1
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Li Y, Wang N, Lei H, Li X, Zheng H, Wang H, Zhang W, Cao R. Bioinspired N4-metallomacrocycles for electrocatalytic oxygen reduction reaction. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213996] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Chaturvedi A, Williams CK, Devi N, Jiang JJ. Effects of Appended Poly(ethylene glycol) on Electrochemical CO 2 Reduction by an Iron Porphyrin Complex. Inorg Chem 2021; 60:3843-3850. [PMID: 33629857 DOI: 10.1021/acs.inorgchem.0c03612] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrochemical carbon dioxide (CO2) reduction is a sustainable approach for transforming atmospheric CO2 into chemical feedstocks and fuels. To overcome the kinetic barriers of electrocatalytic CO2 reduction, catalysts with high selectivity, activity, and stability are needed. Here, we report an iron porphyrin complex, FePEGP, with a poly(ethylene glycol) unit in the second coordination sphere, as a highly selective and active electrocatalyst for the electrochemical reduction of CO2 to carbon monoxide (CO). Controlled-potential electrolysis using FePEGP showed a Faradaic efficiency of 98% and a current density of -7.8 mA/cm2 at -2.2 V versus Fc/Fc+ in acetonitrile using water as the proton source. The maximum turnover frequency was calculated to be 1.4 × 105 s-1 using foot-of-the-wave analysis. Distinct from most other catalysts, the kinetic isotope effect (KIE) study revealed that the protonation step of the Fe-CO2 adduct is not involved in the rate-limiting step. This model shows that the PEG unit as the secondary coordination sphere enhances the catalytic kinetics and thus is an effective design for electrocatalytic CO2 reduction.
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Affiliation(s)
- Ashwin Chaturvedi
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati 45221, Ohio, United States
| | - Caroline K Williams
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati 45221, Ohio, United States
| | - Nilakshi Devi
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati 45221, Ohio, United States
| | - Jianbing Jimmy Jiang
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati 45221, Ohio, United States
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3
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Ly KH, Weidinger IM. Understanding active sites in molecular (photo)electrocatalysis through complementary vibrational spectroelectrochemistry. Chem Commun (Camb) 2021; 57:2328-2342. [DOI: 10.1039/d0cc07376h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting vibrational spectroelectrochemistry for the investigation of synthetic molecular (photo) electrocatalysts for key energy conversion reactions.
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Affiliation(s)
- Khoa H. Ly
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
| | - Inez M. Weidinger
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
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4
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Williams CK, Lashgari A, Tomb JA, Chai J, Jiang JJ. Atropisomeric Effects of Second Coordination Spheres on Electrocatalytic CO
2
Reduction. ChemCatChem 2020. [DOI: 10.1002/cctc.202000909] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Caroline K. Williams
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati, Ohio 45221-0172 USA
| | - Amir Lashgari
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati, Ohio 45221-0172 USA
| | - Jenny A. Tomb
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati, Ohio 45221-0172 USA
| | - Jingchao Chai
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati, Ohio 45221-0172 USA
| | - Jianbing Jimmy Jiang
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati, Ohio 45221-0172 USA
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5
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Heidary N, Morency M, Chartrand D, Ly KH, Iftimie R, Kornienko N. Electrochemically Triggered Dynamics within a Hybrid Metal–Organic Electrocatalyst. J Am Chem Soc 2020; 142:12382-12393. [DOI: 10.1021/jacs.0c04758] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Nina Heidary
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Mathieu Morency
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Daniel Chartrand
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Khoa H. Ly
- Fakultät Chemie und Lebensmittelchemie, Technische Universität Dresden, 01062 Dresden, Germany
| | - Radu Iftimie
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Nikolay Kornienko
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
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6
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Zhong H, Ghorbani-Asl M, Ly KH, Zhang J, Ge J, Wang M, Liao Z, Makarov D, Zschech E, Brunner E, Weidinger IM, Zhang J, Krasheninnikov AV, Kaskel S, Dong R, Feng X. Synergistic electroreduction of carbon dioxide to carbon monoxide on bimetallic layered conjugated metal-organic frameworks. Nat Commun 2020; 11:1409. [PMID: 32179738 PMCID: PMC7075876 DOI: 10.1038/s41467-020-15141-y] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 02/19/2020] [Indexed: 11/09/2022] Open
Abstract
Highly effective electrocatalysts promoting CO2 reduction reaction (CO2RR) is extremely desirable to produce value-added chemicals/fuels while addressing current environmental challenges. Herein, we develop a layer-stacked, bimetallic two-dimensional conjugated metal-organic framework (2D c-MOF) with copper-phthalocyanine as ligand (CuN4) and zinc-bis(dihydroxy) complex (ZnO4) as linkage (PcCu-O8-Zn). The PcCu-O8-Zn exhibits high CO selectivity of 88%, turnover frequency of 0.39 s-1 and long-term durability (>10 h), surpassing thus by far reported MOF-based electrocatalysts. The molar H2/CO ratio (1:7 to 4:1) can be tuned by varying metal centers and applied potential, making 2D c-MOFs highly relevant for syngas industry applications. The contrast experiments combined with operando spectroelectrochemistry and theoretical calculation unveil a synergistic catalytic mechanism; ZnO4 complexes act as CO2RR catalytic sites while CuN4 centers promote the protonation of adsorbed CO2 during CO2RR. This work offers a strategy on developing bimetallic MOF electrocatalysts for synergistically catalyzing CO2RR toward syngas synthesis.
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Affiliation(s)
- Haixia Zhong
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Mahdi Ghorbani-Asl
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Khoa Hoang Ly
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Jichao Zhang
- Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201204, Shanghai, China
| | - Jin Ge
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Mingchao Wang
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Zhongquan Liao
- Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Maria-Reiche-Strasse 2, 01109, Dresden, Germany
| | - Denys Makarov
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Ehrenfried Zschech
- Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Maria-Reiche-Strasse 2, 01109, Dresden, Germany
| | - Eike Brunner
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Inez M Weidinger
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Jian Zhang
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
- Department of Applied Chemistry, School of Applied and Natural Sciences, Northwestern Polytechnical University, 710129, Xi'an, China
| | - Arkady V Krasheninnikov
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076, Aalto, Finland
| | - Stefan Kaskel
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Renhao Dong
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (Cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
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7
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Sakaushi K, Kumeda T, Hammes-Schiffer S, Melander MM, Sugino O. Advances and challenges for experiment and theory for multi-electron multi-proton transfer at electrified solid–liquid interfaces. Phys Chem Chem Phys 2020; 22:19401-19442. [DOI: 10.1039/d0cp02741c] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Understanding microscopic mechanism of multi-electron multi-proton transfer reactions at complexed systems is important for advancing electrochemistry-oriented science in the 21st century.
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Affiliation(s)
- Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | - Tomoaki Kumeda
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | | | - Marko M. Melander
- Nanoscience Center
- Department of Chemistry
- University of Jyväskylä
- Jyväskylä
- Finland
| | - Osamu Sugino
- The Institute of Solid State Physics
- the University of Tokyo
- Chiba 277-8581
- Japan
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8
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Götz R, Ly KH, Wrzolek P, Dianat A, Croy A, Cuniberti G, Hildebrandt P, Schwalbe M, Weidinger IM. Influence of Mesityl and Thiophene Peripheral Substituents on Surface Attachment, Redox Chemistry, and ORR Activity of Molecular Iron Porphyrin Catalysts on Electrodes. Inorg Chem 2019; 58:10637-10647. [DOI: 10.1021/acs.inorgchem.9b00043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Robert Götz
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Khoa H. Ly
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Pierre Wrzolek
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Giancarlo Cuniberti
- Center for Advancing Electronics, Dresden Center for Computational Materials Science, Dresden University of Technology, 01062 Dresden, Germany
| | - Peter Hildebrandt
- Institute of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Matthias Schwalbe
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Inez M. Weidinger
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
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9
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Amanullah S, Singha A, Dey A. Tailor made iron porphyrins for investigating axial ligand and distal environment contributions to electronic structure and reactivity. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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11
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Adam SM, Wijeratne GB, Rogler PJ, Diaz DE, Quist DA, Liu JJ, Karlin KD. Synthetic Fe/Cu Complexes: Toward Understanding Heme-Copper Oxidase Structure and Function. Chem Rev 2018; 118:10840-11022. [PMID: 30372042 PMCID: PMC6360144 DOI: 10.1021/acs.chemrev.8b00074] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Heme-copper oxidases (HCOs) are terminal enzymes on the mitochondrial or bacterial respiratory electron transport chain, which utilize a unique heterobinuclear active site to catalyze the 4H+/4e- reduction of dioxygen to water. This process involves a proton-coupled electron transfer (PCET) from a tyrosine (phenolic) residue and additional redox events coupled to transmembrane proton pumping and ATP synthesis. Given that HCOs are large, complex, membrane-bound enzymes, bioinspired synthetic model chemistry is a promising approach to better understand heme-Cu-mediated dioxygen reduction, including the details of proton and electron movements. This review encompasses important aspects of heme-O2 and copper-O2 (bio)chemistries as they relate to the design and interpretation of small molecule model systems and provides perspectives from fundamental coordination chemistry, which can be applied to the understanding of HCO activity. We focus on recent advancements from studies of heme-Cu models, evaluating experimental and computational results, which highlight important fundamental structure-function relationships. Finally, we provide an outlook for future potential contributions from synthetic inorganic chemistry and discuss their implications with relevance to biological O2-reduction.
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Affiliation(s)
- Suzanne M. Adam
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Gayan B. Wijeratne
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Patrick J. Rogler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Daniel E. Diaz
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jeffrey J. Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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12
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Coordination chemistry of mononuclear ruthenium complexes bearing versatile 1,8-naphthyridine units: Utilization of specific reaction sites constructed by the secondary coordination sphere. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Neumann B, Götz R, Wrzolek P, Scheller FW, Weidinger IM, Schwalbe M, Wollenberger U. Enhancement of the Electrocatalytic Activity of Thienyl‐Substituted Iron Porphyrin Electropolymers by a Hangman Effect. ChemCatChem 2018. [DOI: 10.1002/cctc.201800934] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bettina Neumann
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
| | - Robert Götz
- Department of Chemistry and Food ChemistryTechnische Universität Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - Pierre Wrzolek
- Institute for ChemistryHumboldt-Universität zu Berlin Brook-Taylor-Str. 2 Berlin 12489 Germany
| | - Frieder W. Scheller
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
| | - Inez M. Weidinger
- Department of Chemistry and Food ChemistryTechnische Universität Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - Matthias Schwalbe
- Institute for ChemistryHumboldt-Universität zu Berlin Brook-Taylor-Str. 2 Berlin 12489 Germany
| | - Ulla Wollenberger
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
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14
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Öner IH, Querebillo CJ, David C, Gernert U, Walter C, Driess M, Leimkühler S, Ly KH, Weidinger IM. Hohe elektromagnetische Feldverstärkung in nanotubularen TiO2
-Elektroden. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802597] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ibrahim Halil Öner
- Professur für Elektrochemie; Technische Universität Dresden; 01062 Dresden Deutschland
| | - Christine Joy Querebillo
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Christin David
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanoscience); C/ Faraday 9 28049 Madrid Spanien
| | - Ulrich Gernert
- ZE Elektronenmikroskopie; Technische Universität Berlin, Sekr. KWT 2/ Abt. ZELMI; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Carsten Walter
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Matthias Driess
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Silke Leimkühler
- Molekulare Enzymologie; Universität Potsdam; Karl-Liebknecht-Str. 24, H25 14476 Potsdam Deutschland
| | - Khoa Hoang Ly
- Department of Chemistry; University of Cambridge; Lensfield Road CB2 1EW Cambridge Großbritannien
| | - Inez M. Weidinger
- Professur für Elektrochemie; Technische Universität Dresden; 01062 Dresden Deutschland
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15
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Öner IH, Querebillo CJ, David C, Gernert U, Walter C, Driess M, Leimkühler S, Ly KH, Weidinger IM. High Electromagnetic Field Enhancement of TiO 2 Nanotube Electrodes. Angew Chem Int Ed Engl 2018; 57:7225-7229. [PMID: 29573138 DOI: 10.1002/anie.201802597] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Indexed: 01/02/2023]
Abstract
We present the fabrication of TiO2 nanotube electrodes with high biocompatibility and extraordinary spectroscopic properties. Intense surface-enhanced resonance Raman signals of the heme unit of the redox enzyme Cytochrome b5 were observed upon covalent immobilization of the protein matrix on the TiO2 surface, revealing overall preserved structural integrity and redox behavior. The enhancement factor could be rationally controlled by varying the electrode annealing temperature, reaching a record maximum value of over 70 at 475 °C. For the first time, such high values are reported for non-directly surface-interacting probes, for which the involvement of charge-transfer processes in signal amplification can be excluded. The origin of the surface enhancement is exclusively attributed to enhanced localized electric fields resulting from the specific optical properties of the nanotubular geometry of the electrode.
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Affiliation(s)
- Ibrahim Halil Öner
- Professur für Elektrochemie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Christine Joy Querebillo
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Christin David
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanoscience), C/ Faraday 9, 28049, Madrid, Spain
| | - Ulrich Gernert
- ZE Elektronenmikroskopie, Technische Universität Berlin, Sekr. KWT 2/ Abt. ZELMI, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Carsten Walter
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Matthias Driess
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Silke Leimkühler
- Molecular Enzymology, University of Potsdam, Karl-Liebknecht-Str. 24, H25, 14476, Potsdam, Germany
| | - Khoa Hoang Ly
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK
| | - Inez M Weidinger
- Professur für Elektrochemie, Technische Universität Dresden, 01062, Dresden, Germany
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16
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Kielb P, Horch M, Wrzolek P, Goetz R, Ly KH, Kozuch J, Schwalbe M, Weidinger IM. Hydrogen evolution by cobalt hangman porphyrins under operating conditions studied by vibrational spectro-electrochemistry. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02253k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure of cobalt hangman complexes adsorbed on electrodes during HER was analysed via surface enhanced Raman spectroscopy.
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Affiliation(s)
- Patrycja Kielb
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
- Division of Chemistry and Chemical Engineering
| | - Marius Horch
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Pierre Wrzolek
- Department of Chemistry
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Robert Goetz
- Department of Chemistry and Food Chemistry
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Khoa H. Ly
- Department of Chemistry
- University of Cambridge
- Cambridge CB2 1EW
- UK
| | - Jacek Kozuch
- Department of Chemistry
- Stanford University
- Stanford
- USA
| | - Matthias Schwalbe
- Department of Chemistry
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Inez M. Weidinger
- Department of Chemistry and Food Chemistry
- Technische Universität Dresden
- 01062 Dresden
- Germany
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17
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Götz R, Ly HK, Wrzolek P, Schwalbe M, Weidinger IM. Surface enhanced resonance Raman spectroscopy of iron Hangman complexes on electrodes during electrocatalytic oxygen reduction: advantages and problems of common drycast methods. Dalton Trans 2017; 46:13220-13228. [PMID: 28682383 DOI: 10.1039/c7dt01174a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Drycast methods have been used frequently in recent decades to adsorb a range of synthetic catalysts on electrodes. The uncoordinated multilayers that are formed via this immobilization method can however have a strong impact on the electrocatalytic reaction pathway as slow electron transfer and intermolecular interactions can alter the chemistry of the catalysts on the surface. To gain insight into the structure of Fe porphyrin Hangman catalysts during electrocatalytic oxygen reduction a combination of electrochemistry and surface enhanced resonance Raman spectroscopy (SERRS) was applied. The Hangman complexes were attached to the electrodes via different methods and the influence of the immobilisation technique on oxygen chemistry was studied. In multilayer systems, new intermediates could be identified via potential dependent SERRS that were not present in solution or in monolayer systems under catalytic conditions. A comparison of Raman spectra obtained either via Soret or Q-band excitation showed that the porphyrin symmetry is strongly distorted under reducing conditions, which was interpreted by the transient formation of dimer complexes during catalysis.
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Affiliation(s)
- R Götz
- Fachbereich Chemie und Lebensmittelchemie, Technische Universitaet Dresden, 01062 Dresden, Germany.
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18
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Reuillard B, Ly KH, Rosser TE, Kuehnel MF, Zebger I, Reisner E. Tuning Product Selectivity for Aqueous CO 2 Reduction with a Mn(bipyridine)-pyrene Catalyst Immobilized on a Carbon Nanotube Electrode. J Am Chem Soc 2017; 139:14425-14435. [PMID: 28885841 PMCID: PMC5649446 DOI: 10.1021/jacs.7b06269] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
The
development of high-performance electrocatalytic systems for the controlled
reduction of CO2 to value-added chemicals is a key goal
in emerging renewable energy technologies. The lack of selective and
scalable catalysts in aqueous solution currently hampers the implementation
of such a process. Here, the assembly of a [MnBr(2,2′-bipyridine)(CO)3] complex anchored to a carbon nanotube electrode via a pyrene
unit is reported. Immobilization of the molecular catalyst allows
electrocatalytic reduction of CO2 under fully aqueous conditions
with a catalytic onset overpotential of η = 360 mV, and controlled
potential electrolysis generated more than 1000 turnovers at η
= 550 mV. The product selectivity can be tuned by alteration of the
catalyst loading on the nanotube surface. CO was observed as the main
product at high catalyst loadings, whereas formate was the dominant
CO2 reduction product at low catalyst loadings. Using UV–vis
and surface-sensitive IR spectroelectrochemical techniques, two different
intermediates were identified as responsible for the change in selectivity
of the heterogenized Mn catalyst. The formation of a dimeric Mn0 species at higher surface loading was shown to preferentially
lead to CO formation, whereas at lower surface loading the electrochemical
generation of a monomeric Mn-hydride is suggested to greatly enhance
the production of formate. These results emphasize the advantages
of integrating molecular catalysts onto electrode surfaces for enhancing
catalytic activity while allowing excellent control and a deeper understanding
of the catalytic mechanisms.
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Affiliation(s)
- Bertrand Reuillard
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Khoa H Ly
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Timothy E Rosser
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Moritz F Kuehnel
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Ingo Zebger
- Max Volmer Laboratorium für Biophysikalische Chemie, Sekretariat PC14, Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Wrzolek P, Wahl S, Schwalbe M. Electrocatalytic investigation on the water oxidation ability of a hangman complex based on the [Ru(tpy)(bpy)(OH 2 )] 2+ motif. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Oyama D, Yamanaka T, Abe R, Takase T. Ruthenium complexes bearing a tridentate polypyridyl ligand with non-coordinating donor atoms: Construction of a specific coordination environment involving noncovalent interactions. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ohta T, Nagaraju P, Liu JG, Ogura T, Naruta Y. The secondary coordination sphere and axial ligand effects on oxygen reduction reaction by iron porphyrins: a DFT computational study. J Biol Inorg Chem 2016; 21:745-55. [PMID: 27501847 DOI: 10.1007/s00775-016-1380-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 07/26/2016] [Indexed: 11/25/2022]
Abstract
Oxygen reduction reaction (ORR) catalyzed by a bio-inspired iron porphyrin bearing a hanging carboxylic acid group over the porphyrin ring, and a tethered axial imidazole ligand was studied by DFT calculations. BP86 free energy calculations of the redox potentials and pK a's of reaction components involved in the proton coupled electron transfer (PCET) reactions of the ferric-hydroxo and -superoxo complexes were performed based on Born-Haber thermodynamic cycle in conjunction with a continuum solvation model. The comparison was made with iron porphyrins that lack either in the hanging acid group or axial ligand, suggesting that H-bond interaction between the carboxylic acid and iron-bound hydroxo, aquo, superoxo, and peroxo ligands (de)stabilizes the Fe-O bonding, resulting in the increase in the reduction potential of the ferric complexes. The axial ligand interaction with the imidazole raises the affinity of the iron-bound superoxo and peroxo ligands for proton. In addition, a low-spin end-on ferric-hydroperoxo intermediate, a key precursor for O-O cleavage, can be stabilized in the presence of axial ligation. Thus, selective and efficient ORR of iron porphyrin can be achieved with the aid of the secondary coordination sphere and axial ligand interactions.
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Affiliation(s)
- Takehiro Ohta
- Picobiology Institute, Graduate School of Life Science, University of Hyogo, RSC-UH LP Center, Hyogo, 679-5148, Japan. .,Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 812-8581, Japan.
| | - Perumandla Nagaraju
- Institute of Science and Technology Research, Chubu University, Kasugai, Aichi, 487-8501, Japan.,Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 812-8581, Japan
| | - Jin-Gang Liu
- Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China
| | - Takashi Ogura
- Picobiology Institute, Graduate School of Life Science, University of Hyogo, RSC-UH LP Center, Hyogo, 679-5148, Japan
| | - Yoshinori Naruta
- Institute of Science and Technology Research, Chubu University, Kasugai, Aichi, 487-8501, Japan.,Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 812-8581, Japan
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