1
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Kalanur SS, Seetharamappa J, Sial QA, Pollet BG. State of the Art Progress in Copper Vanadate Materials for Solar Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2599. [PMID: 37764627 PMCID: PMC10538049 DOI: 10.3390/nano13182599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
The development of a single junction photoelectrode material having specific properties is essential and challenging for the efficient application in solar water splitting for oxygen production and a high value-added product, hydrogen. Moreover, the present material solutions based on binary metal oxides offer limited catalytic activity and hydrogen production efficiency. Therefore, it is paramount to develop and exploit a unique range of materials derived from ternary metal oxides with specifically engineered properties to advance in photoelectrochemical (PEC) water splitting. Among the ternary oxides, copper vanadates offer promising characteristics, such as a narrow bandgap and catalytic surface properties along with favorable band edges for facile oxygen evolution reaction (OER), which is considered the bottleneck step in performing overall water dissociation. Furthermore, the copper vanadates allow the tuning of the stoichiometry through which a wide range of polymorphs and materials could be obtained. This review provides a complete outlook on the range of copper vanadates and the established synthesis approach, morphology, crystal structure, band edge properties, and PEC characterizations. Mainly, the underlying charge dynamic properties, carrier path length, effect of doping, and influence of surface catalysts are discussed. The review concludes that the advancement toward obtaining low-bandgap materials is a main challenge to overcome the limitations for efficient water dissociation to OER and copper vanadates, which offer a promising solution with their unique properties and advantages. Importantly, intense and strategically focused research is vital to overcome the scientific challenges involved in copper vanadates and to explore and exploit new polymorphs to set new efficiency benchmarks and PEC water splitting solutions.
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Affiliation(s)
- Shankara S. Kalanur
- Green Hydrogen Lab (GH2Lab), Institute for Hydrogen Research (IHR), Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G9A 5H7, Canada
| | | | - Qadeer Akbar Sial
- Department of Advanced Materials Chemistry, Korea University, Sejong 339-700, Republic of Korea;
| | - Bruno G. Pollet
- Green Hydrogen Lab (GH2Lab), Institute for Hydrogen Research (IHR), Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, QC G9A 5H7, Canada
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2
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Rawat A, Clark L, Zhang C, Cavin J, Sangwan VK, Toth PS, Janáky C, Ananth R, Goldfine E, Bedzyk MJ, Weiss EA, Rondinelli JM, Hersam MC, Meletis EI, Rajeshwar K. Solution Combustion Synthesis and Characterization of Magnesium Copper Vanadates. Inorg Chem 2023; 62:8903-8913. [PMID: 37260199 PMCID: PMC10266371 DOI: 10.1021/acs.inorgchem.3c00452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Indexed: 06/02/2023]
Abstract
Magnesium vanadate (MgV2O6) and its alloys with copper vanadate were synthesized via the solution combustion technique. Phase purity and solid solution formation were confirmed by a variety of experimental techniques, supported by electronic structure simulations based on density functional theory (DFT). Powder X-ray diffraction combined with Rietveld refinement, laser Raman spectroscopy, diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy showed single-phase alloy formation despite the MgV2O6 and CuV2O6 end members exhibiting monoclinic and triclinic crystal systems, respectively. DFT-calculated optical band gaps showed close agreement in the computed optical bandgaps with experimentally derived values. Surface photovoltage spectroscopy, ambient-pressure photoemission spectroscopy, and Kelvin probe contact potential difference (work function) measurements confirmed a systematic variation in the optical bandgap modification and band alignment as a function of stoichiometry in the alloy composition. These data indicated n-type semiconductor behavior for all the samples which was confirmed by photoelectrochemical measurements.
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Affiliation(s)
- Abhishek Rawat
- Department
of Chemistry & Biochemistry, The University
of Texas at Arlington, Arlington, Texas 76019, United States
| | - Laura Clark
- Department
of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Chuzhong Zhang
- Department
of Materials Science and Engineering, The
University of Texas at Arlington, Arlington, Texas 76019, United States
| | - John Cavin
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Vinod K. Sangwan
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Peter S. Toth
- Department
of Physical Chemistry and Materials Science, University of Szeged, Rerrich Square 1, Szeged H-6720, Hungary
| | - Csaba Janáky
- Department
of Physical Chemistry and Materials Science, University of Szeged, Rerrich Square 1, Szeged H-6720, Hungary
| | - Riddhi Ananth
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Elise Goldfine
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Michael J. Bedzyk
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Emily A. Weiss
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - James M. Rondinelli
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Mark C. Hersam
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Efstathios I. Meletis
- Department
of Materials Science and Engineering, The
University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Krishnan Rajeshwar
- Department
of Chemistry & Biochemistry, The University
of Texas at Arlington, Arlington, Texas 76019, United States
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3
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Tripathi V, Jain S, Kabra D, Panchakarla LS, Dutta A. Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H 2 evolution and glycerol oxidation in alkaline water. NANOSCALE ADVANCES 2022; 5:237-246. [PMID: 36605804 PMCID: PMC9765594 DOI: 10.1039/d2na00724j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Strategically doped metal oxide nanomaterials signify a rapidly growing genre of functional materials with a wide range of practical applications. Copper vanadate (CuV) represents one such highly active system, which has been rarely explored following its doping with an abundant first-row transition metal. Here, we have developed a series of CuV samples with varying cobalt(ii) doping concentrations deploying a relatively simple solid state synthetic procedure. Among the samples, the 10% Co(ii)-doped CuV (Co10%-CuV) exhibited excellent reactivity for both the H2 evolution reaction (HER) and glycerol oxidation reaction (GOR) in an alkaline aqueous medium (pH 14.0) during cathodic and anodic scans, respectively. During this dual-active catalysis, surface-immobilized Co10%-CuV operates at exceptionally low overpotentials of 176 mV and 160 mV for the HER and GOR, respectively, while achieving 10 mA cm2 current density. The detailed spectroscopic analysis revealed the formation of formate as the major product during the GOR with a faradaic efficiency of >90%. Therefore, this Co10%-CuV can be included on either side of a two-electrode electrolyzer assembly to trigger a complete biomass-driven H2 production, establishing an ideal carbon-neutral energy harvest process.
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Affiliation(s)
- Vijay Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay Mumbai 400076 India
| | - Siddarth Jain
- Department of Chemistry, Indian Institute of Technology Bombay Mumbai 400076 India
| | - Dinesh Kabra
- Department of Physics, Indian Institute of Technology Bombay Mumbai 400076 India
| | - Leela S Panchakarla
- Department of Chemistry, Indian Institute of Technology Bombay Mumbai 400076 India
| | - Arnab Dutta
- Department of Chemistry, Indian Institute of Technology Bombay Mumbai 400076 India
- Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay Mumbai 400076 India
- National Center of Excellence in CCU, Indian Institute of Technology Bombay Mumbai 400076 India
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4
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Heteroepitaxial Growth of GaP Photocathode by Hydride Vapor Phase Epitaxy for Water Splitting and CO2 Reduction. Catalysts 2022. [DOI: 10.3390/catal12111482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Heteroepitaxial Zn-doped p-GaP was grown on (001) GaAs, (001) Si and (111) Si substrates by hydride vapor phase epitaxy for solar-driven photoelectrochemical applications of hydrogen generation by water splitting and CO2 reduction. Growth of GaP on Si was realized through the implementation of a low-temperature buffer layer, and the morphology and crystalline quality were enhanced by optimizing the precursor flows and pre-heating ambient substrate. The p-GaP/GaAs and p-GaP/Si samples were processed to photoelectrodes with an amorphous TiO2 coating for CO2 reduction and a combination of TiO2 layer and mesoporous tungsten phosphide catalyst for water splitting. P-GaP/GaAs with suitable Zn-doping concentration exhibited photoelectrochemical performance comparable to homoepitaxial p-GaP/GaP for water splitting and CO2 reduction. Degradation of photocurrent in p-GaP/Si photoelectrodes is observed in PEC water splitting due to the high density of defects arising from heteroepitaxial growth.
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5
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Ettadili F, Azriouil M, Matrouf M, Tahiri Alaoui O, Laghrib F, Farahi A, Bakasse M, Saqrane S, Lahrich S, El Mhammedi M. Materials framework based bio/sensors for the detection of ornidazole and metronidazole antibiotics in environment and foodstuffs. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Jia C, Wang K, Feng Y, Wang X. Efficient aerobic oxidation of 5‐hydroxymethyl‐2‐furfural into 2, 5‐diformylfuran by Cu
2
V
2
O
7
‐Al
2
O
3
spherical beads. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chuanqi Jia
- Tianjin Key Lab of Membrane Science and Desalination Technology, Chemical Engineering Research Center, School of Chemical Engineering and Technology Tianjin University Tianjin China
| | - Kang Wang
- Tianjin Key Lab of Membrane Science and Desalination Technology, Chemical Engineering Research Center, School of Chemical Engineering and Technology Tianjin University Tianjin China
| | - Yi Feng
- Tianjin Key Lab of Membrane Science and Desalination Technology, Chemical Engineering Research Center, School of Chemical Engineering and Technology Tianjin University Tianjin China
| | - Xitao Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology Tianjin University Tianjin China
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7
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Yamuna A, Chen TW, Chen SM, Jiang TY. Facile synthesis of single-crystalline Fe-doped copper vanadate nanoparticles for the voltammetric monitoring of lethal hazardous fungicide carbendazim. Mikrochim Acta 2021; 188:277. [PMID: 34322766 DOI: 10.1007/s00604-021-04941-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 07/12/2021] [Indexed: 10/20/2022]
Abstract
The highly selective and sensitive electrochemical detection of highly toxic fungicide carbendazim (CBZ) by the iron (Fe)-doped copper vanadate (CuVO4; CuV) is discussed. The Fe-doped copper vanadate (Fe-CuV) is prepared by the simple co-precipitation method followed by an annealing process which produced high crystallinity. The material properties of Fe-CuV are characterized by XRD, Raman spectrometry, XPS analysis, HRTEM, and SAED pattern. The electrochemical characterization of Fe-CuV towards CBZ detection are done by CV and DPV techniques. The Fe-CuV/GCE exhibits good electroanalytical activity towards the electro-oxidation of CBZ at the potential of 0.81 V vs Ag/AgCl. The developed sensor electrode revealed a linear range of 0.01 to 83.1 μM and a limit of detection of about 5 nM. In addition, Fe-CuV/GCE reveals good storage stability (RSD = 2.63%) and reproducibility (RSD = 2.85%) for the electro-oxidation of CBZ. The electrode material was applied to the detection of CBZ in apple juice and soy milk samples, and the results were discussed. Thus, our projected Fe-CuV/GCE can be employed as electrode material in a rapid onsite sensor for the detection and determination of noxious pollutants.
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Affiliation(s)
- Annamalai Yamuna
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, Republic of China
| | - Tse-Wei Chen
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, Republic of China.,Research and Development Center for Smart Textile Technology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan.,Department of Materials, Imperial College London, London, SW72AZ, UK
| | - Shen-Ming Chen
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, Republic of China.
| | - Ting-Yu Jiang
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, Republic of China
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8
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Eichhorn J, Jiang CM, Cooper JK, Sharp ID, Toma FM. Nanoscale Heterogeneities and Composition-Reactivity Relationships in Copper Vanadate Photoanodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:23575-23583. [PMID: 33998233 DOI: 10.1021/acsami.1c01848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The photoelectrochemical performance of thin film photoelectrodes can be impacted by deviations from the stoichiometric composition, both at the macroscale and at the nanoscale. This issue is especially pronounced for the class of ternary compounds that are currently investigated for simultaneously achieving the optoelectronic characteristics and chemical stability required for solar fuel generation. Here, we combine macroscopic photoelectrochemical testing with atomic force microscopy (AFM) and scanning transmission X-ray microscopy (STXM) to reveal relationships between photoelectrochemical activity, nanoscale morphology, and local chemical composition in copper vanadate (CVO) thin films as a model system. For films with varying Cu/(Cu + V) ratios around the ideal stoichiometry of stoiberite Cu5V2O10, AFM resolves submicrometer morphology variations, which correlate with variations of the Cu content resolved by STXM. Both stoichiometric and Cu-deficient films exhibit a clear photoresponse, which indicates electronic tolerance to reduced Cu content. While both films exhibit homogeneous O and V content, they are also characterized by local regions of Cu enrichment and depletion that extend beyond individual grains. By contrast, Cu-rich photoelectrodes exhibit a tendency toward CuO secondary phase formation and a significantly reduced photoelectrochemical activity, indicating a significantly poor electronic tolerance to Cu-enrichment. These findings highlight that the average film composition at the macroscale is insufficient for defining structure-function relationships in complex ternary compounds. Rather, correlating microscopic variations in chemical composition to macroscopic photoelectrochemical performance provides insights into photocatalytic activity and stability that are otherwise not apparent from pure macroscopic characterization.
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Affiliation(s)
- Johanna Eichhorn
- Chemical Sciences Division and Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Walter Schottky Institute and Physics Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Chang-Ming Jiang
- Chemical Sciences Division and Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Walter Schottky Institute and Physics Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Jason K Cooper
- Chemical Sciences Division and Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Ian D Sharp
- Walter Schottky Institute and Physics Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Francesca M Toma
- Chemical Sciences Division and Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
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9
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Vali A, Jee H, Myung N, Rajeshwar K. Combining Electrosynthesis with Thermolysis: A Safe/Scalable Route to Multinary Oxide Semiconductor Films. ChemElectroChem 2021. [DOI: 10.1002/celc.202100193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Abbas Vali
- Department of Chemistry & Biochemistry The University of Texas at Arlington Arlington TX 76109-0065 USA
| | - Hyung‐Woo Jee
- Department of Chemistry Yonsei University Wonju Kangwon 26493 Korea
| | - Noseung Myung
- Department of Applied Materials Konkuk University Glocal Campus Chungju Chungbuk 27478 Korea
| | - Krishnan Rajeshwar
- Department of Chemistry & Biochemistry The University of Texas at Arlington Arlington TX 76109-0065 USA
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10
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Kumari S, Junqueira JRC, Schuhmann W, Ludwig A. High-Throughput Exploration of Metal Vanadate Thin-Film Systems (M-V-O, M = Cu, Ag, W, Cr, Co, Fe) for Solar Water Splitting: Composition, Structure, Stability, and Photoelectrochemical Properties. ACS COMBINATORIAL SCIENCE 2020; 22:844-857. [PMID: 33103893 DOI: 10.1021/acscombsci.0c00150] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Combinatorial synthesis and high-throughput characterization of thin-film materials libraries enable to efficiently identify both photoelectrochemically active and inactive, as well as stable and instable systems for solar water splitting. This is shown on six ternary metal vanadate (M-V-O, M = Cu, Ag, W, Cr, Co, Fe) thin-film materials libraries, fabricated using combinatorial reactive magnetron cosputtering with subsequent annealing in air. By means of high-throughput characterization of these libraries correlations between composition, crystal structure, photocurrent density, and stability of the M-V-O systems in different electrolytes such as acidic, neutral and alkaline media were identified. The systems Cu-V-O and Ag-V-O are stable in alkaline electrolyte and exhibited photocurrents of 170 and 554 μA/cm2, respectively, whereas the systems W-V-O, Cr-V-O, and Co-V-O are not stable in alkaline electrolyte. However, the Cr-V-O and Co-V-O systems showed an enlarged photoactive region in acidic electrolyte, albeit with very low photocurrents (<10 μA/cm2). Complete data sets obtained from these different screening sets, including information on nonpromising systems, lays groundwork for their use to predict new systems for solar water splitting, for example, by machine learning.
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Affiliation(s)
- Swati Kumari
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - João R. C. Junqueira
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Alfred Ludwig
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
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11
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Galante MT, Santiago PVB, Yukuhiro VY, Silva LA, Dos Reis NA, Pires CTGVMT, Macedo NG, Costa LS, Fernandez PS, Longo C. Aminopolysiloxane as Cu
2
O Photocathode Overlayer: Photocorrosion Inhibitor and Low Overpotential CO
2
‐to‐formate Selectivity Promoter. ChemCatChem 2020. [DOI: 10.1002/cctc.202001638] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Miguel T. Galante
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Patrícia V. B. Santiago
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Victor Y. Yukuhiro
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Leonardo A. Silva
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Natália A. Dos Reis
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Cléo T. G. V. M. T. Pires
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Nadia G. Macedo
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Luelc S. Costa
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Pablo S. Fernandez
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
| | - Claudia Longo
- Institute of Chemistry University of Campinas CEP 13083–970 Campinas Brazil
- Center for Innovation on New Energies University of Campinas CEP 13083–841 Campinas Brazil
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12
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Ninova S, Strach M, Buonsanti R, Aschauer U. Suitability of Cu-substituted β-Mn 2V 2O 7 and Mn-substituted β-Cu 2V 2O 7 for photocatalytic water-splitting. J Chem Phys 2020; 153:084704. [DOI: 10.1063/5.0019306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Silviya Ninova
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland
| | - Michal Strach
- EPFL Valais Wallis, EPFL SB ISIC LNCE, Rue de l’Industrie 17, Case postale 440, 1951 Sion, Switzerland
| | - Raffaella Buonsanti
- EPFL Valais Wallis, EPFL SB ISIC LNCE, Rue de l’Industrie 17, Case postale 440, 1951 Sion, Switzerland
| | - Ulrich Aschauer
- University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland
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13
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Girardi L, Rizzi GA, Bigiani L, Barreca D, Maccato C, Marega C, Granozzi G. Copper Vanadate Nanobelts as Anodes for Photoelectrochemical Water Splitting: Influence of CoO x Overlayers on Functional Performances. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31448-31458. [PMID: 32558537 DOI: 10.1021/acsami.0c06915] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The design and development of environmentally friendly and robust anodes for photoelectrochemical (PEC) water splitting plays a critical role for the efficient conversion of radiant energy into hydrogen fuel. In this regard, quasi-1D copper vanadates (CuV2O6) were grown on conductive substrates by a hydrothermal procedure and processed for use as anodes in PEC cells, with particular attention on the role exerted by cobalt oxide (CoOx) overlayers deposited by radio frequency (RF) sputtering. The target materials were characterized in detail by a multitechnique approach with the aim at elucidating the interplay between their structure, composition, morphology, and the resulting activity as photoanodes. Functional tests were performed by standard electrochemical techniques like linear sweep voltammetry, impedance spectroscopy, and by the less conventional intensity modulated photocurrent spectroscopy, yielding an important insight into the material PEC properties. The obtained results highlight that, despite the fact that the supposedly favorable band alignment between CuV2O6 and Co3O4 did not yield a net current density increase, cobalt oxide-functionalized anodes afforded a remarkable durability enhancement, an important prerequisite for their eventual real-world applications. The concurrent phenomena accounting for the observed behavior are presented and discussed in relation to material physico-chemical properties.
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Affiliation(s)
- Leonardo Girardi
- Department of Chemical Sciences, Padova University and INSTM, Padova 35131, Italy
| | - Gian Andrea Rizzi
- Department of Chemical Sciences, Padova University and INSTM, Padova 35131, Italy
| | - Lorenzo Bigiani
- Department of Chemical Sciences, Padova University and INSTM, Padova 35131, Italy
| | - Davide Barreca
- CNR-ICMATE and INSTM, Department of Chemical Sciences, Padova University, Padova 35131 Italy
| | - Chiara Maccato
- Department of Chemical Sciences, Padova University and INSTM, Padova 35131, Italy
| | | | - Gaetano Granozzi
- Department of Chemical Sciences, Padova University and INSTM, Padova 35131, Italy
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14
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Kumari S, Junqueira JRC, Sarker S, Mehta A, Schuhmann W, Ludwig A. Structural and photoelectrochemical properties in the thin film system Cu–Fe–V–O and its ternary subsystems Fe–V–O and Cu–V–O. J Chem Phys 2020; 153:014707. [DOI: 10.1063/5.0009512] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Swati Kumari
- Materials Discovery and Interfaces (MDI), Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, D-44801 Bochum, Germany
| | - João R. C. Junqueira
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, D-44801 Bochum, Germany
| | - Suchismita Sarker
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Apurva Mehta
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Wolfgang Schuhmann
- Analytical Chemistry—Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, D-44801 Bochum, Germany
| | - Alfred Ludwig
- Materials Discovery and Interfaces (MDI), Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, D-44801 Bochum, Germany
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15
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Guo W, Lian X. Kinetics mechanism insights into the oxygen evolution reaction on the (110) and (022) crystal facets of β-Cu 2V 2O 7. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00959h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We study the kinetics mechanism for the oxygen evolution reaction (OER) on the (110) and (022) facets of β-Cu2V2O7 using the density functional theory and find that the (110) orientation is more OER active than (022).
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Affiliation(s)
- Wenlong Guo
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing
- P. R. China
| | - Xin Lian
- College of Chemistry and Chemical Engineering
- Chongqing University of Science and Technology
- Chongqing
- P. R. China
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Lee DK, Lee D, Lumley MA, Choi KS. Progress on ternary oxide-based photoanodes for use in photoelectrochemical cells for solar water splitting. Chem Soc Rev 2019; 48:2126-2157. [PMID: 30499570 DOI: 10.1039/c8cs00761f] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Solar water splitting using photoelectrochemical cells (PECs) has emerged as one of the most promising routes to produce hydrogen as a clean and renewable fuel source. Among various semiconductors that have been considered as photoelectrodes for use in PECs, oxide-based photoanodes are particularly attractive because of their stability in aqueous media in addition to inexpensive and facile processing compared to other types of semiconductors. However, they typically suffer from poor charge carrier separation and transport. In the past few years, there has been tremendous progress in developing ternary oxide-based photoelectrodes, specifically, photoanodes. The use of ternary oxides provides more opportunities to tune the composition and electronic structure of the photoelectrode compared to binary oxides, thus providing more freedom to tune the photoelectrochemical properties. In this article, we outline the important characteristics to analyze when evaluating photoanodes and review the major recent progress made on the development of ternary oxide-based photoanodes. For each system, we highlight the favorable and unfavorable features and summarize the strategies utilized to address the challenges associated with each material. Finally, by combining our analyses of all the photoanodes surveyed in this review, we provide possible future research directions for each compound and an outlook for constructing more efficient oxide-based PECs. Overall, this review will provide a critical overview of current ternary oxide-based photoanodes and will serve as a platform for the design of future oxide-based PECs.
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Affiliation(s)
- Dong Ki Lee
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA.
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Eichhorn J, Kastl C, Schwartzberg AM, Sharp ID, Toma FM. Disentangling the Role of Surface Chemical Interactions on Interfacial Charge Transport at BiVO 4 Photoanodes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35129-35136. [PMID: 30230810 DOI: 10.1021/acsami.8b11366] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemical transformations that occur on photoactive materials, such as photoelectrochemical water splitting, are strongly influenced by the surface properties as well as by the surrounding environment. Herein, we elucidate the effects of oxygen and water surface adsorption on band alignment, interfacial charge transfer, and charge-carrier transport by using complementary Kelvin probe measurements and photoconductive atomic force microscopy on bismuth vanadate. By observing variations in surface potential, we show that adsorbed oxygen acts as an electron-trap state at the surface of bismuth vanadate, whereas adsorbed water results in formation of a dipole layer without inducing interfacial charge transfer. The apparent change of trap state density under dry or humid nitrogen, as well as under oxygen-rich atmosphere, proves that surface adsorbates influence charge-carrier transport properties in the material. The finding that oxygen introduces electronically active states on the surface of bismuth vanadate may have important implications for understanding functional characteristics of water splitting photoanodes, devising strategies to passivate interfacial trap states, and elucidating important couplings between energetics and charge transport in reaction environments.
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Affiliation(s)
| | | | | | - Ian D Sharp
- Walter Schottky Institut and Physik Department , Technische Universität München , Am Coulombwall 4 , Garching 85748 , Germany
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Wiktor J, Reshetnyak I, Strach M, Scarongella M, Buonsanti R, Pasquarello A. Sizable Excitonic Effects Undermining the Photocatalytic Efficiency of β-Cu 2V 2O 7. J Phys Chem Lett 2018; 9:5698-5703. [PMID: 30193068 DOI: 10.1021/acs.jpclett.8b02323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Copper vanadates have been proposed as promising photoanodes for water-splitting photoelectrochemical cells, but their performance has recently been shown to be severely limited. To understand this behavior, we study the electronic structure and the optical properties of β-Cu2V2O7 both experimentally and computationally. The measured absorption spectrum shows an absorption peak at 1.5 eV followed by the onset of an apparent continuum at 2.26 eV, as generally found for this class of materials. We perform calculations within the framework of the QS GW̃ method and the Bethe-Salpeter equation while including effects of magnetic ordering, nuclear quantum motion, and thermal vibrations. We demonstrate the occurrence of two kinds of excitons with high binding energies upon optical excitation in β-Cu2V2O7, which account for the first absorption peak and the lower edge of the apparent continuum. The results are confirmed by photoluminescence measurements, where sub-band-gap emissions are found for both excitons. These results provide an explanation for the low photocatalytic efficiencies of copper vanadates, despite the favorable size of their optical band gaps.
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Affiliation(s)
- Julia Wiktor
- Chaire de Simulation à l'Echelle Atomique (CSEA) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
| | - Igor Reshetnyak
- Chaire de Simulation à l'Echelle Atomique (CSEA) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
| | - Michal Strach
- Laboratory of Nanochemistry for Energy (LNCE) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1951 Sion , Switzerland
| | - Mariateresa Scarongella
- Laboratory of Nanochemistry for Energy (LNCE) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1951 Sion , Switzerland
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy (LNCE) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1951 Sion , Switzerland
| | - Alfredo Pasquarello
- Chaire de Simulation à l'Echelle Atomique (CSEA) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
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Girardi L, Shuang S, Rizzi GA, Sartorel A, Marega C, Zhang Z, Granozzi G. Visible Light Driven Photoanodes for Water Oxidation Based on Novel r-GO/β-Cu₂V₂O₇/TiO₂ Nanorods Composites. NANOMATERIALS 2018; 8:nano8070544. [PMID: 30022003 PMCID: PMC6070958 DOI: 10.3390/nano8070544] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/04/2018] [Accepted: 07/16/2018] [Indexed: 11/18/2022]
Abstract
This paper describes the preparation and the photoelectrochemical performances of visible light driven photoanodes based on novel r-GO/β-Cu2V2O7/TiO2 nanorods/composites. β-Cu2V2O7 was deposited on both fluorine doped tin oxide (FTO) and TiO2 nanorods (NRs)/FTO by a fast and convenient Aerosol Assisted Spray Pyrolysis (AASP) procedure. Ethylenediamine (EN), ammonia and citric acid (CA) were tested as ligands for Cu2+ ions in the aerosol precursors solution. The best-performing deposits, in terms of photocurrent density, were obtained when NH3 was used as ligand. When β-Cu2V2O7 was deposited on the TiO2 NRs a good improvement in the durability of the photoanode was obtained, compared with pure β-Cu2V2O7 on FTO. A further remarkable improvement in durability and photocurrent density was obtained upon addition, by electrophoretic deposition, of reduced graphene oxide (r-GO) flakes on the β-Cu2V2O7/TiO2 composite material. The samples were characterized by X-ray Photoelectron Spectroscopy (XPS), Raman, High Resolution Transmission Electron Microscopy (HR-TEM), Scanning Electron Microscopy (SEM), Wide Angle X-ray Diffraction (WAXD) and UV–Vis spectroscopies. The photoelectrochemical (PEC) performances of β-Cu2V2O7 on FTO, β-Cu2V2O7/TiO2 and r-GO/β-Cu2V2O7/TiO2 were tested in visible light by linear voltammetry and Electrochemical Impedance Spectroscopy (EIS) measurements.
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Affiliation(s)
- Leonardo Girardi
- University of Padova and INSTM Unit, via Marzolo 1, 35121 Padova, Italy.
| | - Shuang Shuang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Gian Andrea Rizzi
- University of Padova and INSTM Unit, via Marzolo 1, 35121 Padova, Italy.
| | - Andrea Sartorel
- University of Padova and INSTM Unit, via Marzolo 1, 35121 Padova, Italy.
| | - Carla Marega
- University of Padova and INSTM Unit, via Marzolo 1, 35121 Padova, Italy.
| | - Zhengjun Zhang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Gaetano Granozzi
- University of Padova and INSTM Unit, via Marzolo 1, 35121 Padova, Italy.
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Gadiyar C, Strach M, Schouwink P, Loiudice A, Buonsanti R. Chemical transformations at the nanoscale: nanocrystal-seeded synthesis of β-Cu 2V 2O 7 with enhanced photoconversion efficiencies. Chem Sci 2018; 9:5658-5665. [PMID: 30061999 PMCID: PMC6050627 DOI: 10.1039/c8sc01314d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/25/2018] [Indexed: 11/24/2022] Open
Abstract
Nanocrystal-seeded synthesis relies on the reaction of nanocrystal seeds with a molecular precursor and it can be regarded as the link between sol–gel and solid-state chemistries.
Nanocrystal-seeded synthesis relies on the reaction of nanocrystal seeds with a molecular precursor and it can be regarded as the link between sol–gel and solid-state chemistries. This synthesis approach aims at accessing compositionally complex materials, yet to date its full potential remains unexploited. Herein, surface oxidized Cu nanocrystal seeds with diameters from 6 nm to 70 nm are reacted with vanadium acetylacetonate to form β-Cu2V2O7 with a tunable grain size ranging from 29 nm to 63 nm. In situ X-ray diffraction measurements evidence the occurrence of a solid-state reaction between the NC seeds and the vanadium oxide formed during the annealing. The variation of the ion diffusion lengths, the homogeneity of the precursor solution and the number of nucleation sites with the NC seed size explains the lower formation temperature, the smaller grain size and the higher grain size monodispersity of β-Cu2V2O7 as the seed size decreases. Finally, the tunability afforded by the nanocrystal-seeded synthesis provides a unique opportunity to correlate the photoelectrochemical performance with the grain size in a size regime close to the charge carrier diffusion length of β-Cu2V2O7 (20–40 nm). The net photocurrent density peaks when the grain size is 39 nm by reaching 0.23 mA cm–2 at 1.23 V vs. RHE in the presence of a hole scavenger. While still far from the theoretical limit, this result overcomes the current state-of-the-art for β-Cu2V2O7. An interesting double fold increase in the photocurrent is found in mixed phase β-Cu2V2O7/CuV2O6 samples, suggesting that nanostructuring and heterostructuring are beneficial to the performance.
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Affiliation(s)
- Chethana Gadiyar
- Laboratory of Nanochemistry for Energy (LNCE) , Department of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , CH-1950 Sion , Switzerland .
| | - Michal Strach
- Laboratory of Nanochemistry for Energy (LNCE) , Department of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , CH-1950 Sion , Switzerland .
| | - Pascal Schouwink
- Department of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , CH-1950 Sion , Switzerland
| | - Anna Loiudice
- Laboratory of Nanochemistry for Energy (LNCE) , Department of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , CH-1950 Sion , Switzerland .
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy (LNCE) , Department of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , CH-1950 Sion , Switzerland .
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