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Srivastava K, Jacobs TS, Ostendorp S, Jonker D, Brzesowsky FA, Susarrey-Arce A, Gardeniers H, Wilde G, Weckhuysen BM, van den Berg A, van der Stam W, Odijk M. Alternative nano-lithographic tools for shell-isolated nanoparticle enhanced Raman spectroscopy substrates. NANOSCALE 2024; 16:7582-7593. [PMID: 38506088 PMCID: PMC11025715 DOI: 10.1039/d4nr00428k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/13/2024] [Indexed: 03/21/2024]
Abstract
Chemically synthesized metal nanoparticles (MNPs) have been widely used as surface-enhanced Raman spectroscopy (SERS) substrates for monitoring catalytic reactions. In some applications, however, the SERS MNPs, besides being plasmonically active, can also be catalytically active and result in Raman signals from undesired side products. The MNPs are typically insulated with a thin (∼3 nm), in principle pin-hole-free shell to prevent this. This approach, which is known as shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS), offers many advantages, such as better thermal and chemical stability of the plasmonic nanoparticle. However, having both a high enhancement factor and ensuring that the shell is pin-hole-free is challenging because there is a trade-off between the two when considering the shell thickness. So far in the literature, shell insulation has been successfully applied only to chemically synthesized MNPs. In this work, we alternatively study different combinations of chemical synthesis (bottom-up) and lithographic (top-down) routes to obtain shell-isolated plasmonic nanostructures that offer chemical sensing capabilities. The three approaches we study in this work include (1) chemically synthesized MNPs + chemical shell, (2) lithographic substrate + chemical shell, and (3) lithographic substrate + atomic layer deposition (ALD) shell. We find that ALD allows us to fabricate controllable and reproducible pin-hole-free shells. We showcase the ability to fabricate lithographic SHINER substrates which report an enhancement factor of 7.5 × 103 ± 17% for our gold nanodot substrates coated with a 2.8 nm aluminium oxide shell. Lastly, by introducing a gold etchant solution to our fabricated SHINER substrate, we verified that the shells fabricated with ALD are truly pin-hole-free.
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Affiliation(s)
- Ketki Srivastava
- BIOS Lab on Chip Group, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands.
| | - Thimo S Jacobs
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, The Netherlands.
| | | | - Dirk Jonker
- Mesoscale Chemical Systems, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands
| | - Floor A Brzesowsky
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, The Netherlands.
| | - Arturo Susarrey-Arce
- Mesoscale Chemical Systems, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands
| | - Han Gardeniers
- Mesoscale Chemical Systems, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands
| | - Gerhard Wilde
- Institute of Materials Physics, University of Münster, Germany
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, The Netherlands.
| | - Albert van den Berg
- BIOS Lab on Chip Group, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands.
| | - Ward van der Stam
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, The Netherlands.
| | - Mathieu Odijk
- BIOS Lab on Chip Group, Mesa+ Institute of Nanotechnology, University of Twente, The Netherlands.
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2
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Ezendam S, Gargiulo J, Sousa-Castillo A, Lee JB, Nam YS, Maier SA, Cortés E. Spatial Distributions of Single-Molecule Reactivity in Plasmonic Catalysis. ACS NANO 2024; 18:451-460. [PMID: 37971988 PMCID: PMC10786159 DOI: 10.1021/acsnano.3c07833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/19/2023]
Abstract
Plasmonic catalysts have the potential to accelerate and control chemical reactions with light by exploiting localized surface plasmon resonances. However, the mechanisms governing plasmonic catalysis are not simple to decouple. Several plasmon-derived phenomena, such as electromagnetic field enhancements, temperature, or the generation of charge carriers, can affect the reactivity of the system. These effects are convoluted with the inherent (nonplasmonic) catalytic properties of the metal surface. Disentangling these coexisting effects is challenging but is the key to rationally controlling reaction pathways and enhancing reaction rates. This study utilizes super-resolution fluorescence microscopy to examine the mechanisms of plasmonic catalysis at the single-particle level. The reduction reaction of resazurin to resorufin in the presence of Au nanorods coated with a porous silica shell is investigated in situ. This allows the determination of reaction rates with a single-molecule sensitivity and subparticle resolution. By variation of the irradiation wavelength, it is possible to examine two different regimes: photoexcitation of the reactant molecules and photoexcitation of the nanoparticle's plasmon resonance. In addition, the measured spatial distribution of reactivity allows differentiation between superficial and far-field effects. Our results indicate that the reduction of resazurin can occur through more than one reaction pathway, being most efficient when the reactant is photoexcited and is in contact with the Au surface. In addition, it was found that the spatial distribution of enhancements varies, depending on the underlying mechanism. These findings contribute to the fundamental understanding of plasmonic catalysis and the rational design of future plasmonic nanocatalysts.
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Affiliation(s)
- Simone Ezendam
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Julian Gargiulo
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Ana Sousa-Castillo
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Joong Bum Lee
- Department
of Materials Science and Engineering, Korea
Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yoon Sung Nam
- Department
of Materials Science and Engineering, Korea
Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Stefan A. Maier
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
- Department
of Physics, Imperial College London, London SW7 2AZ, United Kingdom
- School
of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
| | - Emiliano Cortés
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
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3
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Lomonosov V, Wayman TMR, Hopper ER, Ivanov YP, Divitini G, Ringe E. Plasmonic magnesium nanoparticles decorated with palladium catalyze thermal and light-driven hydrogenation of acetylene. NANOSCALE 2023; 15:7420-7429. [PMID: 36988987 PMCID: PMC10134437 DOI: 10.1039/d3nr00745f] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Bimetallic Pd-Mg nanoparticles were synthesized by partial galvanic replacement of plasmonic Mg nanoparticles, and their catalytic and photocatalytic properties in selective hydrogenation of acetylene have been investigated. Electron probe studies confirm that the Mg-Pd structures mainly consist of metallic Mg and sustain several localized plasmon resonances across a broad wavelength range. We demonstrate that, even without light excitation, the Pd-Mg nanostructures exhibit an excellent catalytic activity with selectivity to ethylene of 55% at 100% acetylene conversion achieved at 60 °C. With laser excitation at room temperature over a range of intensities and wavelengths, the initial reaction rate increased up to 40 times with respect to dark conditions and a 2-fold decrease of the apparent activation energy was observed. A significant wavelength-dependent change in hydrogenation kinetics strongly supports a catalytic behavior affected by plasmon excitation. This report of coupling between Mg's plasmonic and Pd's catalytic properties paves the way for sustainable catalytic structures for challenging, industrially relevant selective hydrogenation processes.
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Affiliation(s)
- Vladimir Lomonosov
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK
| | - Thomas M R Wayman
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK
| | - Elizabeth R Hopper
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, UK
| | - Yurii P Ivanov
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Giorgio Divitini
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Emilie Ringe
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK
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4
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Pinheiro Araújo T, Mondelli C, Agrachev M, Zou T, Willi PO, Engel KM, Grass RN, Stark WJ, Safonova OV, Jeschke G, Mitchell S, Pérez-Ramírez J. Flame-made ternary Pd-In2O3-ZrO2 catalyst with enhanced oxygen vacancy generation for CO2 hydrogenation to methanol. Nat Commun 2022; 13:5610. [PMID: 36153333 PMCID: PMC9509363 DOI: 10.1038/s41467-022-33391-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/15/2022] [Indexed: 11/28/2022] Open
Abstract
Palladium promotion and deposition on monoclinic zirconia are effective strategies to boost the performance of bulk In2O3 in CO2-to-methanol and could unlock superior reactivity if well integrated into a single catalytic system. However, harnessing synergic effects of the individual components is crucial and very challenging as it requires precise control over their assembly. Herein, we present ternary Pd-In2O3-ZrO2 catalysts prepared by flame spray pyrolysis (FSP) with remarkable methanol productivity and improved metal utilization, surpassing their binary counterparts. Unlike established impregnation and co-precipitation methods, FSP produces materials combining low-nuclearity palladium species associated with In2O3 monolayers highly dispersed on the ZrO2 carrier, whose surface partially transforms from a tetragonal into a monoclinic-like structure upon reaction. A pioneering protocol developed to quantify oxygen vacancies using in situ electron paramagnetic resonance spectroscopy reveals their enhanced generation because of this unique catalyst architecture, thereby rationalizing its high and sustained methanol productivity. Assembling multicomponent catalysts to harness synergic effects is challenging. Now, flame spray pyrolysis permits the synthesis of ternary Pd-In2O3-ZrO2 catalysts with an optimal architecture and an enriched density of oxygen vacancies for maximal performance in CO2-based methanol synthesis.
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5
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Ibáñez D, Begoña González-García M, Busto J, Pérez-Junquera A, Hernández-Santos D, Fanjul-Bolado P. Development of a novel Raman cell for the easy handling of spectroelectrochemical measurements. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Schumacher L, Weyel J, Hess C. Unraveling the Active Vanadium Sites and Adsorbate Dynamics in VO x/CeO 2 Oxidation Catalysts Using Transient IR Spectroscopy. J Am Chem Soc 2022; 144:14874-14887. [PMID: 35917149 DOI: 10.1021/jacs.2c06303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidative dehydrogenation (ODH) of propane over supported vanadia catalysts is an attractive route toward propene (propylene) with the potential of industrial application and has been extensively studied over decades. Despite numerous mechanistic studies, the active vanadyl site of the reaction has not been elucidated. In this work, we unravel the ODH reaction mechanism, including the nuclearity-dependent vanadyl and surface dynamics, over ceria-supported vanadia (VOx/CeO2) catalysts by applying (isotopic) modulation excitation IR spectroscopy supported by operando Raman and UV-vis spectroscopies. Based on our loading-dependent analysis, we were able to identify two different mechanisms leading to propylene, which are characterized by isopropyl- and acrylate-like intermediates. The modulation excitation IR approach also allows for the determination of the time evolution of the vanadia, hydroxyl, and adsorbate dynamics, underlining the intimate interplay between the surface vanadia species and the ceria support. Our results highlight the potential of transient IR spectroscopy to provide a detailed understanding of reaction mechanisms in oxidation catalysis and the dynamics of surface catalytic processes in general.
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Affiliation(s)
- Leon Schumacher
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Jakob Weyel
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Christian Hess
- Eduard Zintl Institute of Inorganic and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
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7
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Applications of in-situ wide spectral range infrared absorption spectroscopy for CO oxidation over Pd/SiO2 and Cu/SiO2 catalysts. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)64054-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Ashtari-Jafari S, Jamshidi Z, Visscher L. Efficient simulation of resonance Raman spectra with tight-binding approximations to Density Functional Theory. J Chem Phys 2022; 157:084104. [DOI: 10.1063/5.0107220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Resonance Raman spectroscopy has long been established as one of the most sensitive techniques for detection, structure characterization and probing the excited-state dynamics of biochemical systems. However, the analysis of resonance Raman spectra is much facilitated when measurements are accompanied by Density Functional Theory (DFT) calculations which are expensive for large biomolecules. In this work, resonance Raman spectra are therefore computed with the Density Functional Tight-Binding (DFTB) method in the time-dependent excited-state gradient approximation. To test the accuracy of the tight-binding approximations, this method is first applied to typical resonance Raman benchmark molecules like β-carotene and compared to results obtained with pure and range-separated exchange-correlation (xc) functionals. We then demonstrate the efficiency of the approach by considering a computationally challenging heme variation. Overall, we find that the vibrational frequencies and excited-state properties (energies and gradients) which are needed to simulate the spectra are reasonably accurate and suitable for interpretation of experiments. We can therefore recommend DFTB as a fast computational method to interpret resonance Raman spectra.
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Affiliation(s)
- Sahar Ashtari-Jafari
- Chemistry & Chemical Engineering Research Center of Iran (CCERCI), Iran, Islamic Republic of
| | - Zahra Jamshidi
- Chemistry, Sharif University of Technology, Iran, Islamic Republic of
| | - Lucas Visscher
- Division of Theoretical Chemistry, Vrije Universiteit Amsterdam, Netherlands
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9
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Liu Y, Li J, Das A, Kim H, Jones LO, Ma Q, Bedzyk MJ, Schatz GC, Kratish Y, Marks TJ. Synthesis and Structure-Activity Characterization of a Single-Site MoO 2 Catalytic Center Anchored on Reduced Graphene Oxide. J Am Chem Soc 2021; 143:21532-21540. [PMID: 34914390 DOI: 10.1021/jacs.1c07236] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Molecularly derived single-site heterogeneous catalysts can bridge the understanding and performance gaps between conventional homogeneous and heterogeneous catalysis, guiding the rational design of next-generation catalysts. While impressive advances have been made with well-defined oxide supports, the structural complexity of other supports and the nature of the grafted surface species present an intriguing challenge. In this study, single-site Mo(═O)2 species grafted onto reduced graphene oxide (rGO/MoO2) are characterized by XPS, DRIFTS, powder XRD, N2 physisorption, NH3-TPD, aqueous contact angle, active site poisoning assay, Mo EXAFS, model compound single-crystal XRD, DFT, and catalytic performance. NH3-TPD reveals that the anchored MoO2 moiety is not strongly acidic, while Mo 3d5/2 XPS assigns the oxidation state as Mo(VI), and XRD shows little rGO periodicity change on MoO2 grafting. Contact angle analysis shows that MoO2 grafting consumes rGO surface polar groups, yielding a more hydrophobic surface. The rGO/MoO2 DRIFTS assigns features at 959 and 927 cm-1 to the symmetric and antisymmetric Mo═O stretching modes, respectively, of an isolated cis-(O═Mo═O) moiety, in agreement with DFT computation. Moreover, the Mo EXAFS rGO/MoO2 structural data are consistent with isolated (C-O)2-Mo(═O)2 species having two Mo═O bonds and two Mo-O bonds at distances of 1.69(3) and 1.90(3) Å, respectively. rGO/MoO2 is also more active than the previously reported AC/MoO2 catalyst, with reductive carbonyl coupling TOFs approaching 1.81 × 103 h-1. rGO/MoO2 is environmentally robust and multiply recyclable with 69 ± 2% of the Mo sites catalytically significant. Overall, rGO/MoO2 is a structurally well-defined and versatile single-site Mo(VI) dioxo heterogeneous catalytic system.
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Affiliation(s)
- Yiqi Liu
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Jiaqi Li
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Anusheela Das
- Department of Material Science and Engineering and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Hacksung Kim
- Center for Catalysis and Surface Science, Northwestern University, Evanston, Illinois 60208, United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Leighton O Jones
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Qing Ma
- DND-CAT, Northwestern Synchrotron Research Center at the Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Michael J Bedzyk
- Department of Material Science and Engineering and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - George C Schatz
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
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10
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In-situ and operando spectroscopies for the characterization of catalysts and of mechanisms of catalytic reactions. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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11
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Fan X, Wei P, Li G, Li M, Lan L, Hao Q, Qiu T. Manipulating Hot-Electron Injection in Metal Oxide Heterojunction Array for Ultrasensitive Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51618-51627. [PMID: 34674528 DOI: 10.1021/acsami.1c11977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Efficient photoinduced charge transfer (PICT) resonance is crucial to the surface-enhanced Raman scattering (SERS) performance of metal oxide substrates. Herein, we venture into the hot-electron injection strategy to achieve unprecedented enhanced PICT efficiency between substrates and molecules. A heterojunction array composed of plasmonic MoO2 and semiconducting WO3-x is designed to prove the concept. The plasmonic MoO2 generates intense localized surface plasmon resonance under illumination, which can generate near-field Raman enhancement as well as accompanied plasmon-induced hot-electrons. The hot-electron injection in direct interfacial charge transfer and plasmon-induced charge transfer process can effectively promote the PICT efficiency between substrates and molecules, achieving a record Raman enhancement factor among metal oxide substrates (2.12 × 108) and the ultrasensitive detection of target molecule down to 10-11 M. This work demonstrates the possibility of hot-electron manipulation to realize unprecedented Raman enhancement in metal oxides, offering a cutting-edge strategy to design high-performance SERS substrates.
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Affiliation(s)
- Xingce Fan
- School of Physics, Southeast University, Nanjing 211189, China
| | - Penghua Wei
- School of Physics, Southeast University, Nanjing 211189, China
| | - Guoqun Li
- School of Physics, Southeast University, Nanjing 211189, China
| | - Mingze Li
- School of Physics, Southeast University, Nanjing 211189, China
| | - Leilei Lan
- School of Physics, Southeast University, Nanjing 211189, China
| | - Qi Hao
- School of Physics, Southeast University, Nanjing 211189, China
| | - Teng Qiu
- School of Physics, Southeast University, Nanjing 211189, China
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12
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Rogg S, Hess C. CO2 as a soft oxidant for propane oxidative dehydrogenation: A mechanistic study using operando UV Raman spectroscopy. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101604] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Kostyukov AI, Snytnikov VN, Yelisseyev AP, Zhuzhgov AV, Kostyukova NY, Ishchenko AV, Cherepanova SV, Snytnikov VN. Synthesis, structure and optical properties of the laser synthesized Al2O3 nanopowders depending on the crystallite size and vaporization atmosphere. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.05.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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14
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15
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Green D, Roy P, Hall CR, Iuliano JN, Jones GA, Lukacs A, Tonge PJ, Meech SR. Excited State Resonance Raman of Flavin Mononucleotide: Comparison of Theory and Experiment. J Phys Chem A 2021; 125:6171-6179. [PMID: 34240863 DOI: 10.1021/acs.jpca.1c04063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Blue light absorbing flavoproteins play important roles in a variety of photobiological processes. Consequently, there have been numerous investigations of their excited state structure and dynamics, in particular by time-resolved vibrational spectroscopy. The isoalloxazine chromophore of the flavoprotein cofactors has been studied in detail by time-resolved Raman, lending it a benchmark status for mode assignments in excited electronic states of large molecules. However, detailed comparisons of calculated and measured spectra have proven challenging, as there are many more modes calculated than are observed, and the role of resonance enhancement is difficult to characterize in excited electronic states. Here we employ a recently developed approach due to Elles and co-workers ( J. Phys. Chem. A 2018, 122, 8308-8319) for the calculation of resonance-enhanced Raman spectra of excited states and apply it to the lowest singlet and triplet excited states of the isoalloxazine chromophore. There is generally good agreement between calculated and observed enhancements, which allows assignment of vibrational bands of the flavoprotein cofactors to be refined. However, some prominently enhanced bands are found to be absent from the calculations, suggesting the need for further development of the theory.
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Affiliation(s)
- Dale Green
- School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Palas Roy
- School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K
| | | | - James N Iuliano
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Garth A Jones
- School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Andras Lukacs
- Department of Biophysics, Medical School, University of Pecs, Szigeti ut 12, 7624 Pecs, Hungary
| | - Peter J Tonge
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Stephen R Meech
- School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K
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16
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Jin Y, Huo W, Zhang L, Li Y, Chen Q, Zhang X, Yang S, Nie H, Zhou X, Yang Z. NaBH 4-reduction induced tunable oxygen vacancies in LaNiO 2.7 to enhance the oxygen evolution reaction. Chem Commun (Camb) 2021; 57:7168-7171. [PMID: 34184690 DOI: 10.1039/d1cc02598h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tunable oxygen vacancies of LaNiO3 (LNO-Vo) are realized by theoretical prediction and the NaBH4-reduction approach. The LNO2.7 catalyst exhibits superior catalytic activity and long-term stability for water oxidation. Direct evidence of the active site center and the intermediates is observed from in situ Raman spectra and DFT calculations.
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Affiliation(s)
- Yuwei Jin
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Wenjing Huo
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Libin Zhang
- Hangzhou Electric Connector Factory, Hangzhou, 310052, China
| | - Yong Li
- College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Qianqian Chen
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Xiaodong Zhang
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Shuo Yang
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China. and College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Huagui Nie
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Xuemei Zhou
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
| | - Zhi Yang
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, P. R. China.
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17
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Chen H, Singhal G, Neubrech F, Liu R, Katz JS, Matteucci S, Arturo SG, Wasserman D, Giessen H, Braun PV. Measuring Molecular Diffusion Through Thin Polymer Films with Dual-Band Plasmonic Antennas. ACS NANO 2021; 15:10393-10405. [PMID: 34008953 DOI: 10.1021/acsnano.1c02701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A general and quantitative method to characterize molecular transport in polymers with good temporal and high spatial resolution, in complex environments, is an important need of the pharmaceutical, textile, and food and beverage packaging industries, and of general interest to the polymer science community. Here we show how the amplified infrared (IR) absorbance sensitivity provided by plasmonic nanoantenna-based surface enhanced infrared absorption (SEIRA) provides such a method. SEIRA enhances infrared (IR) absorbances primarily within 50 nm of the nanoantennas, enabling localized quantitative detection of even trace quantities of analytes and diffusion measurements in even thin polymer films. Relative to a commercial attenuated total internal reflection (ATR) system, the limit of detection is enhanced at least 13-fold, and as is important for measuring diffusion, the detection volume is about 15 times thinner. Via this approach, the diffusion coefficient and solubility of specific molecules, including l-ascorbic acid (vitamin C), ethanol, various sugars, and water, in both simple and complex mixtures (e.g., beer and a cola soda), were determined in poly(methyl methacrylate), high density polyethylene (HDPE)-based, and polypropylene-based polyolefin films as thin as 250 nm.
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Affiliation(s)
- Hao Chen
- Department of Material Science and Engineering, Materials Research Laboratory, and Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Gaurav Singhal
- Department of Material Science and Engineering, Materials Research Laboratory, and Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Frank Neubrech
- 2nd Physics Institute, Stuttgart University, Pfaffenwaldring 57, 70569 Stuttgart, Germany
- Max-Planck-Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Runyu Liu
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Joshua S Katz
- Formulation Science, Corporate Research and Development, The Dow Chemical Company, Collegeville, Pennsylvania 19426, United States
| | - Scott Matteucci
- Formulation Science, Corporate Research and Development, The Dow Chemical Company, Midland, Michigan 48674, United States
| | - Steven G Arturo
- Engineering and Process Sciences, Corporate Research and Development, The Dow Chemical Company, Collegeville, Pennsylvania 19426, United States
| | - Daniel Wasserman
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Harald Giessen
- 2nd Physics Institute, Stuttgart University, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Paul V Braun
- Department of Material Science and Engineering, Materials Research Laboratory, and Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
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18
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Huo J, Tessonnier JP, Shanks BH. Improving Hydrothermal Stability of Supported Metal Catalysts for Biomass Conversions: A Review. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00197] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jiajie Huo
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, United States
| | - Jean-Philippe Tessonnier
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, United States
| | - Brent H. Shanks
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, United States
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19
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Juneau A, Frenette M. Raman Spectra of Persistent Radical Anions from Benzophenone, Fluorenone, 2,2'-Bipyridyl, 4,4'-Di- tert-butyl-2,2'-dipyridyl, and Anthracene: Excellent Agreement between DFT and Experiment for Highly Delocalized Radical Systems. J Phys Chem B 2021; 125:1595-1603. [PMID: 33544614 DOI: 10.1021/acs.jpcb.0c04742] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report detailed Raman spectra for the neutral and radical anion forms of benzophenone, fluorenone, 2,2'-bipyridyl, 4,4'-di-tert-butyl-2,2'-dipyridyl, and anthracene. Density functional theory (DFT) predictions for the Raman spectra of these molecules give additional insight into the assignment of each vibrational mode. While the use of DFT has been problematic in quantifying the thermochemistry of highly delocalized radicals, we find that DFT-predicted spectra using the popular B3LYP functional are in excellent agreement with the observed Raman spectra. In the case of the two bipyridyl compounds, the Raman spectra allowed us to conclude that the cis form of the radical anion complexed to a sodium cation was the preferred configuration. Benzophenone and fluorenone radical anions gave a significantly weakened C═O bond stretching vibrational frequency as expected from the population of an antibonding π* orbital. For benzophenone, the C═O vibration dropped from 1659 to 1403 cm-1 upon reduction. Similarly, fluorenone showed a C═O vibration observed at 1719 cm-1 for the neutral form that decreased to 1522 cm-1 for the radical anion. The structurally rigid anthracene showed relatively smaller Raman band shifts upon single-electron reduction as the π* orbital is more equally delocalized on the entire structure. In total, we correlated 65 DFT-predicted vibrational modes for the neutral molecules with an overall error of 7.1 cm-1 (root-mean-square errors (RMSEs)) and 67 DFT-predicted vibrational modes for radical anions with an overall error of 9.9 cm-1. These comparisons between theory and experiment are another example to demonstrate the power of DFT in predicting the identity and geometry of molecules using Raman spectroscopy.
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Affiliation(s)
- Antoine Juneau
- Département de Chimie, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Mathieu Frenette
- Département de Chimie, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
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20
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Kranz C, Wächtler M. Characterizing photocatalysts for water splitting: from atoms to bulk and from slow to ultrafast processes. Chem Soc Rev 2021; 50:1407-1437. [DOI: 10.1039/d0cs00526f] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This review provides a comprehensive overview on characterisation techniques for light-driven redox-catalysts highlighting spectroscopic, microscopic, electrochemical and spectroelectrochemical approaches.
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Affiliation(s)
- Christine Kranz
- Ulm University
- Institute of Analytical and Bioanalytical Chemistry
- 89081 Ulm
- Germany
| | - Maria Wächtler
- Leibniz Institute of Photonic Technology
- Department Functional Interfaces
- 07745 Jena
- Germany
- Friedrich Schiller University Jena
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21
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Hess C. New advances in using Raman spectroscopy for the characterization of catalysts and catalytic reactions. Chem Soc Rev 2021; 50:3519-3564. [PMID: 33501926 DOI: 10.1039/d0cs01059f] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gaining insight into the mode of operation of heterogeneous catalysts is of great scientific and economic interest. Raman spectroscopy has proven its potential as a powerful vibrational spectroscopic technique for a fundamental and molecular-level characterization of catalysts and catalytic reactions. Raman spectra provide important insight into reaction mechanisms by revealing specific information on the catalysts' (defect) structure in the bulk and at the surface, as well as the presence of adsorbates and reaction intermediates. Modern Raman instrumentation based on single-stage spectrometers allows high throughput and versatility in design of in situ/operando cells to study working catalysts. This review highlights major advances in the use of Raman spectroscopy for the characterization of heterogeneous catalysts made during the past decade, including the development of new methods and potential directions of research for applying Raman spectroscopy to working catalysts. The main focus will be on gas-solid catalytic reactions, but (photo)catalytic reactions in the liquid phase will be touched on if it appears appropriate. The discussion begins with the main instrumentation now available for applying vibrational Raman spectroscopy to catalysis research, including in situ/operando cells for studying gas-solid catalytic processes. The focus then moves to the different types of information available from Raman spectra in the bulk and on the surface of solid catalysts, including adsorbates and surface depositions, as well as the use of theoretical calculations to facilitate band assignments and to describe (resonance) Raman effects. This is followed by a presentation of major developments in enhancing the Raman signal of heterogeneous catalysts by use of UV resonance Raman spectroscopy, surface-enhanced Raman spectroscopy (SERS), and shell-isolated nanoparticle surface-enhanced Raman spectroscopy (SHINERS). The application of time-resolved Raman studies to structural and kinetic characterization is then discussed. Finally, recent developments in spatially resolved Raman analysis of catalysts and catalytic processes are presented, including the use of coherent anti-Stokes Raman spectroscopy (CARS) and tip-enhanced Raman spectroscopy (TERS). The review concludes with an outlook on potential future developments and applications of Raman spectroscopy in heterogeneous catalysis.
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Affiliation(s)
- Christian Hess
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287, Darmstadt, Germany.
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22
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Takele WM, Piatkowski L, Wackenhut F, Gawinkowski S, Meixner AJ, Waluk J. Scouting for strong light-matter coupling signatures in Raman spectra. Phys Chem Chem Phys 2021; 23:16837-16846. [PMID: 34323915 DOI: 10.1039/d1cp01863a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong coupling between vibrational transitions and a vacuum field of a cavity mode leads to the formation of vibrational polaritons. These hybrid light-matter states have been widely explored because of their potential to control chemical reactivity. However, the possibility of altering Raman scattering through the formation of vibrational polaritons has been rarely reported. Here, we present the Raman scattering properties of different molecules under vibrational strong coupling conditions. The polariton states are clearly observed in the IR transmission spectra of the coupled system for benzonitrile and methyl salicylate in liquid phase and for polyvinyl acetate in a solid polymer film. However, none of the studied systems exhibits a signature of the polariton states in the Raman spectra. For the solid polymer film, we have used cavities with different layer structures to investigate the influence of vibrational strong coupling on the Raman spectra. The only scenario where alterations of the Raman spectra are observed is for a thin Ag layer being in direct contact with the polymer film. This shows that, even though the system is in the vibrational strong coupling regime, changes in the Raman spectra do not necessarily result from the strong coupling, but are caused by the surface enhancement effects.
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Affiliation(s)
- Wassie Mersha Takele
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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23
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Single Particle Approaches to Plasmon-Driven Catalysis. NANOMATERIALS 2020; 10:nano10122377. [PMID: 33260302 PMCID: PMC7761459 DOI: 10.3390/nano10122377] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 11/22/2022]
Abstract
Plasmonic nanoparticles have recently emerged as a promising platform for photocatalysis thanks to their ability to efficiently harvest and convert light into highly energetic charge carriers and heat. The catalytic properties of metallic nanoparticles, however, are typically measured in ensemble experiments. These measurements, while providing statistically significant information, often mask the intrinsic heterogeneity of the catalyst particles and their individual dynamic behavior. For this reason, single particle approaches are now emerging as a powerful tool to unveil the structure-function relationship of plasmonic nanocatalysts. In this Perspective, we highlight two such techniques based on far-field optical microscopy: surface-enhanced Raman spectroscopy and super-resolution fluorescence microscopy. We first discuss their working principles and then show how they are applied to the in-situ study of catalysis and photocatalysis on single plasmonic nanoparticles. To conclude, we provide our vision on how these techniques can be further applied to tackle current open questions in the field of plasmonic chemistry.
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24
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Yang C, Pei C, Luo R, Liu S, Wang Y, Wang Z, Zhao ZJ, Gong J. Strong Electronic Oxide-Support Interaction over In 2O 3/ZrO 2 for Highly Selective CO 2 Hydrogenation to Methanol. J Am Chem Soc 2020; 142:19523-19531. [PMID: 33156989 DOI: 10.1021/jacs.0c07195] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metal oxides are widely employed in heterogeneous catalysis, but it remains challenging to determine their exact structure and understand the reaction mechanisms at the molecular level due to their structural complexity, in particular for binary oxides. This paper describes the observation of the strong electronic interaction between In2O3 and monoclinic ZrO2 (m-ZrO2) by quasi-in-situ XPS experiments combined with theoretical studies, which leads to support-dependent methanol selectivity. In2O3/m-ZrO2 exhibits methanol selectivity up to 84.6% with a CO2 conversion of 12.1%. Moreover, at a wide range of temperatures, the methanol yield of In2O3/m-ZrO2 is much higher than that of In2O3/t-ZrO2 (t-: tetragonal), which is due to the high dispersion of the In-O-In structure over m-ZrO2 as determined by in situ Raman spectra. The electron transfer from m-ZrO2 to In2O3 is confirmed by XPS and DFT calculations and improves the electron density of In2O3, which promotes H2 dissociation and hydrogenation of formate intermediates to methanol. The concept of the electronic interaction between an oxide and a support provides guidelines to develop hydrogenation catalysts.
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Affiliation(s)
- Chengsheng Yang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Chunlei Pei
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Ran Luo
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Sihang Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Yanan Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Zhongyan Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Zhi-Jian Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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25
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Lezcano-Gonzalez I, Campbell E, Hoffman AEJ, Bocus M, Sazanovich IV, Towrie M, Agote-Aran M, Gibson EK, Greenaway A, De Wispelaere K, Van Speybroeck V, Beale AM. Insight into the effects of confined hydrocarbon species on the lifetime of methanol conversion catalysts. NATURE MATERIALS 2020; 19:1081-1087. [PMID: 32929250 DOI: 10.1038/s41563-020-0800-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
The methanol-to-hydrocarbons reaction refers collectively to a series of important industrial catalytic processes to produce either olefins or gasoline. Mechanistically, methanol conversion proceeds through a 'pool' of hydrocarbon species. For the methanol-to-olefins process, these species can be delineated broadly into 'desired' lighter olefins and 'undesired' heavier fractions that cause deactivation in a matter of hours. The crux in further catalyst optimization is the ability to follow the formation of carbonaceous species during operation. Here, we report the combined results of an operando Kerr-gated Raman spectroscopic study with state-of-the-art operando molecular simulations, which allowed us to follow the formation of hydrocarbon species at various stages of methanol conversion. Polyenes are identified as crucial intermediates towards formation of polycyclic aromatic hydrocarbons, with their fate determined largely by the zeolite topology. Notably, we provide the missing link between active and deactivating species, which allows us to propose potential design rules for future-generation catalysts.
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Affiliation(s)
- I Lezcano-Gonzalez
- Chemistry Department, University College London, London, UK.
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK.
| | - E Campbell
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - A E J Hoffman
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - M Bocus
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - I V Sazanovich
- Central Laser Facility, STFC, Research Complex at Harwell, Didcot, UK
| | - M Towrie
- Central Laser Facility, STFC, Research Complex at Harwell, Didcot, UK
| | - M Agote-Aran
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - E K Gibson
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
- School of Chemistry, University of Glasgow, Glasgow, UK
| | - A Greenaway
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - K De Wispelaere
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - V Van Speybroeck
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium.
| | - A M Beale
- Chemistry Department, University College London, London, UK.
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK.
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26
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Wu T, Lu Y, Liu J, Zhang S, Zhang X. In situ monitoring of catalytic reaction on single nanoporous gold nanowire with tuneable SERS and catalytic activity. Talanta 2020; 218:121181. [PMID: 32797927 DOI: 10.1016/j.talanta.2020.121181] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 01/16/2023]
Abstract
Single nanoporous gold nanowire was introduced as a tunable one-dimensional nano-sensor platform with both SERS and catalytic activity, and it precisely fit the requirement of materials for in situ SERS monitoring of plasmon-assisted catalytic reaction. The nanoporous gold nanowires exhibited much more "hot spots" on their surface and much better SPR effect than the smooth nanowires. We demonstrated that these nanowires could be used as a SERS substrate assuring the sensitivity and reproducibility of Raman signals. Besides, they could be applied as a kind of heterogeneous catalyst for in situ SERS monitoring of the plasmon-assisted catalytic reaction-reduction of p-nitrothiophenol (p-NTP) to p,p-dimercaptoazobenzene (DMAB) at their surface. The SERS and catalytic activity of the nanowires could be respectively optimized by adjusting their dealloying time, similar to the procedure of catalyst screening.
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Affiliation(s)
- Tianhao Wu
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing, 100084, PR China
| | - Yuexiang Lu
- Institute of Nuclear and New Energy Technology, Collaborative Innovation Centre of Advanced Nuclear Energy Technology, Tsinghua University, Beijing, 100084, PR China.
| | - Jie Liu
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing, 100084, PR China
| | - Sichun Zhang
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing, 100084, PR China
| | - Xinrong Zhang
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing, 100084, PR China
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27
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Dery S, Kim S, Feferman D, Mehlman H, Toste FD, Gross E. Site-dependent selectivity in oxidation reactions on single Pt nanoparticles. Phys Chem Chem Phys 2020; 22:18765-18769. [DOI: 10.1039/d0cp00642d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Site-dependent selectivity in oxidation reactions on Pt nanoparticles was identified by conducting IR nanospectroscopy measurements while using allyl-functionalized N-heterocyclic carbenes (allyl-NHCs) as probe molecules.
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Affiliation(s)
- Shahar Dery
- Institute of Chemistry and The Centre for Nanoscience and Nanotechnology
- The Hebrew University
- Jerusalem 91904
- Israel
| | - Suhong Kim
- Department of Chemistry
- University of California
- Berkeley
- USA
| | - Daniel Feferman
- Institute of Chemistry and The Centre for Nanoscience and Nanotechnology
- The Hebrew University
- Jerusalem 91904
- Israel
| | - Hillel Mehlman
- Institute of Chemistry and The Centre for Nanoscience and Nanotechnology
- The Hebrew University
- Jerusalem 91904
- Israel
| | - F. Dean Toste
- Department of Chemistry
- University of California
- Berkeley
- USA
| | - Elad Gross
- Institute of Chemistry and The Centre for Nanoscience and Nanotechnology
- The Hebrew University
- Jerusalem 91904
- Israel
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28
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Gao Y, Nie W, Wang X, Fan F, Li C. Advanced space- and time-resolved techniques for photocatalyst studies. Chem Commun (Camb) 2020; 56:1007-1021. [DOI: 10.1039/c9cc07128h] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nanoparticle photocatalysts present the obvious characteristic of heterogeneity in structure, energy, and function at spatial and temporal scales.
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Affiliation(s)
- Yuying Gao
- State Key Laboratory of Catalysis
- Dalian National Laboratory for Clean Energy
- The Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
| | - Wei Nie
- State Key Laboratory of Catalysis
- Dalian National Laboratory for Clean Energy
- The Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
| | - Xiuli Wang
- State Key Laboratory of Catalysis
- Dalian National Laboratory for Clean Energy
- The Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
| | - Fengtao Fan
- State Key Laboratory of Catalysis
- Dalian National Laboratory for Clean Energy
- The Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
| | - Can Li
- State Key Laboratory of Catalysis
- Dalian National Laboratory for Clean Energy
- The Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
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29
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Application of Raman Spectroscopy to Working Gas Sensors: From in situ to operando Studies. SENSORS 2019; 19:s19235075. [PMID: 31757112 PMCID: PMC6929105 DOI: 10.3390/s19235075] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/06/2019] [Accepted: 11/16/2019] [Indexed: 11/16/2022]
Abstract
Understanding the mode of operation of gas sensors is of great scientific and economic interest. A knowledge-based approach requires the development and application of spectroscopic tools to monitor the relevant surface and bulk processes under working conditions (operando approach). In this review we trace the development of vibrational Raman spectroscopy applied to metal-oxide gas sensors, starting from initial applications to very recent operando spectroscopic approaches. We highlight the potential of Raman spectroscopy for molecular-level characterization of metal-oxide gas sensors to reveal important mechanistic information, as well as its versatility regarding the design of in situ/operando cells and the combination with other techniques. We conclude with an outlook on potential future developments.
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30
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Chen Z, Jiang S, Kang G, Nguyen D, Schatz GC, Van Duyne RP. Operando Characterization of Iron Phthalocyanine Deactivation during Oxygen Reduction Reaction Using Electrochemical Tip-Enhanced Raman Spectroscopy. J Am Chem Soc 2019; 141:15684-15692. [DOI: 10.1021/jacs.9b07979] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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31
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Guan Y, Wang Z, Gu P, Wang Y, Zhang W, Zhang G. An in situ SERS study of plasmonic nanochemistry based on bifunctional "hedgehog-like" arrays. NANOSCALE 2019; 11:9422-9428. [PMID: 31038523 DOI: 10.1039/c9nr01297d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An in situ SERS (surface-enhanced Raman scattering) study of plasmonic nanochemistry is realized on hierarchical Ag nanocone arrays ("hedgehog-like" arrays, denoted as HLAs) without any conventional catalyst. Ag nanocones are designed on 3D polystyrene (PS) microsphere arrays to provide a high density of hot spots within the laser-illumination area. Both experiments and numerical simulations demonstrate that the remarkable SERS and plasmonic catalytic performance of HLAs arise from the improved utilization rate of irradiation light in the third dimension and the tip enhancement effect of the nanocone arrays. On further combining their inherent SERS and catalytic properties, the in situ SERS study of plasmon-induced photocatalytic degradation reactions is realized. In this paper, not only the decomposition of methylene blue (MB) molecules is observed, but also the detailed molecular mechanisms of the reactions are revealed. Based on the bifunctional properties of the membrane-material interface, the HLAs are believed to be promising candidates in SERS and in situ SERS studies.
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Affiliation(s)
- Yuduo Guan
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P.R. China.
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32
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Fang C, Zhao G, Zhang Z, Ding Q, Yu N, Cui Z, Bi T. AuPt Bipyramid Nanoframes as Multifunctional Platforms for In Situ Monitoring of the Reduction of Nitrobenzene and Enhanced Electrocatalytic Methanol Oxidation. Chemistry 2019; 25:7351-7358. [DOI: 10.1002/chem.201900403] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Caihong Fang
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Guili Zhao
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Zijun Zhang
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Qian Ding
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Nan Yu
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Zhiqing Cui
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
| | - Ting Bi
- College of Chemistry and Materials ScienceThe Key Laboratory of Functional Molecular Solids, Ministry of EducationAnhui Laboratory of Molecular-Based MaterialsAnhui Normal University Wuhu in Anhui Province 241000 P.R. China
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Kumar N, Wondergem CS, Wain AJ, Weckhuysen BM. In Situ Nanoscale Investigation of Catalytic Reactions in the Liquid Phase Using Zirconia-Protected Tip-Enhanced Raman Spectroscopy Probes. J Phys Chem Lett 2019; 10:1669-1675. [PMID: 30916970 PMCID: PMC6477806 DOI: 10.1021/acs.jpclett.8b02496] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Tip-enhanced Raman spectroscopy (TERS) is a promising technique that enables nondestructive and label-free topographical and chemical imaging at the nanoscale. However, its scope for in situ characterization of catalytic reactions in the liquid phase has remained limited due to the lack of durable and chemically inert plasmonically active TERS probes. Herein, we present novel zirconia-protected TERS probes with 3 orders of magnitude increase in lifetime under ambient conditions compared to unprotected silver-coated probes, together with high stability in liquid media. Employing the plasmon-assisted oxidation of p-aminothiophenol as a model reaction, we demonstrate that the highly robust, durable, and chemically inert zirconia-protected TERS probes can be successfully used for nanoscale spatially resolved characterization of a photocatalytic reaction within an aqueous environment. The reported improved lifetime and stability of probes in a liquid environment extend the potential scope of TERS as a nanoanalytical tool not only to heterogeneous catalysis but also to a range of scientific disciplines in which dynamic solid-liquid interfaces play a defining role.
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Affiliation(s)
- Naresh Kumar
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
- National
Physical Laboratory, Hampton Road, Teddington, TW11 0LW, United Kingdom
| | - Caterina S. Wondergem
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Andrew J. Wain
- National
Physical Laboratory, Hampton Road, Teddington, TW11 0LW, United Kingdom
| | - Bert M. Weckhuysen
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
- E-mail:
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Pilot R, Signorini R, Durante C, Orian L, Bhamidipati M, Fabris L. A Review on Surface-Enhanced Raman Scattering. BIOSENSORS 2019; 9:E57. [PMID: 30999661 PMCID: PMC6627380 DOI: 10.3390/bios9020057] [Citation(s) in RCA: 307] [Impact Index Per Article: 61.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 12/23/2022]
Abstract
Surface-enhanced Raman scattering (SERS) has become a powerful tool in chemical, material and life sciences, owing to its intrinsic features (i.e., fingerprint recognition capabilities and high sensitivity) and to the technological advancements that have lowered the cost of the instruments and improved their sensitivity and user-friendliness. We provide an overview of the most significant aspects of SERS. First, the phenomena at the basis of the SERS amplification are described. Then, the measurement of the enhancement and the key factors that determine it (the materials, the hot spots, and the analyte-surface distance) are discussed. A section is dedicated to the analysis of the relevant factors for the choice of the excitation wavelength in a SERS experiment. Several types of substrates and fabrication methods are illustrated, along with some examples of the coupling of SERS with separation and capturing techniques. Finally, a representative selection of applications in the biomedical field, with direct and indirect protocols, is provided. We intentionally avoided using a highly technical language and, whenever possible, intuitive explanations of the involved phenomena are provided, in order to make this review suitable to scientists with different degrees of specialization in this field.
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Affiliation(s)
- Roberto Pilot
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
- Consorzio INSTM, via G. Giusti 9, 50121 Firenze, Italy.
| | - Raffaella Signorini
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
- Consorzio INSTM, via G. Giusti 9, 50121 Firenze, Italy.
| | - Christian Durante
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
- Consorzio INSTM, via G. Giusti 9, 50121 Firenze, Italy.
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
- Consorzio INSTM, via G. Giusti 9, 50121 Firenze, Italy.
| | - Manjari Bhamidipati
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, NJ 08854, USA.
| | - Laura Fabris
- Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, USA.
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35
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Kumar N, Weckhuysen BM, Wain AJ, Pollard AJ. Nanoscale chemical imaging using tip-enhanced Raman spectroscopy. Nat Protoc 2019; 14:1169-1193. [PMID: 30911174 DOI: 10.1038/s41596-019-0132-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 01/09/2019] [Indexed: 11/09/2022]
Abstract
Confocal and surface-enhanced Raman spectroscopy (SERS) are powerful techniques for molecular characterization; however, they suffer from the drawback of diffraction-limited spatial resolution. Tip-enhanced Raman spectroscopy (TERS) overcomes this limitation and provides chemical information at length scales in the tens of nanometers. In contrast to alternative approaches to nanoscale chemical analysis, TERS is label free, is non-destructive, and can be performed in both air and liquid environments, allowing its use in a diverse range of applications. Atomic force microscopy (AFM)-based TERS is especially versatile, as it can be applied to a broad range of samples on various substrates. Despite its advantages, widespread uptake of this technique for nanoscale chemical imaging has been inhibited by various experimental challenges, such as limited lifetime, and the low stability and yield of TERS probes. This protocol details procedures that will enable researchers to reliably perform TERS imaging using a transmission-mode AFM-TERS configuration on both biological and non-biological samples. The procedure consists of four stages: (i) preparation of plasmonically active TERS probes; (ii) alignment of the TERS system; (iii) experimental procedures for nanoscale imaging using TERS; and (iv) TERS data processing. We provide procedures and example data for a range of different sample types, including polymer thin films, self-assembled monolayers (SAMs) of organic molecules, photocatalyst surfaces, small molecules within biological cells, single-layer graphene and single-walled carbon nanotubes in both air and water. With this protocol, TERS probes can be prepared within ~23 h, and each subsequent TERS experimental procedure requires 3-5 h.
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Affiliation(s)
- Naresh Kumar
- National Physical Laboratory, Teddington, UK.,Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
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36
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Ma J, Zhang X, Phillips DL. Time-Resolved Spectroscopic Observation and Characterization of Water-Assisted Photoredox Reactions of Selected Aromatic Carbonyl Compounds. Acc Chem Res 2019; 52:726-737. [PMID: 30742408 DOI: 10.1021/acs.accounts.8b00619] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In recent years, unusual and efficient self-photoredox reactions were detected for selected benzophenone derivatives (BPs) and anthraquinone derivatives (AQs) in aqueous environments by Wan and co-workers, where the carbonyl undergoes reduction to the corresponding alcohol and a side-chain alcohol group undergoes oxidation to the corresponding carbonyl. To unravel the photoredox reaction mechanisms of these types of BPs and AQs in aqueous environments, we have utilized a combination of time-resolved spectroscopy techniques such as femtosecond transient absorption, nanosecond transient absorption, and nanosecond time-resolved resonance Raman spectroscopy to detect and characterize the electronic absorption and vibrational spectra of the intermediates and transient species from the femtosecond to microsecond time region after they are generated in the photoredox reactions. With the assistance of density functional theory calculations to simulate the electronic absorption and Raman spectra, the structural and kinetic information on the key reactive intermediates is described. Furthermore, the reaction pathways were calculated by finding the transition states connecting with the reactant and product complexes to better understand the photoredox reaction mechanism. In this Account, we summarize some of our time-resolved spectroscopic observations and characterization of water-assisted photoredox reactions of selected BPs and AQs. In the strong hydrogen-donor solvent isopropanol, the commonly studied photoreduction reaction for aromatic carbonyls via an intermolecular hydrogen atom tranfer process was observed for BPs and AQs. The photoredox reactions for the investigated BPs and AQs in aqueous environments occur on the triplet excited-state surface. Under moderately acidic aqueous conditions, the photoredox reactions for BPs and AQs are triggered by a proton transfer (PT) pathway. In neutral aqueous solutions, AQs may also undergo proton-coupled electron transfer (PCET) leading to the photoredox reaction, while BPs generate the ketyl radical species. Both BPs and AQs prefer the photohydration reaction in high-proton-concentration aqueous solutions (pH 0). The PT and PCET processes were found to offer more possibilities for the aromatic carbonyl compounds to lead to new photochemical reactions like the unusual photoredox reactions associated with BPs and AQs described here. Clear characterization of the photophysical pathways and the photochemical reactions of representative aromatic carbonyl compounds in aqueous environments not only provides fundamental information to better understand the photochemistry of carbonyl-containing compounds but also will facilitate the development of applications of these systems, like photochemical synthesis, drugs, and photolabile protecting groups. In addition, the importance of water molecules in the photochemical reactions of interest here may also lead to further understanding of how water influences the photochemistry of related carbonyl-containing compounds in aqueous environments.
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Affiliation(s)
- Jiani Ma
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Xiting Zhang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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Gaur A, Hartmann Dabros TM, Høj M, Boubnov A, Prüssmann T, Jelic J, Studt F, Jensen AD, Grunwaldt JD. Probing the Active Sites of MoS2 Based Hydrotreating Catalysts Using Modulation Excitation Spectroscopy. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04778] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Abhijeet Gaur
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
| | - Trine Marie Hartmann Dabros
- Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Kgs. Lyngby, DK-2800 Denmark
| | - Martin Høj
- Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Kgs. Lyngby, DK-2800 Denmark
| | - Alexey Boubnov
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
| | - Tim Prüssmann
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
| | - Jelena Jelic
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
| | - Felix Studt
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
| | - Anker Degn Jensen
- Department of Chemical and Biochemical Engineering, Technical University of Denmark (DTU), Kgs. Lyngby, DK-2800 Denmark
| | - Jan-Dierk Grunwaldt
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
- Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Karlsruhe, D-76131 Germany
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38
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Li X, Teschner D, Streibel V, Lunkenbein T, Masliuk L, Fu T, Wang Y, Jones T, Seitz F, Girgsdies F, Rosowski F, Schlögl R, Trunschke A. How to control selectivity in alkane oxidation? Chem Sci 2018; 10:2429-2443. [PMID: 30881671 PMCID: PMC6385647 DOI: 10.1039/c8sc04641g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 12/20/2018] [Indexed: 11/21/2022] Open
Abstract
The bulk crystal structure of an oxidation catalyst as the most popular descriptor in oxidation catalysis is not solely responsible for catalytic performance.
The well-defined particle morphology of crystalline MnWO4 catalysts investigated in the present study facilitates obtaining insight into the origin of selectivity limitations in alkane oxidation. Hydrothermal synthesis at variable pH values granted access to a series of phase-pure MnWO4 catalysts with particles ranging from cube-like (aspect ratio 1.5) to rod- or needle-like (aspect ratio 6.8) shapes. Kinetic studies reveal a strong dependence of the propane consumption rate on the particle shape. The true origin of the structure sensitivity was unraveled by comprehensive bulk and surface analysis using nitrogen adsorption, XRD, SEM, ADF-STEM, STEM-EELS, XPS, multi-laser excitation Raman and DRIFT/operando FTIR spectroscopies, temperature-programmed oxidation (TPO), in situ NEXAFS, and DFT calculations. The active phase is composed of a thin manganese oxy-hydroxide layer formed on the surface of crystalline MnWO4. The differences in catalytic performance within the series clearly illustrate that the structural motif as the most popular descriptor in oxidation catalysis is not essential, since all MnWO4 catalysts in the series under study exhibit the same bulk crystal structure and bulk chemical composition and are phase pure and homogenous. The variable particle shape serves as a proxy that reflects the formation of varying abundance of redox active Mn2+/Mn3+ surface sites, which correlates with catalytic activity. Operando FTIR spectroscopy directly confirms the formation of Mn–OH surface species by abstraction of hydrogen atoms from the propane molecule on nucleophilic oxygen atoms and suggests that active site regeneration occurs via oxidative dehydrogenation of Mn–OH species indicating a single-site nature of the active sites that does not allow four-electron reduction of molecular oxygen. Instead, intermediates are created that cause side reactions and lower the selectivity. The findings highlight fundamental design criteria that may be applied to advance the development of new alkane oxidation catalysts with improved selectivity.
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Affiliation(s)
- Xuan Li
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457.,UniCat-BASF Joint Lab , Technische Universität Berlin , Sekr. EW K 01, Hardenbergstraße 36 , 10623 Berlin , Germany
| | - Detre Teschner
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457.,Department of Heterogeneous Reactions , Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim a. d. Ruhr , Germany
| | - Verena Streibel
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Thomas Lunkenbein
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Liudmyla Masliuk
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Teng Fu
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Yuanqing Wang
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457.,UniCat-BASF Joint Lab , Technische Universität Berlin , Sekr. EW K 01, Hardenbergstraße 36 , 10623 Berlin , Germany
| | - Travis Jones
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Friedrich Seitz
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Frank Girgsdies
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
| | - Frank Rosowski
- UniCat-BASF Joint Lab , Technische Universität Berlin , Sekr. EW K 01, Hardenbergstraße 36 , 10623 Berlin , Germany.,BASF SE , Process Research and Chemical Engineering , Heterogeneous Catalysis , Carl-Bosch-Straße 38 , 67056 Ludwigshafen , Germany
| | - Robert Schlögl
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457.,Department of Heterogeneous Reactions , Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim a. d. Ruhr , Germany
| | - Annette Trunschke
- Department of Inorganic Chemistry , Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , 14195 Berlin , Germany . ; Tel: +49 30 8413 4457
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39
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Kang L, Guo Y, Miao P, Sun M, Song B, Xu P, Liu X. Study of Surface Plasmon Assisted Reactions to Understand the Light‐Induced Decarboxylation of N719 Sensitizer. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800893] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Leilei Kang
- School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China
- Dalian Institute of Chemical Physics 116023 Dalian China
| | - Yan Guo
- School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China
| | - Peng Miao
- School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China
| | - Mengtao Sun
- School of Mathematics and Physics University of Science and Technology Beijing 100083 Beijing China
| | - Bo Song
- School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China
| | - Ping Xu
- School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China
| | - Xiaoyan Liu
- Dalian Institute of Chemical Physics 116023 Dalian China
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40
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Clark ML, Ge A, Videla PE, Rudshteyn B, Miller CJ, Song J, Batista VS, Lian T, Kubiak CP. CO2 Reduction Catalysts on Gold Electrode Surfaces Influenced by Large Electric Fields. J Am Chem Soc 2018; 140:17643-17655. [DOI: 10.1021/jacs.8b09852] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Melissa L. Clark
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, United States
| | - Aimin Ge
- Department of Chemistry, Emory University, 1515 Dickey Drive, Northeast, Atlanta, Georgia 30322, United States
| | - Pablo E. Videla
- Department of Chemistry and Energy Sciences Institute, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Benjamin Rudshteyn
- Department of Chemistry and Energy Sciences Institute, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Christopher J. Miller
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, United States
| | - Jia Song
- Department of Chemistry, Emory University, 1515 Dickey Drive, Northeast, Atlanta, Georgia 30322, United States
| | - Victor S. Batista
- Department of Chemistry and Energy Sciences Institute, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, 1515 Dickey Drive, Northeast, Atlanta, Georgia 30322, United States
| | - Clifford P. Kubiak
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, United States
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41
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Limo MJ, Sola-Rabada A, Boix E, Thota V, Westcott ZC, Puddu V, Perry CC. Interactions between Metal Oxides and Biomolecules: from Fundamental Understanding to Applications. Chem Rev 2018; 118:11118-11193. [PMID: 30362737 DOI: 10.1021/acs.chemrev.7b00660] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Metallo-oxide (MO)-based bioinorganic nanocomposites promise unique structures, physicochemical properties, and novel biochemical functionalities, and within the past decade, investment in research on materials such as ZnO, TiO2, SiO2, and GeO2 has significantly increased. Besides traditional approaches, the synthesis, shaping, structural patterning, and postprocessing chemical functionalization of the materials surface is inspired by strategies which mimic processes in nature. Would such materials deliver new technologies? Answering this question requires the merging of historical knowledge and current research from different fields of science. Practically, we need an effective defragmentation of the research area. From our perspective, the superficial accounting of material properties, chemistry of the surfaces, and the behavior of biomolecules next to such surfaces is a problem. This is particularly of concern when we wish to bridge between technologies in vitro and biotechnologies in vivo. Further, besides the potential practical technological efficiency and advantages such materials might exhibit, we have to consider the wider long-term implications of material stability and toxicity. In this contribution, we present a critical review of recent advances in the chemistry and engineering of MO-based biocomposites, highlighting the role of interactions at the interface and the techniques by which these can be studied. At the end of the article, we outline the challenges which hamper progress in research and extrapolate to developing and promising directions including additive manufacturing and synthetic biology that could benefit from molecular level understanding of interactions occurring between inanimate (abiotic) and living (biotic) materials.
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Affiliation(s)
- Marion J Limo
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Interface and Surface Analysis Centre, School of Pharmacy , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Anna Sola-Rabada
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Estefania Boix
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Department of Bioproducts and Biosystems , Aalto University , P.O. Box 16100, FI-00076 Aalto , Finland
| | - Veeranjaneyulu Thota
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Zayd C Westcott
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Valeria Puddu
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Carole C Perry
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
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42
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Li Z, Gao Y, Zhang L, Fang Y, Wang P. Polarization-dependent surface plasmon-driven catalytic reaction on a single nanowire monitored by SERS. NANOSCALE 2018; 10:18720-18727. [PMID: 30270366 DOI: 10.1039/c8nr06102e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The polarizing effect of an excitation laser on a plasmon-driven catalytic reaction on a single nanowire (NW) was investigated experimentally and theoretically. The dimerization of 4-nitrobenzenethiol (4NBT) to p,p'-dimercaptoazobenzene (DMAB) due to localized surface plasmon resonance (LSPR) was realized and monitored via surface enhanced Raman scattering (SERS). The SERS signal degradation has been compensated by using different equivalent points on the NW. It was shown that the SERS signals of both the reactant and product were sensitive to the angles (θ) between the longitude of the NW and the polarization direction of the excitation laser. When the polarization is along the transverse direction of the NW, the SERS signals are drastically enhanced by the LSPR. The efficiency of the plasmon-driven catalytic reaction increased significantly. The mechanism of the polarization-dependent plasmon-driven catalytic reaction was revealed by our dark field experiment and numerical finite-difference time-domain simulation. It was demonstrated that the maximum intensity of the electric field near the surface of the NW would also be a function of the angle θ. The theoretical and experimental results were consistent with each other. This research may pave a way for controlling plasmon-driven catalytic reactions by changing the polarization of an excitation laser incident on single anisotropic nanostructures such as a single NW.
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Affiliation(s)
- Ze Li
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Department of Physics, Capital Normal University, Beijing 100048, China.
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Curtis T, Taylor AK, Alden SE, Swanson C, Lo J, Knight L, Silva A, Gates BD, Emory SR, Rider DA. Synthesis and Characterization of Tunable, pH-Responsive Nanoparticle-Microgel Composites for Surface-Enhanced Raman Scattering Detection. ACS OMEGA 2018; 3:10572-10588. [PMID: 31459181 PMCID: PMC6645554 DOI: 10.1021/acsomega.8b01561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/21/2018] [Indexed: 05/19/2023]
Abstract
The synthesis of microgels with pH-tunable swelling leads to adjustable and pH-responsive substrates for surface-enhanced Raman scattering (SERS)-active nanoparticles (NPs). Sterically stabilized and cross-linked latexes were synthesized from random copolymers of styrene (S) and 2-vinylpyridine (2VP). The pH-dependent latex-to-microgel transition and swellability were tuned based on their hydrophobic-to-hydrophilic content established by the S/2VP ratio. The electrostatic loading of polystyrene/poly(2-vinylpyridine) microgels [PS x P2VP y (M)] with anions such as tetrachloroaurate (AuCl4 -) and borate-capped Ag NPs was quantified. The PS x P2VP y (M) can load ∼0.3 equiv of AuCl4 - and the subsequent photoreduction results in Au NP-loaded PS x P2VP y (M) with NPs located throughout the structure. Loading PS x P2VP y (M) with borate-capped Ag NPs produces PS x P2VP y (M) with NPs located on the surface of the microgels, where the Ag content is set by S/2VP. The pH-responsive SERS activity is also reported for these Ag NP-loaded microgels. Analytical enhancement factors for dissolved crystal violet are high (i.e., 109 to 1010) and are set by S/2VP. The Ag NP-loaded microgels with ∼80 wt % 2VP exhibited the most stable pH dependent response.
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Affiliation(s)
- Tyler Curtis
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Audrey K. Taylor
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Sasha E. Alden
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Christopher Swanson
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Joelle Lo
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Liam Knight
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Alyson Silva
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - Byron D. Gates
- Department
of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby V5A 1S6, Canada
| | - Steven R. Emory
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
| | - David A. Rider
- Chemistry
Department and Department of Engineering and Design, Western
Washington University, 516 High Street, Bellingham, Washington 98225, United States
- E-mail:
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44
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Nauert SL, Rosen AS, Kim H, Snurr RQ, Stair PC, Notestein JM. Evidence for Copper Dimers in Low-Loaded CuOx/SiO2 Catalysts for Cyclohexane Oxidative Dehydrogenation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott L. Nauert
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Andrew S. Rosen
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Hacksung Kim
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Department of Chemistry, Center for Catalysis and Surface Science, and Institute for Catalysis in Energy Processes, Northwestern University, Evanston, Illinois 60208, United States
| | - Randall Q. Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Peter C. Stair
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Department of Chemistry, Center for Catalysis and Surface Science, and Institute for Catalysis in Energy Processes, Northwestern University, Evanston, Illinois 60208, United States
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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45
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Rad I, Pollack GH. Cooling of Pure Water at Room Temperature by Weak Electric Currents. J Phys Chem B 2018; 122:7711-7717. [PMID: 29996049 DOI: 10.1021/acs.jpcb.7b12689] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Flow of electrical current through water is expected to increase water temperature. We passed low-frequency alternating electric current through distilled, deionized water using platinum electrodes and found, instead, a diminution of temperature. The diminution was observed using both an infrared camera and a spectroradiometer, the latter allowing us to obtain spectral information. The diminished temperature persisted for at least half an hour following cessation of the current flow. Diminished radiant energy implies reduced charge displacements, which in turn implies increased structural order. Hence, the passage of charge into water appears to increase the water structure.
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Affiliation(s)
- Iman Rad
- Department of Bioengineering , University of Washington , Box 355061, Seattle , Washington 98195 , United States.,Stem Cell Technology Research Center , Tehran 1997775555 , Iran
| | - Gerald H Pollack
- Department of Bioengineering , University of Washington , Box 355061, Seattle , Washington 98195 , United States
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46
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Abstract
UV Raman spectra were measured using a novel experimental configuration. This configuration allows many of the difficulties associated with UV excitation and high-power pulsed laser sources to be mitigated. Large sample areas are imaged into the detection system allowing high power excitation sources to be used while simultaneously avoiding sample degradation and multi-photon absorption effects. Such large detection areas allow large numbers of molecular scatters to be probed even with minimal penetration depth. Alignment issues between sample and collection optics are also simplified. Several common solvents were studied using 213 nm light and their spectra reported.
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Affiliation(s)
- Bradley R. Arnold
- Department of Chemistry and Biochemistry, University of Maryland Baltimore Country, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Christopher E. Cooper
- Department of Chemistry and Biochemistry, University of Maryland Baltimore Country, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Michael R. Matrona
- Department of Chemistry and Biochemistry, University of Maryland Baltimore Country, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Darren K. Emge
- Chemical Sciences Division, Edgewood Chemical and Biological Center, Aberdeen Proving Grounds, MD 21010-5424, USA
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47
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Sonkar PK, Yadav M, Prakash K, Ganesan V, Sankar M, Yadav DK, Gupta R. Electrochemical sensing of rifampicin in pharmaceutical samples using meso-tetrakis(4-hydroxyphenyl)porphyrinato cobalt(II) anchored carbon nanotubes. J APPL ELECTROCHEM 2018. [DOI: 10.1007/s10800-018-1221-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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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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49
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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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50
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Hartman T, Weckhuysen BM. Thermally Stable TiO 2 - and SiO 2 -Shell-Isolated Au Nanoparticles for In Situ Plasmon-Enhanced Raman Spectroscopy of Hydrogenation Catalysts. Chemistry 2018; 24:3733-3741. [PMID: 29388737 PMCID: PMC5873377 DOI: 10.1002/chem.201704370] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Indexed: 12/22/2022]
Abstract
Raman spectroscopy is known as a powerful technique for solid catalyst characterization as it provides vibrational fingerprints of (metal) oxides, reactants, and products. It can even become a strong surface-sensitive technique by implementing shell-isolated surface-enhanced Raman spectroscopy (SHINERS). Au@TiO2 and Au@SiO2 shell-isolated nanoparticles (SHINs) of various sizes were therefore prepared for the purpose of studying heterogeneous catalysis and the effect of metal oxide coating. Both SiO2 - and TiO2 -SHINs are effective SHINERS substrates and thermally stable up to 400 °C. Nano-sized Ru and Rh hydrogenation catalysts were assembled over the SHINs by wet impregnation of aqueous RuCl3 and RhCl3 . The substrates were implemented to study CO adsorption and hydrogenation under in situ conditions at various temperatures to illustrate the differences between catalysts and shell materials with SHINERS. This work demonstrates the potential of SHINS for in situ characterization studies in a wide range of catalytic reactions.
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Affiliation(s)
- Thomas Hartman
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
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