MC, Lodrup Carlsen KC, Kardas P, Keil T, Maggio M, Mendez-Zorrilla A, Menditto E, Mercier J, Michel JP, Murray R, Nogues M, O'Byrne-Maguire I, Pappa D, Parent AS, Pastorino M, Robalo-Cordeiro C, Samolinski B, Siciliano P, Teixeira AM, Tsartara SI, Valiulis A, Vandenplas O, Vasankari T, Vellas B, Vollenbroek-Hutten M, Wickman M, Yorgancioglu A, Zuberbier T, Barbagallo M, Canonica GW, Klimek L, Maggi S, Aberer W, Akdis C, Adcock IM, Agache I, Albera C, Alonso-Trujillo F, Angel Guarcia M, Annesi-Maesano I, Apostolo J, Arshad SH, Attalin V, Avignon A, Bachert C, Baroni I, Bel E, Benson M, Bescos C, Blasi F, Barbara C, Bergmann KC, Bernard PL, Bonini S, Bousquet PJ, Branchini B, Brightling CE, Bruguière V, Bunu C, Bush A, Caimmi DP, Calderon MA, Canovas G, Cardona V, Carlsen KH, Cesario A, Chkhartishvili E, Chiron R, Chivato T, Chung KF, d'Angelantonio M, De Carlo G, Cholley D, Chorin F, Combe B, Compas B, Costa DJ, Costa E, Coste O, Coupet AL, Crepaldi G, Custovic A, Dahl R, Dahlen SE, Demoly P, Devillier P, Didier A, Dinh-Xuan AT, Djukanovic R, Dokic D, Du Toit G, Dubakiene R, Dupeyron A, Emuzyte R, Fiocchi A, Wagner A, Fletcher M, Fonseca J, Fougère B, Gamkrelidze A, Garces G, Garcia-Aymeric J, Garcia-Zapirain B, Gemicioğlu B, Gouder C, Hellquist-Dahl B, Hermosilla-Gimeno I, Héve D, Holland C, Humbert M, Hyland M, Johnston SL, Just J, Jutel M, Kaidashev IP, Khaitov M, Kalayci O, Kalyoncu AF, Keijser W, Kerstjens H, Knezović J, Kowalski M, Koppelman GH, Kotska T, Kovac M, Kull I, Kuna P, Kvedariene V, Lepore V, MacNee W, Maggio M, Magnan A, Majer I, Manning P, Marcucci M, Marti T, Masoli M, Melen E, Miculinic N, Mihaltan F, Milenkovic B, Millot-Keurinck J, Mlinarić H, Momas I, Montefort S, Morais-Almeida M, Moreno-Casbas T, Mösges R, Mullol J, Nadif R, Nalin M, Navarro-Pardo E, Nekam K, Ninot G, Paccard D, Pais S, Palummeri E, Panzner P, Papadopoulos NK, Papanikolaou C, Passalacqua G, Pastor E, Perrot M, Plavec D, Popov TA, Postma DS, Price D, Raffort N, Reuzeau JC, Robine JM, Rodenas F, Robusto F, Roche N, Romano A, Romano V, Rosado-Pinto J, Roubille F, Ruiz F, Ryan D, Salcedo T, Schmid-Grendelmeier P, Schulz H, Schunemann HJ, Serrano E, Sheikh A, Shields M, Siafakas N, Scichilone N, Siciliano P, Skrindo I, Smit HA, Sourdet S, Sousa-Costa E, Spranger O, Sooronbaev T, Sruk V, Sterk PJ, Todo-Bom A, Touchon J, Tramontano D, Triggiani M, Tsartara SI, Valero AL, Valovirta E, van Ganse E, van Hage M, van den Berge M, Vandenplas O, Ventura MT, Vergara I, Vezzani G, Vidal D, Viegi G, Wagemann M, Whalley B, Wickman M, Wilson N, Yiallouros PK, Žagar M, Zaidi A, Zidarn M, Hoogerwerf EJ, Usero J, Zuffada R, Senn A, de Oliveira-Alves B. Building Bridges for Innovation in Ageing: Synergies between Action Groups of the EIP on AHA. J Nutr Health Aging 2017; 21:92-104. [PMID: 27999855 DOI: 10.1007/s12603-016-0803-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 04/12/2016] [Indexed: 01/08/2023]
Abstract
The Strategic Implementation Plan of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA) proposed six Action Groups. After almost three years of activity, many achievements have been obtained through commitments or collaborative work of the Action Groups. However, they have often worked in silos and, consequently, synergies between Action Groups have been proposed to strengthen the triple win of the EIP on AHA. The paper presents the methodology and current status of the Task Force on EIP on AHA synergies. Synergies are in line with the Action Groups' new Renovated Action Plan (2016-2018) to ensure that their future objectives are coherent and fully connected. The outcomes and impact of synergies are using the Monitoring and Assessment Framework for the EIP on AHA (MAFEIP). Eight proposals for synergies have been approved by the Task Force: Five cross-cutting synergies which can be used for all current and future synergies as they consider overarching domains (appropriate polypharmacy, citizen empowerment, teaching and coaching on AHA, deployment of synergies to EU regions, Responsible Research and Innovation), and three cross-cutting synergies focussing on current Action Group activities (falls, frailty, integrated care and chronic respiratory diseases).
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Affiliation(s)
- J Bousquet
- Professor Jean Bousquet, CHRU, 371 Avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France, Tel +33 611 42 88 47,
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Bousquet J, Bewick M, Cano A, Eklund P, Fico G, Goswami N, Guldemond NA, Henderson D, Hinkema MJ, Liotta G, Mair A, Molloy W, Monaco A, Monsonis-Paya I, Nizinska A, Papadopoulos H, Pavlickova A, Pecorelli S, Prados-Torres A, Roller-Wirnsberger RE, Somekh D, Vera-Muñoz C, Visser F, Farrell J, Malva J, Andersen Ranberg K, Camuzat T, Carriazo AM, Crooks G, Gutter Z, Iaccarino G, de Keenoy EM, Moda G, Rodriguez-Mañas L, Vontetsianos T, Abreu C, Alonso J, Alonso-Bouzon C, Ankri J, Arredondo MT, Avolio F, Bedbrook A, Białoszewski AZ, Blain H, Bourret R, Cabrera-Umpierrez MF, Catala A, O’Caoimh R, Cesari M, Chavannes NH, Correia-Da-Sousa J, Dedeu T, Ferrando M, Ferri M, Fokkens WJ, Garcia-Lizana F, Guérin O, Hellings PW, Haahtela T, Illario M, Inzerilli MC, Lodrup Carlsen KC, Kardas P, Keil T, Maggio M, Mendez-Zorrilla A, Menditto E, Mercier J, Michel JP, Murray R, Nogues M, O’Byrne-Maguire I, Pappa D, Parent AS, Pastorino M, Robalo-Cordeiro C, Samolinski B, Siciliano P, Teixeira AM, Tsartara SI, Valiulis A, Vandenplas O, Vasankari T, Vellas B, Vollenbroek-Hutten M, Wickman M, Yorgancioglu A, Zuberbier T, Barbagallo M, Canonica GW, Klimek L, Maggi S, Aberer W, Akdis C, Adcock IM, Agache I, Albera C, Alonso-Trujillo F, Angel Guarcia M, Annesi-Maesano I, Apostolo J, Arshad SH, Attalin V, Avignon A, Bachert C, Baroni I, Bel E, Benson M, Bescos C, Blasi F, Barbara C, Bergmann KC, Bernard PL, Bonini S, Bousquet PJ, Branchini B, Brightling CE, Bruguière V, Bunu C, Bush A, Caimmi DP, Calderon MA, Canovas G, Cardona V, Carlsen KH, Cesario A, Chkhartishvili E, Chiron R, Chivato T, Chung KF, D’Angelantonio M, de Carlo G, Cholley D, Chorin F, Combe B, Compas B, Costa DJ, Costa E, Coste O, Coupet AL, Crepaldi G, Custovic A, Dahl R, Dahlen SE, Demoly P, Devillier P, Didier A, Dinh-Xuan AT, Djukanovic R, Dokic D, du Toit G, Dubakiene R, Dupeyron A, Emuzyte R, Fiocchi A, Wagner A, Fletcher M, Fonseca J, Fougère B, Gamkrelidze A, Garces G, Garcia-Aymeric J, Garcia-Zapirain B, Gemicioğlu B, Gouder C, Hellquist-Dahl B, Hermosilla-Gimeno I, Héve D, Holland C, Humbert M, Hyland M, Johnston SL, Just J, Jutel M, Kaidashev IP, Khaitov M, Kalayci O, Kalyoncu AF, Keijser W, Kerstjens H, Knezović J, Kowalski M, Koppelman GH, Kotska T, Kovac M, Kull I, Kuna P, Kvedariene V, Lepore V, Macnee W, Maggio M, Magnan A, Majer I, Manning P, Marcucci M, Marti T, Masoli M, Melen E, Miculinic N, Mihaltan F, Milenkovic B, Millot-Keurinck J, Mlinarić H, Momas I, Montefort S, Morais-Almeida M, Moreno-Casbas T, Mösges R, Mullol J, Nadif R, Nalin M, Navarro-Pardo E, Nekam K, Ninot G, Paccard D, Pais S, Palummeri E, Panzner P, Papadopoulos NK, Papanikolaou C, Passalacqua G, Pastor E, Perrot M, Plavec D, Popov TA, Postma DS, Price D, Raffort N, Reuzeau JC, Robine JM, Rodenas F, Robusto F, Roche N, Romano A, Romano V, Rosado-Pinto J, Roubille F, Ruiz F, Ryan D, Salcedo T, Schmid-Grendelmeier P, Schulz H, Schunemann HJ, Serrano E, Sheikh A, Shields M, Siafakas N, Scichilone N, Siciliano P, Skrindo I, Smit HA, Sourdet S, Sousa-Costa E, Spranger O, Sooronbaev T, Sruk V, Sterk PJ, Todo-Bom A, Touchon J, Tramontano D, Triggiani M, Tsartara SI, Valero AL, Valovirta E, van Ganse E, van Hage M, van den Berge M, Vandenplas O, Ventura MT, Vergara I, Vezzani G, Vidal D, Viegi G, Wagemann M, Whalley B, Wickman M, Wilson N, Yiallouros PK, Žagar M, Zaidi A, Zidarn M, Hoogerwerf EJ, Usero J, Zuffada R, Senn A, de Oliveira-Alves B. Erratum to: Building bridges for innovation in ageing: Synergies between action groups of the EIP on AHA. J Nutr Health Aging 2016. [DOI: 10.1007/s12603-016-0850-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Young ID, Ibrahim M, Chatterjee R, Gul S, Fuller F, Koroidov S, Brewster AS, Tran R, Alonso-Mori R, Kroll T, Michels-Clark T, Laksmono H, Sierra RG, Stan CA, Hussein R, Zhang M, Douthit L, Kubin M, de Lichtenberg C, Long Vo P, Nilsson H, Cheah MH, Shevela D, Saracini C, Bean MA, Seuffert I, Sokaras D, Weng TC, Pastor E, Weninger C, Fransson T, Lassalle L, Bräuer P, Aller P, Docker PT, Andi B, Orville AM, Glownia JM, Nelson S, Sikorski M, Zhu D, Hunter MS, Lane TJ, Aquila A, Koglin JE, Robinson J, Liang M, Boutet S, Lyubimov AY, Uervirojnangkoorn M, Moriarty NW, Liebschner D, Afonine PV, Waterman DG, Evans G, Wernet P, Dobbek H, Weis WI, Brunger AT, Zwart PH, Adams PD, Zouni A, Messinger J, Bergmann U, Sauter NK, Kern J, Yachandra VK, Yano J. Structure of photosystem II and substrate binding at room temperature. Nature 2016; 540:453-457. [PMID: 27871088 DOI: 10.1038/nature20161] [Citation(s) in RCA: 281] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 10/14/2016] [Indexed: 12/16/2022]
Abstract
Light-induced oxidation of water by photosystem II (PS II) in plants, algae and cyanobacteria has generated most of the dioxygen in the atmosphere. PS II, a membrane-bound multi-subunit pigment protein complex, couples the one-electron photochemistry at the reaction centre with the four-electron redox chemistry of water oxidation at the Mn4CaO5 cluster in the oxygen-evolving complex (OEC). Under illumination, the OEC cycles through five intermediate S-states (S0 to S4), in which S1 is the dark-stable state and S3 is the last semi-stable state before O-O bond formation and O2 evolution. A detailed understanding of the O-O bond formation mechanism remains a challenge, and will require elucidation of both the structures of the OEC in the different S-states and the binding of the two substrate waters to the catalytic site. Here we report the use of femtosecond pulses from an X-ray free electron laser (XFEL) to obtain damage-free, room temperature structures of dark-adapted (S1), two-flash illuminated (2F; S3-enriched), and ammonia-bound two-flash illuminated (2F-NH3; S3-enriched) PS II. Although the recent 1.95 Å resolution structure of PS II at cryogenic temperature using an XFEL provided a damage-free view of the S1 state, measurements at room temperature are required to study the structural landscape of proteins under functional conditions, and also for in situ advancement of the S-states. To investigate the water-binding site(s), ammonia, a water analogue, has been used as a marker, as it binds to the Mn4CaO5 cluster in the S2 and S3 states. Since the ammonia-bound OEC is active, the ammonia-binding Mn site is not a substrate water site. This approach, together with a comparison of the native dark and 2F states, is used to discriminate between proposed O-O bond formation mechanisms.
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Affiliation(s)
- Iris D Young
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Mohamed Ibrahim
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | - Ruchira Chatterjee
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Sheraz Gul
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Franklin Fuller
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Sergey Koroidov
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Aaron S Brewster
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Rosalie Tran
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | | | - Thomas Kroll
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.,SSRL, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Tara Michels-Clark
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Hartawan Laksmono
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Raymond G Sierra
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.,Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Claudiu A Stan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Rana Hussein
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | - Miao Zhang
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | - Lacey Douthit
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Markus Kubin
- Institute for Methods and Instrumentation on Synchrotron Radiation Research, Helmholtz Zentrum, 14109 Berlin, Germany
| | - Casper de Lichtenberg
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Pham Long Vo
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Håkan Nilsson
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Mun Hon Cheah
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Dmitriy Shevela
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden
| | - Claudio Saracini
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Mackenzie A Bean
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ina Seuffert
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | | | - Tsu-Chien Weng
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Ernest Pastor
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Clemens Weninger
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Thomas Fransson
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Louise Lassalle
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Philipp Bräuer
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.,Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Pierre Aller
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Peter T Docker
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Babak Andi
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Allen M Orville
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - James M Glownia
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Silke Nelson
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Marcin Sikorski
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Diling Zhu
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Mark S Hunter
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Thomas J Lane
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Andy Aquila
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Jason E Koglin
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Joseph Robinson
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Mengning Liang
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Sébastien Boutet
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Artem Y Lyubimov
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | | | - Nigel W Moriarty
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Dorothee Liebschner
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Pavel V Afonine
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - David G Waterman
- STFC Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK and CCP4, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot, OX11 0FA, UK
| | - Gwyndaf Evans
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Philippe Wernet
- Institute for Methods and Instrumentation on Synchrotron Radiation Research, Helmholtz Zentrum, 14109 Berlin, Germany
| | - Holger Dobbek
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | - William I Weis
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA.,Department of Photon Science, Stanford University, Stanford, CA 94305.,Department of Structural Biology, Stanford University, Stanford, CA 94305
| | - Axel T Brunger
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA.,Department of Photon Science, Stanford University, Stanford, CA 94305
| | - Petrus H Zwart
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Paul D Adams
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Department of Bioengineering, University of California Berkeley, Berkeley, CA 94720
| | - Athina Zouni
- Institut für Biologie, Humboldt-Universität zu Berlin, D-10099 Berlin, Germany
| | - Johannes Messinger
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, SE 90187 Umeå, Sweden.,Department of Chemistry, Molecular Biomimetics, Ångström Laboratory, Uppsala University, SE 75237 Uppsala, Sweden
| | - Uwe Bergmann
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Nicholas K Sauter
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jan Kern
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Vittal K Yachandra
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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Sachs M, Pastor E, Kafizas A, Durrant JR. Evaluation of Surface State Mediated Charge Recombination in Anatase and Rutile TiO 2. J Phys Chem Lett 2016; 7:3742-3746. [PMID: 27564137 PMCID: PMC5056403 DOI: 10.1021/acs.jpclett.6b01501] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 08/26/2016] [Indexed: 05/20/2023]
Abstract
In nanostructured thin films, photogenerated charge carriers can access the surface more easily than in dense films and thus react more readily. However, the high surface area of these films has also been associated with enhanced recombination losses via surface states. We herein use transient absorption spectroscopy to compare the ultrafast charge carrier kinetics in dense and nanostructured TiO2 films for its two most widely used polymorphs: anatase and rutile. We find that nanostructuring does not enhance recombination rates on ultrafast time scales, indicating that surface state mediated recombination is not a key loss pathway for either TiO2 polymorph. Rutile shows faster, and less intensity-dependent recombination than anatase, which we assign to its higher doping density. For both polymorphs, we conclude that bulk rather than surface recombination is the primary determinant of charge carrier lifetime.
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Affiliation(s)
- Michael Sachs
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.
| | - Ernest Pastor
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.
| | - Andreas Kafizas
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - James R. Durrant
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.
- E-mail:
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42
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Willkomm J, Orchard KL, Reynal A, Pastor E, Durrant JR, Reisner E. Dye-sensitised semiconductors modified with molecular catalysts for light-driven H2 production. Chem Soc Rev 2016; 45:9-23. [DOI: 10.1039/c5cs00733j] [Citation(s) in RCA: 248] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Recent progress and basic understanding in the emerging field of dye-sensitised photocatalysis for light-driven hydrogen production is reviewed.
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Affiliation(s)
- Janina Willkomm
- Christian Doppler Laboratory for Sustainable SynGas Chemistry
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
| | - Katherine L. Orchard
- Christian Doppler Laboratory for Sustainable SynGas Chemistry
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
| | - Anna Reynal
- School of Chemistry
- Newcastle University
- Newcastle Upon Tyne
- UK
| | - Ernest Pastor
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | | | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable SynGas Chemistry
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
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43
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Calderón J, García G, Querejeta A, Alcaide F, Calvillo L, Lázaro M, Rodríguez J, Pastor E. Carbon monoxide and methanol oxidations on carbon nanofibers supported Pt–Ru electrodes at different temperatures. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.121] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Schleder A, Pastor E, Planas E, Martins M. Experimental data and CFD performance for cloud dispersion analysis: The USP-UPC project. J Loss Prev Process Ind 2015. [DOI: 10.1016/j.jlp.2015.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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Bousquet J, Bourret R, Camuzat T, Augé P, Domy P, Bringer J, Best N, Jonquet O, de la Coussaye JE, Noguès M, Robine JM, Avignon A, Blain H, Combe B, Dray G, Dufour V, Fouletier M, Giraudeau N, Hève D, Jeandel C, Laffont I, Larrey D, Laune D, Laurent C, Mares P, Marion C, Pastor E, Pélissier JY, Radier-Pontal F, Reynes J, Royère E, Ychou M, Bedbrook A, Granier S, Abecassis F, Albert S, Adnet PA, Alomène B, Amouyal M, Arnavielhe S, Asteriou T, Attalin V, Aubas P, Azevedo C, Badin M, Bakhti, Baptista G, Bardy B, Battesti MP, Bénézet O, Bernard PL, Berr C, Berthe J, Bobia X, Bockaert J, Boegner C, Boichot S, Bonnin HY, Boulet P, Bouly S, Boubakri C, Bourdin A, Bourrain JL, Bourrel G, Bouix V, Breuker C, Bruguière V, Burille J, Cade S, Caimmi D, Calmels MV, Camu W, Canovas G, Carre V, Cavalli G, Cayla G, Chiron R, Claret PG, Coignard P, Coroian F, Costa DJ, Costa P, Cottalorda, Coulet B, Coupet AL, Courrouy-Michel MC, Courtet P, Cristol JP, Cros V, Cuisinier F, Daien C, Danko M, Dauenhauer P, Dauzat M, David M, Davy JM, Delignières D, Demoly P, Desplan J, Dhivert-Donnadieu H, Dujols P, Dupeyron A, Dupeyron G, Engberink O, Enjalbert M, Fattal C, Fernandes J, Fesler P, Fraisse P, Froger J, Gabrion P, Galano E, Gellerat-Rogier M, Gellis A, Goucham AY, Gouzi F, Gressard F, Gris JC, Guillot B, Guiraud D, Handweiler V, Hantkié H, Hayot M, Hérisson C, Heroum C, Hoa D, Jacquemin S, Jaber S, Jakovenko D, Jorgensen C, Journot L, Kaczorek M, Kouyoudjian P, Labauge P, Landreau L, Lapierre M, Leblond C, Léglise MS, Lemaitre JM, Le Moing V, Le Quellec A, Leclercq F, Lehmann S, Lognos B, Lussert JM, Makinson A, Mandrick K, Marmelat V, Martin-Gousset P, Matheron A, Mathieu G, Meissonnier M, Mercier G, Messner P, Meunier C, Mondain M, Morales R, Morel J, Morquin D, Mottet D, Nérin P, Nicolas P, Ninot G, Nouvel F, Ortiz JP, Paccard D, Pandraud G, Pasdelou MP, Pasquié JL, Patte K, Perrey S, Pers YM, Picot MC, Pin JP, Pinto N, Porte E, Portejoie F, Pujol JL, Quantin X, Quéré I, Raffort N, Ramdani S, Ribstein J, Rédini-Martinez I, Richard S, Ritchie K, Riso JP, Rivier F, Rolland C, Roubille F, Sablot D, Savy JL, Schifano L, Senesse P, Sicard R, Soua B, Stephan Y, Strubel D, Sultan A, Taddei-Ologeanu, Tallon G, Tanfin M, Tassery H, Tavares I, Torre K, Touchon J, Tribout V, Uziel A, Van de Perre P, Vasquez X, Verdier JM, Vergne-Richard C, Vergotte G, Vian L, Viarouge-Reunier C, Vialla F, Viart F, Villain M, Villiet M, Viollet E, Wojtusciszyn A, Aoustin M, Bourquin C, Mercier J. Introduction. Presse Med 2015; 44 Suppl 1:S1-5. [DOI: 10.1016/j.lpm.2015.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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46
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Laffont I, Jourdan C, Coroian F, Blain H, Carre V, Viollet E, Tavares I, Fattal C, Gelis A, Nouvel F, Bakhti K, Cros V, Patte K, Schifano L, Porte M, Galano E, Dray G, Fouletier M, Rivier F, Morales R, Labauge P, Camu W, Combe B, Morel J, Froger J, Coulet B, Cottalorda J, Kouyoumdjian P, Jonquet O, Landreau L, Bonnin HY, Hantkié O, Nicolas P, Enjalbert M, Leblond C, Soua B, Coignard P, Guiraud D, Azevedo C, Mottet D, Fraisse P, Pastor E, Mercier J, Bourret R, Bousquet J, Pélissier J, Bardy B, Herisson C, Dupeyron A. [Living Lab MACVIA. Disability]. Presse Med 2015; 44 Suppl 1:S60-9. [PMID: 26482491 DOI: 10.1016/j.lpm.2015.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- I Laffont
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France; Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France.
| | - C Jourdan
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France
| | - F Coroian
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France; Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France
| | - H Blain
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France; CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - V Carre
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France
| | - E Viollet
- CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France; CHU Carémeau, CEDMH, 30029 Nîmes, France
| | - I Tavares
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France
| | - C Fattal
- Association APPROCHE, CMRRF de Kerpape, BP 78, 56275 Ploemeur cedex, France
| | - A Gelis
- Centre Mutualiste Propara, 34000 Montpellier, France
| | - F Nouvel
- CHU Carémeau, CEDMH, 30029 Nîmes, France
| | - K Bakhti
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France; Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France
| | - V Cros
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France
| | - K Patte
- Institut Marin Saint-Pierre, 34250 Palavas les Flots, France
| | - L Schifano
- Institut Marin Saint-Pierre, 34250 Palavas les Flots, France
| | - M Porte
- CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - E Galano
- CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - G Dray
- École des Mines d'Alès, 30100 Alès, France
| | | | - F Rivier
- CHU de Montpellier, centre de référence Grand Sud des maladies neuromusculaires, département de neuropédiatrie, 34090 Montpellier, France
| | - R Morales
- CHRU de Montpellier, département de neurologie, 34090 Montpellier, France
| | - P Labauge
- CHRU de Montpellier, département de neurologie, 34090 Montpellier, France
| | - W Camu
- CHRU de Montpellier, département de neurologie, 34090 Montpellier, France
| | - B Combe
- CHRU de Montpellier, département de rhumatologie, 34090 Montpellier, France
| | - J Morel
- CHRU de Montpellier, département de rhumatologie, 34090 Montpellier, France
| | - J Froger
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France; CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - B Coulet
- CHRU de Montpellier, département de chirurgie orthopédique, 34090 Montpellier, France
| | - J Cottalorda
- CHRU de Montpellier, département de chirurgie orthopédique et plastique infantile, 34090 Montpellier, France
| | - P Kouyoumdjian
- CHU Carémeau, département de chirurgie orthopédique, 30029 Nîmes, France
| | - O Jonquet
- CHRU de Montpellier, département de réanimation, 34090 Montpellier, France
| | - L Landreau
- CHRU de Montpellier, département de réanimation, 34090 Montpellier, France
| | - H-Y Bonnin
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France; CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - O Hantkié
- Centre Bourgès, groupe Oc Santé, 34173 Castelneau-le-lez cedex, France
| | - P Nicolas
- Centre Bourgès, groupe Oc Santé, 34173 Castelneau-le-lez cedex, France
| | - M Enjalbert
- Centre Bouffard-Vercelli, 66290 Cerbère, France; Association APPROCHE, CMRRF de Kerpape, BP 78, 56275 Ploemeur cedex, France
| | - C Leblond
- Centre Bouffard-Vercelli, 66290 Cerbère, France
| | - B Soua
- Association ADAGES, Les Fontaines d'Ô, 34000 Montpellier, France
| | - P Coignard
- Association APPROCHE, CMRRF de Kerpape, BP 78, 56275 Ploemeur cedex, France
| | - D Guiraud
- Université de Montpellier, laboratoire d'informatique, de robotique et de microélectronique de Montpellier, 34090 Montpellier, France; Institut national de recherche en informatique et en automatique, LIRMM, université de Montpellier, 34090 Montpellier, France
| | - C Azevedo
- Université de Montpellier, laboratoire d'informatique, de robotique et de microélectronique de Montpellier, 34090 Montpellier, France; Institut national de recherche en informatique et en automatique, LIRMM, université de Montpellier, 34090 Montpellier, France
| | - D Mottet
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France
| | - P Fraisse
- Université de Montpellier, laboratoire d'informatique, de robotique et de microélectronique de Montpellier, 34090 Montpellier, France
| | - E Pastor
- CCAS de Lattes, 34970 Lattes, France
| | - J Mercier
- CHRU de Montpellier, U1046 Inserm, université Montpellier 1, 34090 Montpellier, France
| | - R Bourret
- CHRU de Montpellier, Direction générale, 34090 Montpellier, France
| | | | - J Pélissier
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France; CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - B Bardy
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France
| | - C Herisson
- CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France; Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France
| | - A Dupeyron
- Movement to Health (M2H), Euromov, université de Montpellier, Montpellier, France; CHU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France; CHU Carémeau, CEDMH, 30029 Nîmes, France
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Blain H, Léglise MS, Bernard PL, Dupeyron A, Pastor E, Strubel D, Akbaraly T, Abecassis F, Adnet PA, Alomène B, Amouyal M, Bardy B, Battesti MP, Baptista G, Boubakri C, Burille J, Calmels MV, Canovas G, Combe B, Delignières D, Dupeyron G, Engberink O, Gressard F, Heve D, Jakovenko D, Jeandel C, Lapierre M, Laffont I, Laurent C, Lognos B, Lussert JM, Mandrick K, Marmelat V, Martin-Gousset P, Matheron A, Mercier G, Meunier C, Morel J, Ninot G, Nouvel F, Pasdelou MP, Pélissier JY, Perrey S, Picot MC, Pinto N, Raffort N, Ramdani S, Radier-Pontal F, Royère E, Rédini-Martinez I, Robine JM, Roux E, Savy JL, Stephan Y, Tallon G, Torre K, Verdier JM, Vergotte G, Viollet E, Bedbrook A, Granier S, Camuzat T, Bourret R, Jonquet O, de la Coussaye JE, Noguès M, Aoustin M, Domy P, Bringer J, Mercier J, Bousquet J. [Living Lab MACVIA-LR. Equilibrium and the prevention of falls]. Presse Med 2015; 44 Suppl 1:S23-30. [PMID: 26482487 DOI: 10.1016/j.lpm.2015.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- H Blain
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France; Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France.
| | - M-S Léglise
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - P-L Bernard
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France; Université de Montpellier, UFR-Staps, 34090 Montpellier, France
| | - A Dupeyron
- CHRU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - E Pastor
- Conseil régional de l'Ordre des masseurs kinésithérapeutes, Maison des professions libérales, 34000 Montpellier, France; L'ETAPE, pôle autonomie santé, CCAS de Lattes, 34970 Lattes, France
| | - D Strubel
- CHRU de Nîmes, département de gériatrie, 30029 Nîmes, France
| | - T Akbaraly
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - F Abecassis
- Fédération pharmaceutique méditerranéenne (FEDMED), 34320 Roujan, France
| | - P-A Adnet
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - B Alomène
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - M Amouyal
- Faculté de médecine de Montpellier, département de médecine générale, 34090 Montpellier, France
| | - B Bardy
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - M-P Battesti
- Agence régionale de santé, 34000 Montpellier, France
| | - G Baptista
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - C Boubakri
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - J Burille
- Société publique locale d'exploitation de Balaruc-les-Bains, 34540 Ballaruc les Bains, France
| | - M-V Calmels
- Centre communal d'action sociale, 34990 Juvignac, France
| | | | - B Combe
- CHRU de Montpellier, département de rhumatologie, 34090 Montpellier, France
| | - D Delignières
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - G Dupeyron
- CHRU de Nîmes, ARAMAV (Association réinsertion aveugles malvoyants), département d'ophtalmologie, 30029 Nîmes, France
| | - O Engberink
- Université Montpellier, EA4556 Epsylon, 34090 Montpellier, France
| | - F Gressard
- L'ETAPE, pôle autonomie santé, CCAS de Lattes, 34970 Lattes, France
| | - D Heve
- Agence régionale de santé, 34000 Montpellier, France
| | - D Jakovenko
- Union régionale des professions de soins infirmiers libéraux du Languedoc-Roussillon, Maison des professions libérales, 34000 Montpellier, France
| | - C Jeandel
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - M Lapierre
- CHRU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - I Laffont
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France; CHRU de Montpellier, département de médecine physique et de réadaptation, 34090 Montpellier, France
| | - C Laurent
- I2ML, Fondation Institut méditerranéen des métiers de la longévité, 30000 Nîmes, France
| | - B Lognos
- Faculté de médecine de Montpellier, département de médecine générale, 34090 Montpellier, France; Union départementale des professions de soins médecins libéraux, 34000 Montpellier, France
| | - J-M Lussert
- Centre communal d'action sociale (CCAS), 34730 Prades-Le-Lez, France
| | - K Mandrick
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - V Marmelat
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - P Martin-Gousset
- L'ETAPE, pôle autonomie santé, CCAS de Lattes, 34970 Lattes, France
| | - A Matheron
- Centre communal d'action sociale (CCAS), 34730 Prades-Le-Lez, France
| | - G Mercier
- CHRU de Montpellier, département de l'information médicale, unité médico-économie, 34090 Montpellier, France
| | - C Meunier
- L'ETAPE, pôle autonomie santé, CCAS de Lattes, 34970 Lattes, France; Agglomération de Montpellier, 34970 Lattes, France
| | - J Morel
- CHRU de Montpellier, département de rhumatologie, 34090 Montpellier, France
| | - G Ninot
- Université Montpellier, EA4556 Epsylon, 34090 Montpellier, France
| | - F Nouvel
- CHRU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France; Association française des ergothérapeutes français, 34160 Boisseron, France; CHRU de Nîmes, clinique du positionnement et de la mobilité, 30029 Nîmes, France
| | - M-P Pasdelou
- Centre communal d'action sociale, 34990 Juvignac, France
| | - J-Y Pélissier
- CHRU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - S Perrey
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - M-C Picot
- CHRU de Montpellier, département de santé publique, 34090 Montpellier, France
| | - N Pinto
- Caisse assurance retraite et santé au travail Languedoc-Roussillon (CARSAT-LR), 34000 Montpellier, France
| | - N Raffort
- Société publique locale d'exploitation de Balaruc-les-Bains, 34540 Ballaruc les Bains, France
| | - S Ramdani
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - F Radier-Pontal
- Conseil départemental de l'Ordre des pharmaciens, Maison des professions libérales, 34000 Montpellier, France
| | - E Royère
- Pôle de compétitivité Eurobiomed PAC-Languedoc-Roussillon, 34000 Marseille, France
| | | | - J-M Robine
- Inserm U 988, 75006 Paris, France; Inserm U 710, 34095 Montpellier cedex 05, France; École pratique des Hautes Études (EPHE), 75014 Paris, France
| | - E Roux
- Groupe des infirmières libérales, 30460 Lasalle, France
| | - J-L Savy
- Centre communal d'action sociale, 34990 Juvignac, France
| | - Y Stephan
- Université Montpellier, EA4556 Epsylon, 34090 Montpellier, France
| | - G Tallon
- CHRU de Montpellier, département de gériatrie, 34090 Montpellier, France
| | - K Torre
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - J-M Verdier
- Université Montpellier, EA4556 Epsylon, 34090 Montpellier, France; EPHE, Section des sciences de la vie et de la terre, 75014 Paris, France; Université Montpellier, UMR S 710, 34095 Montpellier cedex 05, France; Institut transdisciplinaire d'études du vieillissement, 34095 Montpellier cedex 05, France
| | - G Vergotte
- Université de Montpellier, EA 2991 Movement To Health, Euromov, 34090 Montpellier, France
| | - E Viollet
- CHRU de Nîmes, hôpital Carémeau et du Grau du Roi, département de médecine physique et de réadaptation, 30029 Nîmes, France
| | - A Bedbrook
- BJ2. MACVIA-LR, contre les maladies chroniques pour un vieillissement actif en Languedoc-Roussillon, 34000 Montpellier, France
| | | | - T Camuzat
- Région Languedoc-Roussillon, 34000 Montpellier, France
| | - R Bourret
- CHRU de Montpellier, 34090 Montpellier, France
| | - O Jonquet
- CHRU de Montpellier, Commission médicale d'établissement, 34090 Montpellier, France
| | | | - M Noguès
- Caisse assurance retraite et santé au travail Languedoc-Roussillon (CARSAT-LR), 34000 Montpellier, France
| | - M Aoustin
- Agence régionale de santé, 34000 Montpellier, France
| | - P Domy
- CHRU de Montpellier, 34090 Montpellier, France
| | - J Bringer
- Montpellier-Nîmes, faculté de médecine, 34090 Montpellier, France
| | - J Mercier
- Université Montpellier 1, 34090 Montpellier, France
| | - J Bousquet
- BJ2. MACVIA-LR, contre les maladies chroniques pour un vieillissement actif en Languedoc-Roussillon, 34000 Montpellier, France; CHRU de Montpellier, 34090 Montpellier, France
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Pastor E. Collaborative platform for evaluation of technical aids for autonomy in ecological situation: L’ETAPE, Pole Autonomie Santé, Lattes. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Matilla JM, Borrego H, Cueto A, Becerra P, Simon C, Cebollero M, Guijarro R, Pastor E, Muguruza I, Vicente S, Yuste MG, Members EMETNESEPAR. F-093DETECTION ON NEUROENDOCRINE LUNG TUMOURS BY SOMATOSTATIN RECEPTORS (SSTR2 AND SSTR5): IMPROVING THEIR DIAGNOSIS AND FOLLOW-UP. Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Reynal A, Pastor E, Gross MA, Selim S, Reisner E, Durrant JR. Unravelling the pH-dependence of a molecular photocatalytic system for hydrogen production. Chem Sci 2015; 6:4855-4859. [PMID: 28717491 PMCID: PMC5502398 DOI: 10.1039/c5sc01349f] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 05/27/2015] [Indexed: 11/25/2022] Open
Abstract
The electron-donating ability of the sacrificial agent and the protonation of the catalyst determine the optimum pH for hydrogen production.
Photocatalytic systems for the reduction of aqueous protons are strongly pH-dependent, but the origin of this dependency is still not fully understood. We have studied the effect of different degrees of acidity on the electron transfer dynamics and catalysis taking place in a homogeneous photocatalytic system composed of a phosphonated ruthenium tris(bipyridine) dye (RuP) and a nickel bis(diphosphine) electrocatalyst (NiP) in an aqueous ascorbic acid solution. Our approach is based on transient absorption spectroscopy studies of the efficiency of photo-reduction of RuP and NiP correlated with pH-dependent photocatalytic H2 production and the degree of catalyst protonation. The influence of these factors results in an observed optimum photoactivity at pH 4.5 for the RuP–NiP system. The electron transfer from photo-reduced RuP to NiP is efficient and independent of the pH value of the medium. At pH <4.5, the efficiency of the system is limited by the yield of RuP photo-reduction by the sacrificial electron donor, ascorbic acid. At pH >4.5, the efficiency of the system is limited by the poor protonation of NiP, which inhibits its ability to reduce protons to hydrogen. We have therefore developed a rational strategy utilising transient absorption spectroscopy combined with bulk pH titration, electrocatalytic and photocatalytic experiments to disentangle the complex pH-dependent activity of the homogenous RuP–NiP photocatalytic system, which can be widely applied to other photocatalytic systems.
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Affiliation(s)
- Anna Reynal
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK . .,School of Chemistry , Newcastle University , Newcastle Upon Tyne , NE1 7RU , UK .
| | - Ernest Pastor
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Manuela A Gross
- Christian Doppler Laboratory for Sustainable SynGas Chemistry , Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Shababa Selim
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable SynGas Chemistry , Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - James R Durrant
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
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