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Ma Z, Yin Y, Jiang Y, Luo W, Xu J, Chen Y, Bao Z, Guo C, Lv J. Fast annealing fabrication of porous CuWO 4photoanode for charge transport in photoelectrochemical water oxidation. NANOTECHNOLOGY 2024; 35:385401. [PMID: 38917778 DOI: 10.1088/1361-6528/ad5b67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 06/25/2024] [Indexed: 06/27/2024]
Abstract
Ternary-phase CuWO4oxide with an electronic band gap of 2.2-2.4 eV is a potential candidate photoanode material for photoelectrochemical (PEC) water splitting. Herein, we present an efficient method to prepare CuWO4film photoanode by combining hydrothermal method and hybrid microwave annealing (HMA) process. In comparison with conventional thermal annealing (CTA), HMA can achieve CuWO4thin film within minutes by using SiC susceptor. When the CuWO4photoanode is prepared by HMA, its PEC water oxidation performance improves from 0.21 to 0.29 mA cm-2at 1.23 VRHEcomparing with the one prepared by CTA. The origin of the enhanced photocurrent was investigated by means of complementary physical characterizations and PEC methods. The results demonstrated that the obtained HMA processed CuWO4photoanode not only exhibited intrinsic porous nanostructures but also abundant surface hydroxyl groups, which facilitated sufficient mass transport and the charge transfer. Our results highlight the application of HMA for the fast fabrication of porous film photo-electrodes without using sacrificial template.
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Affiliation(s)
- Zili Ma
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Yanjun Yin
- School of Chemistry and Material Engineering, Chaohu University, Chaohu 238024, People's Republic of China
| | - Ye Jiang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Weihao Luo
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Jinyu Xu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Yan Chen
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Zhiyong Bao
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Chaozhong Guo
- College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China
| | - Jun Lv
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
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2
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Marchini E, Caramori S, Carli S. Metal Complexes for Dye-Sensitized Photoelectrochemical Cells (DSPECs). Molecules 2024; 29:293. [PMID: 38257206 PMCID: PMC10818894 DOI: 10.3390/molecules29020293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/24/2024] Open
Abstract
Since Mallouk's earliest contribution, dye-sensitized photoelectrochemical cells (DSPECs) have emerged as a promising class of photoelectrochemical devices capable of storing solar light into chemical bonds. This review primarily focuses on metal complexes outlining stabilization strategies and applications. The ubiquity and safety of water have made its splitting an extensively studied reaction; here, we present some examples from the outset to recent advancements. Additionally, alternative oxidative pathways like HX splitting and organic reactions mediated by a redox shuttle are discussed.
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Affiliation(s)
- Edoardo Marchini
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy;
| | - Stefano Caramori
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121 Ferrara, Italy;
| | - Stefano Carli
- Department of Environmental and Prevention Sciences, University of Ferrara, 44121 Ferrara, Italy;
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3
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Nomellini C, Polo A, Grigioni I, Marra G, Dozzi MV, Selli E. Ni(II)-doped CuWO 4 photoanodes with enhanced photoelectrocatalytic activity. Photochem Photobiol Sci 2023:10.1007/s43630-023-00484-4. [PMID: 37831332 DOI: 10.1007/s43630-023-00484-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023]
Abstract
CuWO4 has emerged in the last years as a ternary metal oxide material for photoanodes application in photoelectrochemical cells, thanks to its relatively narrow band gap, high stability and selectivity toward the oxygen evolution reaction, though largely limited by its poor charge separation efficiency. Aiming at overcoming this limitation, we investigate here the effects that Cu(II) ion substitution has on the photoelectrocatalytic (PEC) performance of copper tungstate. Optically transparent CuWO4 thin-film photoanodes, prepared via spin coating and containing different amounts of Ni(II) ions, were fully characterized via UV-Vis spectroscopy, XRD and SEM analyses, and their PEC performance was tested via linear sweep voltammetry, incident photon to current efficiency and internal quantum efficiency analyses. From tests performed in the presence of a hole scavenger-containing electrolyte, the charge injection and separation efficiencies of the electrodes were also calculated. Pure-phase crystalline and/or heterojunction materials were obtained with higher PEC performance compared to pure CuWO4, mainly due to a significantly enhanced charge separation efficiency in the bulk of the material.
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Affiliation(s)
- Chiara Nomellini
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Annalisa Polo
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Ivan Grigioni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Gianluigi Marra
- ENI S.p.A. Novara Laboratories (NOLAB), Renewable New Energies and Material Science Research Center (DE-R&D), Via G. Fauser 4, 28100, Novara, Italy
| | - Maria Vittoria Dozzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Elena Selli
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy.
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4
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Grigioni I, Polo A, Nomellini C, Vigni L, Poma A, Dozzi MV, Selli E. Nature of Charge Carrier Recombination in CuWO 4 Photoanodes for Photoelectrochemical Water Splitting. ACS APPLIED ENERGY MATERIALS 2023; 6:10020-10029. [PMID: 37830012 PMCID: PMC10565723 DOI: 10.1021/acsaem.3c01608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/01/2023] [Indexed: 10/14/2023]
Abstract
CuWO4 is a ternary semiconductor oxide with excellent visible light harvesting properties up to 550 nm and stability at high pH values, which make it a suitable material to build photoanodes for solar light conversion to hydrogen via water splitting. In this work, we studied the photoelectrochemical (PEC) performance of transparent CuWO4 electrodes with tunable light absorption and thickness, aiming at identifying the intrinsic bottlenecks of photogenerated charge carriers in this semiconductor. We found that electrodes with optimal CuWO4 thickness exhibit visible light activity due to the absorption of long-wavelength photons and a balanced electron and hole extraction from the oxide. The PEC performance of CuWO4 is light-intensity-dependent, with charge recombination increasing with light intensity and most photogenerated charge carriers recombining in bulk sites, as demonstrated by PEC tests performed in the presence of sacrificial agents or cocatalysts. The best-performing 580 nm thick CuWO4 electrode delivers a photocurrent of 0.37 mA cm-2 at 1.23 VSHE, with a 7% absorbed photon to current efficiency over the CuWO4 absorption spectrum.
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Affiliation(s)
- Ivan Grigioni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Annalisa Polo
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Chiara Nomellini
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Laura Vigni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Alessandro Poma
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Maria Vittoria Dozzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Elena Selli
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
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5
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Chu X, Santos-Carballal D, de Leeuw NH. Exploring the Redox Properties of the Low-Miller Index Surfaces of Copper Tungstate (CuWO 4): Evaluating the Impact of the Environmental Conditions on the Water Splitting and Carbon Dioxide Reduction Processes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:18944-18961. [PMID: 37791103 PMCID: PMC10544046 DOI: 10.1021/acs.jpcc.3c04413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/25/2023] [Indexed: 10/05/2023]
Abstract
Photocatalysis has gained significant attention and interest as an environmentally friendly and sustainable approach to the production of hydrogen through water splitting and the reduction and conversion of CO2. Copper tungstate (CuWO4) is a highly promising candidate for these applications owing to its appropriate bandgap and superior stability under different conditions. However, the redox behavior of the CuWO4 surfaces under different environments and their impact on the morphology of the material nanoparticles, as well as the electronic properties, remain poorly understood. In this study, we have employed density functional theory calculations to investigate the properties of the bulk and pristine surfaces of CuWO4 and how the latter are impacted by oxygen chemisorption under the conditions required for photocatalytic water splitting and carbon dioxide reduction processes. We have calculated the lattice parameters and electronic properties of the bulk phase, as well as the surface energies of all possible nonpolar, stoichiometric, and symmetric terminations of the seven low-Miller index surfaces and found that the (010) and (110) facets are the thermodynamically most stable. The surface-phase diagrams were used to derive the equilibrium crystal morphologies, which show that the pristine (010) surface is prominent under synthesis and room conditions. Our crystal morphologies suggest that the partially oxidized (110) surface and the partially reduced (011) surface may play an important role in the photocatalytic splitting of water and CO2 conversion, respectively. Our results provide a comprehensive understanding of the CuWO4 surfaces under the conditions of important photocatalytic applications.
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Affiliation(s)
- Xuan Chu
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
| | | | - Nora H. de Leeuw
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
- Department
of Earth Sciences, Utrecht University, Princetonplein 8A, Utrecht 3584 CD, The Netherlands
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6
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Hao J, Wu K, Lyu C, Yang Y, Wu H, Liu J, Liu N, Lau WM, Zheng J. Recent advances in interface engineering of Fe/Co/Ni-based heterostructure electrocatalysts for water splitting. MATERIALS HORIZONS 2023. [PMID: 37132292 DOI: 10.1039/d3mh00366c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Among various methods of developing hydrogen energy, electrocatalytic water splitting for hydrogen production is one of the approaches to achieve the goal of zero carbon emissions. It is of great significance to develop highly active and stable catalysts to improve the efficiency of hydrogen production. In recent years, the construction of nanoscale heterostructure electrocatalysts through interface engineering can not only overcome the shortcomings of single-component materials to effectively improve their electrocatalytic efficiency and stability but also adjust the intrinsic activity or design synergistic interfaces to improve catalytic performance. Among them, some researchers proposed to replace the slow oxygen evolution reaction at the anode with the oxidation reaction of renewable resources such as biomass to improve the catalytic efficiency of the overall water splitting. The existing reviews in the field of electrocatalysis mainly focus on the relationship between the interface structure, principle, and principle of catalytic reaction, and some articles summarize the performance and improvement schemes of transition metal electrocatalysts. Among them, few studies are focusing on Fe/Co/Ni-based heterogeneous compounds, and there are fewer summaries on the oxidation reactions of organic compounds at the anode. To this end, this paper comprehensively describes the interface design and synthesis, interface classification, and application in the field of electrocatalysis of Fe/Co/Ni-based electrocatalysts. Based on the development and application of current interface engineering strategies, the experimental results of biomass electrooxidation reaction (BEOR) replacing anode oxygen evolution reaction (OER) are discussed, and it is feasible to improve the overall electrocatalytic reaction efficiency by coupling with hydrogen evolution reaction (HER). In the end, the challenges and prospects for the application of Fe/Co/Ni-based heterogeneous compounds in water splitting are briefly discussed.
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Affiliation(s)
- Ju Hao
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Kaili Wu
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Chaojie Lyu
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Yuquan Yang
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Hongjing Wu
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Jiajia Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Naiyan Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Woon-Ming Lau
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
- Shunde Innovation School, University of Science and Technology Beijing Foshan 528399, P. R. China
| | - Jinlong Zheng
- Beijing Advanced Innovation Center for Materials Genome Engineering Center for Green Innovation, School of Mathematics and Physics University of Science and Technology Beijing, Beijing 100083, P. R. China.
- Shunde Innovation School, University of Science and Technology Beijing Foshan 528399, P. R. China
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7
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Lin F, Zhou Y, Xu R, Zhou M, Connolly AM, Young RJ, Kinloch IA. Production of Graphene/Inorganic Matrix Composites through the Sintering of Graphene Oxide Flakes Decorated with CuWO 4·2H 2O Nanoparticles. ACS OMEGA 2023; 8:13131-13139. [PMID: 37065072 PMCID: PMC10099426 DOI: 10.1021/acsomega.3c00063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
There is growing interest in graphene-reinforced inorganic matrix composites, but progress in this field is far behind that of polymer matrices due to difficulties in the processing of carbon materials in aggressive sintering environments, including oxidation and solubility in the host matrix. Copper-tungsten matrices are of particular interest in the power switching field but are difficult to produce due to the mutual insolubility of metals and poor wetting. Herein, composites were produced by decorating graphene oxide flakes with 8 nm diameter CuWO4·2H2O nanoparticles and then sintering them to form the final shape. The oxide nanoparticles were found to self-assemble into platelets on the surfaces of graphene flakes. Upon sintering, the presence of graphene was found to change the grain morphology from elongated needles to a polyhedral shape. It was found that, despite the nanosize of the CuWO4·2H2O particles used, the sintering conditions did not reduce the matrix to a pure metal; the sintered composites were found to be of mixed phase with copper tungstate and copper oxide present. Raman spectroscopy indicated that the graphene oxide became hydrogenated during the sintering process as a result of the reducing hydrogen atmosphere used.
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Affiliation(s)
- Fei Lin
- Department
of Materials and the National Graphene Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Yuzhen Zhou
- Department
of Electrical Equipment & Material, Global Energy Interconnection Research Institute Europe GmbH, Berlin 10623, Germany
| | - Ruoyu Xu
- Department
of Electrical Equipment & Material, Global Energy Interconnection Research Institute Europe GmbH, Berlin 10623, Germany
| | - Mingyu Zhou
- Department
of Electrical Equipment & Material, Global Energy Interconnection Research Institute Europe GmbH, Berlin 10623, Germany
| | - Andrew M. Connolly
- Department
of Materials and the National Graphene Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Robert J. Young
- Department
of Materials and the National Graphene Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Ian A. Kinloch
- Department
of Materials and the National Graphene Institute, University of Manchester, Manchester M13 9PL, U.K.
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8
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Chen L, Li W, Qiu W, He G, Wang K, Liu Y, Wu Q, Li J. Oriented CuWO 4 Films for Improved Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47737-47746. [PMID: 36228181 DOI: 10.1021/acsami.2c13002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Hydrogen generation through photoelectrochemical (PEC) technology is one of the most appropriate ways for delivering sustainable fuel. Simultaneously, anisotropic properties will be exhibited by the materials with low crystal symmetry, allowing the tuning of the PEC properties by controlling the crystallographic orientation and exposed facets. Therefore, we synthesized copper tungstate films (CuWO4) with highly exposed (100) crystal facets by regulating anions in the precursor solution. According to experimental characterization and density functional theory calculations, the CuWO4 film with a high exposure ratio of the (100) crystal facet has promoted charge transport with trap-free mode and reduced recombination of electrons and holes. Meanwhile, the oxygen evolution reaction is promoted on the (100) facet because of the relatively low energy barrier. Compared to the CuWO4 with other mixed exposure facets, CuWO4 with a highly exposed (100) facet presents a twofold current density (0.38 mA/cm2) and one-fifteenth electron transit time (0.698 ms) and also has great stability (more than 6 h). These results provide an easy way to enhance the PEC performance by modulating the exposure facets of the film electrode.
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Affiliation(s)
- Long Chen
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
| | - Wenzhang Li
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
- Hunan Provincial Key Laboratory of Powder Supply, Central South University, Changsha410083, China
| | - Weixin Qiu
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
| | - Gaoshuang He
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
| | - Keke Wang
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
| | - Yang Liu
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
| | - Qing Wu
- Information and Network Center, Central South University, Changsha410083, China
| | - Jie Li
- School of Chemistry and Chemical Engineering, Central South University, Changsha410083, China
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9
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Shahsavarifar S, Masteri-Farahani M, Ganjali MR. A New Photoelectrocatalyst for Water Oxidation: A Polyoxometalate-Graphitic Carbon Nitride Hybrid Nanomaterial. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12124-12131. [PMID: 36154057 DOI: 10.1021/acs.langmuir.2c01096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A new photoelectrocatalyst for the water oxidation process is designed by immobilizing [CoW12O40]6- (CoW12) heteropolyanions on the surface of covalently modified graphitic carbon nitride nanosheets (g-C3N4). For this purpose, g-C3N4 is first modified with cysteamine hydrochloride through the well-known thiol-ene click reaction. Afterward, [CoW12O40]6- heteropolyanions are immobilized on the surface of modified g-C3N4 nanosheets with electrostatic interaction with ammonium groups. After confirming the preparation of CoW12/clicked g-C3N4 with various physicochemical methods, its photoelectrocatalytic activity is evaluated in the oxygen evolution reaction. The CoW12/clicked g-C3N4 exhibits a low onset potential of 1.32 V versus NHE and a low overpotential of 230 mV at 10 mA cm-2 with a low Tafel slope of 67 mV dec-1 under visible light illumination. Moreover, the stability of the catalyst is investigated through the chronoamperometric measurements.
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Affiliation(s)
| | | | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran 14176-11411, Iran
- Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran 14166-34793, Iran
- School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, PR China
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10
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Liu Y, Chen L, Zhu X, Qiu H, Wang K, Li W, Cao S, Zhang T, Cai Y, Wu Q, Li J. Effects of operating temperature on photoelectrochemical performance of CuWO4 film photoanode. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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11
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Chen R, Dou X, Xia J, Chen Y, Shi H. Boosting peroxymonosulfate activation over Bi2MoO6/CuWO4 to rapidly degrade tetracycline: Intermediates and mechanism. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Baues S, Vocke H, Harms L, Rücker KK, Wark M, Wittstock G. Combinatorial Screening of Cu-W Oxide-Based Photoanodes for Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6590-6603. [PMID: 35076196 DOI: 10.1021/acsami.1c20837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Metal oxide libraries for photoanodes for the oxygen evolution reaction (OER) were generated by printing a metal salt solution in an array layout, followed by calcination to yield 22 ternary metal oxide systems. The libraries included a ternary metal cation system based on CuWO4 with one out of eight transition or posttransition metal ions Cr, Mn, Fe, Co, Ni, Zn, Bi, and Ga in different overall atomic ratios. The photocatalyst libraries were screened by scanning photoelectrochemical microscopy for the highest anodic photocurrents. Array elements that showed promising performance were printed in another set of eight libraries with smaller increments of overall composition. Improved performance with respect to CuWO4 was found for Ga, Co, and Ni as the third element. A comparison of the most active composition of those arrays within one library showed the highest activity for Cu48Ga3W49Ox. Printing spots of identical composition (Cu48Ga3W49Ox, Cu44Ni9W47Ox, and Cu44Co9W47Ox) over a larger area facilitated further characterization by X-ray photoelectron spectroscopy ultraviolet photoelectron spectroscopy (UPS), X-ray diffraction, scanning electron microscopy, chopped light voltammetry, and scanning electrochemical microscopy for the OER. High and stable steady-state photocurrents were generated in a photoelectrochemical cell for all three electrodes even at a low constant bias voltage. The best overall photoanode composition Cu48Ga3W49Ox showed currents that were 36 times higher than the currents of the binary Cu50W50Ox system. Significant n-doping was found by UPS valence band spectra for Ga-containing materials.
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Affiliation(s)
- Svenja Baues
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Heinrich Vocke
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Lena Harms
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Konstantin K Rücker
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Michael Wark
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
| | - Gunther Wittstock
- Carl von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, 26111 Oldenburg, Germany
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13
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Rosa WS, Rabelo LG, Tiveron Zampaulo LG, Gonçalves RV. Ternary Oxide CuWO 4/BiVO 4/FeCoO x Films for Photoelectrochemical Water Oxidation: Insights into the Electronic Structure and Interfacial Band Alignment. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22858-22869. [PMID: 35021014 DOI: 10.1021/acsami.1c21001] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photoelectrochemical (PEC) water oxidation using ternary oxide systems has been considered a promising approach for investigating the effective utilization of sunlight and the production of green fuel. Herein, we report a ternary-oxide-based CuWO4/BiVO4/FeCoOx film deposited entirely by RF-magnetron sputtering using homemade ceramic targets. Our CuWO4/BiVO4 photoanode exhibits a significant photocurrent density of 0.82 mA cm-2 at 1.23 V vs RHE under AM 1.5G illumination, which is a record 382% increase compared to that of the bare CuWO4 film. To further boost the PEC performance, we deposited an ultrathin layer of amorphous FeCoOx cocatalyst, resulting in a triple CuWO4/BiVO4/FeCoOx heterojunction with a significant reduction in onset potential and a 500% increase in the photocurrent density of bare CuWO4. Experimental and theoretical approaches were used to provide insights into the interfacial band alignment and photoinduced charge carrier pathway across heterojunctions. Our results reveal noticeable interface potential barriers for charge carriers at the CuWO4/BiVO4 heterojunction, potentially limiting its application in tandem systems. Conversely, the deposition of the FeCoOx ultrathin layer over the CuWO4/BiVO4 heterojunction induces a p-n junction on the BiVO4/FeCoOx interface, which, when combined with the abundant FeCoOx oxygen vacancies, results in improved charge separation and transport as well as enhanced photoelectrochemical stability. Our study provides a feasible strategy for producing photocatalytic heterojunction systems and introduces simple tools for investigating interface effects on photoinduced charge carrier pathways for PEC water splitting.
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Affiliation(s)
- Washington S Rosa
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
| | - Lucas G Rabelo
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
| | | | - Renato V Gonçalves
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
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14
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Zhang Y, Li S, Liu H, Shi F, Li J, Hu X, Yang Z. Dual-strategy biosensing of glucose based on multifunctional CuWO 4 nanoparticles. Analyst 2022; 147:4049-4054. [DOI: 10.1039/d2an01003h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The multifunctional CuWO4 NPs were prepared and exhibit large specific surface area, good conductivity and excellent peroxidase-like activity, which was exploited for electrochemical and colorimetric dual-strategy biosensing of glucose.
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Affiliation(s)
- Yu Zhang
- School of Nursing, Yangzhou University, Yangzhou 225000, PR China
| | - Shuang Li
- School of Nursing, Yangzhou University, Yangzhou 225000, PR China
| | - Hongyuan Liu
- School of Nursing, Yangzhou University, Yangzhou 225000, PR China
| | - Feng Shi
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Juan Li
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Xiaoya Hu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Zhanjun Yang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
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15
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Tayar Galante M, Živković A, Alvim J, Calchi Kleiner CC, Sangali M, Taylor SFR, Greer AJ, Hardacre C, Rajeshwar K, Caram R, Bertazzoli R, Macaluso RT, de Leeuw NH, Longo C. Arc Synthesis, Crystal Structure, and Photoelectrochemistry of Copper(I) Tungstate. ACS APPLIED MATERIALS & INTERFACES 2021; 13:32865-32875. [PMID: 34251184 PMCID: PMC8311641 DOI: 10.1021/acsami.1c03928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
A little-studied p-type ternary oxide semiconductor, copper(I) tungstate (Cu2WO4), was assessed by a combined theoretical/experimental approach. A detailed computational study was performed to solve the long-standing debate on the space group of Cu2WO4, which was determined to be triclinic P1. Cu2WO4 was synthesized by a time-efficient, arc-melting method, and the crystalline reddish particulate product showed broad-band absorption in the UV-visible spectral region, thermal stability up to ∼260 °C, and cathodic photoelectrochemical activity. Controlled thermal oxidation of copper from the Cu(I) to Cu(II) oxidation state showed that the crystal lattice could accommodate Cu2+ cations up to ∼260 °C, beyond which the compound was converted to CuO and CuWO4. This process was monitored by powder X-ray diffraction and X-ray photoelectron spectroscopy. The electronic band structure of Cu2WO4 was contrasted with that of the Cu(II) counterpart, CuWO4 using spin-polarized density functional theory (DFT). Finally, the compound Cu2WO4 was determined to have a high-lying (negative potential) conduction band edge underlining its promise for driving energetic photoredox reactions.
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Affiliation(s)
- Miguel Tayar Galante
- Institute
of Chemistry, University of Campinas—UNICAMP, 13083-970 Campinas, Brazil
- Center
for Innovation on New Energies, University
of Campinas, CEP 13083-841 Campinas, Brazil
| | - Aleksandar Živković
- Department
of Earth Sciences, Utrecht University, Princetonlaan 8a, 3548CB Utrecht, The Netherlands
| | - Jéssica
Costa Alvim
- Institute
of Chemistry, University of Campinas—UNICAMP, 13083-970 Campinas, Brazil
- Center
for Innovation on New Energies, University
of Campinas, CEP 13083-841 Campinas, Brazil
| | | | - Márcio Sangali
- Faculty
of Mechanical Engineering, University of
Campinas—UNICAMP, 13083-970 Campinas, Brazil
| | - S. F. Rebecca Taylor
- Department
of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Adam J. Greer
- Department
of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Christopher Hardacre
- Department
of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Krishnan Rajeshwar
- Department
of Chemistry and Biochemistry, The University
of Texas at Arlington, Arlington, Texas 76019, United States
| | - Rubens Caram
- Faculty
of Mechanical Engineering, University of
Campinas—UNICAMP, 13083-970 Campinas, Brazil
| | - Rodnei Bertazzoli
- Faculty
of Mechanical Engineering, University of
Campinas—UNICAMP, 13083-970 Campinas, Brazil
| | - Robin T. Macaluso
- Department
of Chemistry and Biochemistry, The University
of Texas at Arlington, Arlington, Texas 76019, United States
| | - Nora H. de Leeuw
- Department
of Earth Sciences, Utrecht University, Princetonlaan 8a, 3548CB Utrecht, The Netherlands
- School
of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United
Kingdom
| | - Claudia Longo
- Institute
of Chemistry, University of Campinas—UNICAMP, 13083-970 Campinas, Brazil
- Center
for Innovation on New Energies, University
of Campinas, CEP 13083-841 Campinas, Brazil
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16
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Uemura Y, Ismail ASM, Park SH, Kwon S, Kim M, Niwa Y, Wadati H, Elnaggar H, Frati F, Haarman T, Höppel N, Huse N, Hirata Y, Zhang Y, Yamagami K, Yamamoto S, Matsuda I, Katayama T, Togashi T, Owada S, Yabashi M, Halisdemir U, Koster G, Yokoyama T, Weckhuysen BM, de Groot FMF. Femtosecond Charge Density Modulations in Photoexcited CuWO 4. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:7329-7336. [PMID: 33859771 PMCID: PMC8040018 DOI: 10.1021/acs.jpcc.0c10525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Copper tungstate (CuWO4) is an important semiconductor with a sophisticated and debatable electronic structure that has a direct impact on its chemistry. Using the PAL-XFEL source, we study the electronic dynamics of photoexcited CuWO4. The Cu L3 X-ray absorption spectrum shifts to lower energy upon photoexcitation, which implies that the photoexcitation process from the oxygen valence band to the tungsten conduction band effectively increases the charge density on the Cu atoms. The decay time of this spectral change is 400 fs indicating that the increased charge density exists only for a very short time and relaxes electronically. The initial increased charge density gives rise to a structural change on a time scale longer than 200 ps.
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Affiliation(s)
- Yohei Uemura
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
- Institute
for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Ahmed S. M. Ismail
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
| | - Sang Han Park
- PAL-XFEL,
Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Soonnam Kwon
- PAL-XFEL,
Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Minseok Kim
- PAL-XFEL,
Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Yasuhiro Niwa
- Photon
Factory, Institute for Materials Structure
Science, KEK, Tsukuba 305-0801, Japan
| | - Hiroki Wadati
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Graduate
School of Material Science, University of
Hyogo, Kamigori, Hyogo 678-1297, Japan
| | - Hebatalla Elnaggar
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
| | - Federica Frati
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
| | - Ties Haarman
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
| | - Niko Höppel
- Department
of Physics and Center for Free-Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Nils Huse
- Department
of Physics and Center for Free-Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Yasuyuki Hirata
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yujun Zhang
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Kohei Yamagami
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Susumu Yamamoto
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Iwao Matsuda
- Institute
for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Tetsuo Katayama
- JASRI, Kouto, Sayo-cho, Hyogo 679-5198, Japan
- RIKEN
SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Tadashi Togashi
- JASRI, Kouto, Sayo-cho, Hyogo 679-5198, Japan
- RIKEN
SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Shigeki Owada
- JASRI, Kouto, Sayo-cho, Hyogo 679-5198, Japan
- RIKEN
SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Makina Yabashi
- RIKEN
SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Uufuk Halisdemir
- Faculty
of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 2171, 7500 AE Enschede, The Netherlands
| | - Gertjan Koster
- Faculty
of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 2171, 7500 AE Enschede, The Netherlands
| | | | - Bert M. Weckhuysen
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
| | - Frank M. F. de Groot
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
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17
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Li N, Jiang Y, Wang X, Hu C, Jiang W, Li S, Xia L. Efficient charge separation and transfer of a TaON/BiVO 4 heterojunction for photoelectrochemical water splitting. RSC Adv 2021; 11:13269-13273. [PMID: 35423882 PMCID: PMC8697503 DOI: 10.1039/d1ra00974e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 03/14/2021] [Indexed: 12/14/2022] Open
Abstract
The separation and transfer of photogenerated electron–hole pairs in semiconductors is the key point for photoelectrochemical (PEC) water splitting. Here, an ideal TaON/BiVO4 heterojunction electrode was fabricated via a simple hydrothermal method. As BiVO4 and TaON were in well contact with each other, high performance TaON/BiVO4 heterojunction photoanodes were constructed. The photocurrent of the 2-TaON/BiVO4 electrode reached 2.6 mA cm−2 at 1.23 V vs. RHE, which is 1.75 times as that of the bare BiVO4. TaON improves the PEC performance by simultaneously promoting the photo-generated charge separation and surface reaction transfer. When a Co-Pi co-catalyst was integrated onto the surface of the 2-TaON/BiVO4 electrode, the surface water oxidation kinetics further improved, and a highly efficient photocurrent density of 3.6 mA cm−2 was achieved at 1.23 V vs. RHE. The largest half-cell solar energy conversion efficiency for Co-Pi/TaON/BiVO4 was 1.19% at 0.69 V vs. RHE, corresponding to 6 times that of bare BiVO4 (0.19% at 0.95 V vs. RHE). This study provides an available strategy to develop photoelectrochemical water splitting of BiVO4-based photoanodes. TaON/BiVO4 heterojunction electrodes exhibited significant enhancement in the photoelectrochemical water oxidation.![]()
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Affiliation(s)
- Na Li
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China .,Department of Chemical and Environmental Engineering, Yingkou Institute of Technology Yingkou 115014 Liaoning China
| | - Yi Jiang
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China
| | - Xiaodi Wang
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China
| | - Chongyang Hu
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China
| | - Wenchao Jiang
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China
| | - Siyuan Li
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China
| | - Lixin Xia
- College of Chemistry, Liaoning University Shenyang 110036 Liaoning China .,Department of Chemical and Environmental Engineering, Yingkou Institute of Technology Yingkou 115014 Liaoning China
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18
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Grigioni I, Polo A, Dozzi MV, Ganzer L, Bozzini B, Cerullo G, Selli E. Ultrafast Charge Carrier Dynamics in CuWO 4 Photoanodes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:5692-5699. [PMID: 35069964 PMCID: PMC8765008 DOI: 10.1021/acs.jpcc.0c11607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/16/2021] [Indexed: 06/14/2023]
Abstract
CuWO4 is a ternary metal oxide semiconductor with promising properties for photoelectrochemical (PEC) water splitting and solar light conversion, due to its quite low band gap (2.3 eV) and high stability in an alkaline environment. Aiming at understanding the origin of the relatively low PEC efficiency attained with CuWO4 photoanodes, we here investigate transparent CuWO4 electrodes prepared by a simple solution-based method through the combination of femtosecond transient absorption spectroscopy with electrochemical, PEC, and photochromic characterizations. The very fast recombination dynamics of the charge carriers photogenerated in CuWO4, which is the reason for its low efficiency, is discussed in relation with its PEC performance and with the recently calculated band structure of this material, also in comparison with the behavior of other semiconductor oxides employed in PEC applications, in particular Fe2O3.
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Affiliation(s)
- Ivan Grigioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Annalisa Polo
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Maria Vittoria Dozzi
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Lucia Ganzer
- Department
of Physics, Politecnico di Milano, IFN-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Benedetto Bozzini
- Department
of Energy, Politecnico di Milano, via Lambruschini 4, 20156 Milano, Italy
| | - Giulio Cerullo
- Department
of Physics, Politecnico di Milano, IFN-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Elena Selli
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
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19
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Wang T, Fan X, Gao B, Jiang C, Li Y, Li P, Zhang S, Huang X, He J. Self‐Assembled Urchin‐Like CuWO
4
/WO
3
Heterojunction Nanoarrays as Photoanodes for Photoelectrochemical Water Splitting. ChemElectroChem 2020. [DOI: 10.1002/celc.202001154] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Tao Wang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Xiaoli Fan
- School of Materials Science and Engineering Nanjing Institute of Technology 211167 Nanjing PR China
| | - Bin Gao
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Cheng Jiang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Yang Li
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Peng Li
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Songtao Zhang
- Testing Center Yangzhou University Yangzhou 225009 PR China
| | - Xianli Huang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Jianping He
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
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20
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Shadabipour P, Raithel AL, Hamann TW. Charge-Carrier Dynamics at the CuWO 4/Electrocatalyst Interface for Photoelectrochemical Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:50592-50599. [PMID: 33119249 DOI: 10.1021/acsami.0c14705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Unraveling the charge-carrier dynamics at electrocatalyst/electrode interfaces is critical for the development of efficient photoelectrochemical (PEC) water oxidation. Unlike the majority of photoanodes investigated for PEC water oxidation, the integration of electrocatalysts with CuWO4 electrodes generally results in comparable or worse performance compared to the bare electrode. This is despite the fact that the surface state recombination limits the water oxidation efficiency with CuWO4 electrodes, and an electrocatalyst ought to bypass this reaction and improve performance. Here, we present results that deepen the understanding of the energetics and electron-transfer processes at the CuWO4/electrocatalyst interface, which controls the performance of such systems. Ni0.75Fe0.25Oy (denoted as Ni75) was chosen as a model electrocatalyst, and through dual-working electrode experiments, we have been able to provide significant insight into the role of the electrocatalyst on the charge-transfer process at the CuWO4/Ni75 interface. We have shown a lack of performance improvement for CuWO4/Ni75 relative to the bare electrode to water oxidation. We attribute this surprising result to water oxidation on the CuWO4 surface kinetically outcompeting hole transfer to the Ni75 electrocatalyst interface.
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Affiliation(s)
- Parisa Shadabipour
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824-1322, United States
| | - Austin L Raithel
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824-1322, United States
| | - Thomas W Hamann
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824-1322, United States
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21
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Yin Y, Wang X, Li L, Hei J, Han Y, Li L, Li M. Enhancement of Cocatalyst‐Coated ZnFe
2
O
4
Photoanode Grown In Situ on a Metallic Iron Substrate. ChemElectroChem 2020. [DOI: 10.1002/celc.202001195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yanjun Yin
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Xiaodong Wang
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Lei Li
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Jinpei Hei
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Yang Han
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Lei Li
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
| | - Mingling Li
- School of Chemistry and Material Engineering Chaohu University Chaohu 238000 China
- Engineering Technology Center of Department of Education of Anhui Province Chaohu University Chaohu 238000 China
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22
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Boosting the Activity and Stability of Copper Tungsten Nanoflakes toward Solar Water Oxidation by Iridium-Cobalt Phosphates Modification. Catalysts 2020. [DOI: 10.3390/catal10080913] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Severe interfacial electron–hole recombination greatly limits the performance of CuWO4 photoanode towards the photoelectrochemical (PEC) oxygen evolution reaction (OER). Surface modification with an OER cocatalyst can reduce electron–hole recombination and thus improve the PEC OER performance of CuWO4. Herein, we coupled CuWO4 nanoflakes (NFs) with Iridium–cobalt phosphates (IrCo-Pi) and greatly improved the photoactivity of CuWO4. The optimized photocurrent density for CuWO4/IrCo-Pi at 1.23 V vs. reversible hydrogen electrode (RHE) rose to 0.54 mA∙cm−2, a ca. 70% increase over that of bare CuWO4 (0.32 mA∙cm−2). Such improved photoactivity was attributed to the enhanced hole collection efficiency, which resulted from the reduced charge-transfer resistance via IrCo-Pi modification. Moreover, the as-deposited IrCo-Pi layer well coated the inner CuWO4 NFs and effectively prevented the photoinduced corrosion of CuWO4 in neutral potassium phosphate (KPi) buffer solution, eventually leading to a superior stability over the bare CuWO4. The facile preparation of IrCo-Pi and its great improvement in the photoactivity make it possible to design an efficient CuWO4/cocatalyst system towards PEC water oxidation.
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23
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Su J, Hisatomi T, Minegishi T, Domen K. Enhanced Photoelectrochemical Water Oxidation from CdTe Photoanodes Annealed with CdCl
2. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jin Su
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Department of Materials University of Oxford Parks Road Oxford OX1 3PH UK
| | - Takashi Hisatomi
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Initiative for Supra-Materials Interdisciplinary Cluster for Cutting Edge Research Shinshu University 4-17-1 Wakasato, Nagano-shi Nagano 380-8553 Japan
| | - Tsutomu Minegishi
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Center for Advanced Science and Technology The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8904 Japan
| | - Kazunari Domen
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Initiative for Supra-Materials Interdisciplinary Cluster for Cutting Edge Research Shinshu University 4-17-1 Wakasato, Nagano-shi Nagano 380-8553 Japan
- Current address: Office of University Professors The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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24
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Balasubramanian V, Kannan S, Thangaraj NS, Sivakumar G, Mohanraj K. Role of W‐Rich CuWO
4
and Doped Zn‐CuWO
4
Ceramics and Its Improved Photoelectrochemical Cell Performances Synthesized by Solid State Reaction Method. ChemistrySelect 2020. [DOI: 10.1002/slct.202000229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Selvaraj Kannan
- Department of PhysicsExcel Engineering College Namakkal 637 303, Tamil Nadu India
| | - Nishanthi S. Thangaraj
- Central Electrochemical Power sources divisionCentral Electrochemical Research Institute (CECRI) Karaikudi 630 003, Tamil Nadu India
| | - Ganesan Sivakumar
- CISL, Department of PhysicsAnnamalai University Annamalai nagar 608 002, Chidambaram Tamil Nadu India
| | - Kannusamy Mohanraj
- Department of PhysicsManonmaniam Sundaranar University Tirunelveli 627 012, Tamil Nadu India
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25
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Fluorine doped copper tungsten nanoflakes with enhanced charge separation for efficient photoelectrochemical water oxidation. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136471] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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26
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Polo A, Nomellini C, Grigioni I, Dozzi MV, Selli E. Effective Visible Light Exploitation by Copper Molybdo-tungstate Photoanodes. ACS APPLIED ENERGY MATERIALS 2020; 3:6956-6964. [PMID: 33829150 PMCID: PMC8016397 DOI: 10.1021/acsaem.0c01021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 06/08/2020] [Indexed: 06/02/2023]
Abstract
The need for stable oxide-based semiconductors with a narrow band gap, able to maximize the exploitation of the visible light portion of the solar spectrum, is a challenging issue for photoelectrocatalytic (PEC) applications. In the present work, CuW1-x Mo x O4 (E g = 2.0 eV for x = 0.5), which exhibits a significantly reduced optical band gap E g compared with isostructural CuWO4 (E g = 2.3 eV), was investigated as a photoactive material for the preparation of photoanodes. CuW0.5Mo0.5O4 electrodes with different thicknesses (80-530 nm), prepared by a simple solution-based process in the form of multilayer films, effectively exhibit visible light photoactivity up to 650 nm (i.e., extended compared with CuWO4 photoanodes prepared by the same way). Furthermore, the systematic investigation on the effects on photoactivity of the CuW0.5Mo0.5O4 layer thickness evidenced that long-wavelength photons can better be exploited by thicker electrodes. PEC measurements in the presence of NaNO2, acting as a suitable hole scavenger ensuring enhanced photocurrent generation compared with that of water oxidation while minimizing dark currents, allowed us to elucidate the role that molybdenum incorporation plays on the charge separation efficiency in the bulk and on the charge injection efficiency at the photoanode surface. The adopted Mo for W substitution increases the visible light photoactivity of copper tungstate toward improved exploitation and storage of visible light into chemical energy via photoelectrocatalysis.
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Affiliation(s)
- Annalisa Polo
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy
| | - Chiara Nomellini
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy
| | - Ivan Grigioni
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy
| | - Maria Vittoria Dozzi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy
| | - Elena Selli
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy
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Lhermitte CR, Polo A, Yao L, Boudoire FA, Guijarro N, Sivula K. Generalized Synthesis to Produce Transparent Thin Films of Ternary Metal Oxide Photoelectrodes. CHEMSUSCHEM 2020; 13:3645-3653. [PMID: 32372487 DOI: 10.1002/cssc.202000926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Indexed: 06/11/2023]
Abstract
Developing facile approaches to prepare non-light-scattering ternary oxide thin film photoelectrodes is an important goal for solar water splitting tandem cells. Herein, a novel synthesis route is reported that employs ethylenediaminetetraacetic acid (EDTA) to enable compatible water solubility of diverse metal cations, which affords transparent films by solution processing. By using BiVO4 as a model material, a remarkable improvement in transparency is demonstrated, quantified by the direct transmittance at 600 nm of >80 % versus the <10 % observed with state-of-the-art electrodeposited thin films while maintaining reasonable solar-driven oxidation photocurrents (1.75 mA cm-2 in the presence of a sulfite hole scavenger). Furthermore, it is demonstrated that the synthesis technique can be applied in a general fashion towards the synthesis of diverse n- and p-type metal oxide materials, such as ZnFe2 O4 and CuFeO2 .
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Affiliation(s)
- Charles R Lhermitte
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland
| | - Annalisa Polo
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133, Milano, Italy
| | - Liang Yao
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland
| | - Florent A Boudoire
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland
| | - Nestor Guijarro
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland
| | - Kevin Sivula
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland
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28
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CuMo xW (1-x)O 4 Solid Solution Display Visible Light Photoreduction of CO 2 to CH 3OH Coupling with Oxidation of Amine to Imine. NANOMATERIALS 2020; 10:nano10071303. [PMID: 32635203 PMCID: PMC7408418 DOI: 10.3390/nano10071303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 06/24/2020] [Accepted: 06/28/2020] [Indexed: 11/17/2022]
Abstract
The photoreduction of carbon dioxide (CO2) to valuable fuels is a promising strategy for the prevention of rising atmospheric levels of CO2 and the depletion of fossil fuel reserves. However, most reported photocatalysts are only active in the ultraviolet region, which necessitates co-catalysts and sacrificial agents in the reaction systems, leading to an unsatisfied economy of the process in energy and atoms. In this research, a CuMoxW(1-x)O4 solid solution was synthesized, characterized, and tested for the photocatalytic reduction of CO2 in the presence of amines. The results revealed that the yield of CH3OH from CO2 was 1017.7 μmol/g under 24 h visible light irradiation using CuW0.7Mo0.3O4 (x = 0.7) as the catalyst. This was associated with the maximum conversion (82.1%) of benzylamine to N-benzylidene benzylamine with high selectivity (>99%). These results give new insight into the photocatalytic reduction of CO2 for valuable chemical products in an economic way.
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29
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Chen C, Bi W, Xia Z, Yuan W, Li L. Hydrothermal Synthesis of the CuWO 4/ZnO Composites with Enhanced Photocatalytic Performance. ACS OMEGA 2020; 5:13185-13195. [PMID: 32548505 PMCID: PMC7288558 DOI: 10.1021/acsomega.0c01220] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/14/2020] [Indexed: 05/25/2023]
Abstract
Photocatalytic technology aiming to eliminate organic pollutants in water has been rapidly developed. In this work, we successfully synthesized CuWO4/ZnO photocatalysts with different weight ratios of CuWO4 through facile hydrothermal treatment. Crystal structures, forms, and optical properties of these as-prepared materials were investigated and analyzed. 3% CuWO4/ZnO showed the optimum photodegradation efficiency toward methylene blue under the irradiation of simulated sunlight for 120 min, the degradation rate of which was 98.9%. The pseudo-first-order rate constant of 3% CuWO4/ZnO was ∼11.3 and ∼3.5 times bigger than that of pristine CuWO4 and ZnO, respectively. Furthermore, the material exhibited high stability and reusability after five consecutive photocatalytic tests. In addition, free radical capture experiments were conducted and the possible mechanism proposed explained that the synergistic effect between CuWO4 and ZnO accelerates the photodegradation reaction. This work provides a feasible technical background for the efficient and sustainable utilization of photocatalysts in wastewater control.
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Affiliation(s)
- Caiying Chen
- Guangdong
Engineering Technology Research Center of Advanced Insulating Coating,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Wanying Bi
- Guangdong
Engineering Technology Research Center of Advanced Insulating Coating,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Zilong Xia
- Xiangyang
Cigarette Factory, China Tobacco Hubei Industrial
Company, Ltd., Xiangyang 441000, Hubei, China
| | - Wenhui Yuan
- Guangdong
Engineering Technology Research Center of Advanced Insulating Coating,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Li Li
- School
of Environment and Energy, South China University
of Technology, Guangzhou 510006, Guangdong, China
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30
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Su J, Hisatomi T, Minegishi T, Domen K. Enhanced Photoelectrochemical Water Oxidation from CdTe Photoanodes Annealed with CdCl
2. Angew Chem Int Ed Engl 2020; 59:13800-13806. [DOI: 10.1002/anie.202000688] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/25/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Jin Su
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Department of Materials University of Oxford Parks Road Oxford OX1 3PH UK
| | - Takashi Hisatomi
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Initiative for Supra-Materials Interdisciplinary Cluster for Cutting Edge Research Shinshu University 4-17-1 Wakasato, Nagano-shi Nagano 380-8553 Japan
| | - Tsutomu Minegishi
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Center for Advanced Science and Technology The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8904 Japan
| | - Kazunari Domen
- Department of Chemical System Engineering School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Research Initiative for Supra-Materials Interdisciplinary Cluster for Cutting Edge Research Shinshu University 4-17-1 Wakasato, Nagano-shi Nagano 380-8553 Japan
- Current address: Office of University Professors The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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Yuan Y, Sheng K, Zeng S, Han X, Sun L, Lončarić I, Zhan W, Sun D. Engineering Cu/TiO2@N-Doped C Interfaces Derived from an Atom-Precise Heterometallic CuII4TiIV5 Cluster for Efficient Photocatalytic Hydrogen Evolution. Inorg Chem 2020; 59:5456-5462. [DOI: 10.1021/acs.inorgchem.0c00084] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yusheng Yuan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, People’s Republic of China
| | - Kai Sheng
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People’s Republic of China
- School of Aeronautics, Shandong Jiaotong University, Jinan 250037, People’s Republic of China
| | - Suyuan Zeng
- Department of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People’s Republic of China
| | - Xiguang Han
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, People’s Republic of China
| | - Liming Sun
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, People’s Republic of China
| | - Ivor Lončarić
- Division of Theoretical Physics, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Wenwen Zhan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, People’s Republic of China
| | - Di Sun
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People’s Republic of China
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32
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Chen Z, Löber M, Rokicińska A, Ma Z, Chen J, Kuśtrowski P, Meyer HJ, Dronskowski R, Slabon A. Increased photocurrent of CuWO 4 photoanodes by modification with the oxide carbodiimide Sn 2O(NCN). Dalton Trans 2020; 49:3450-3456. [PMID: 32096805 DOI: 10.1039/c9dt04752b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Tin(ii) oxide carbodiimide is a novel prospective semiconductor material with a band gap of 2.1 eV and lies chemically between metal oxides and metal carbodiimides. We report on the photochemical properties of this oxide carbodiimide and apply the material to form a heterojunction with CuWO4 thin films for photoelectrochemical (PEC) water oxidation. Mott-Schottky experiments reveal that the title compound is an n-type semiconductor with a flat-band potential of -0.03 V and, as such, the position of the valence band edge would be suitable for photochemical water oxidation. Sn2O(NCN) increases the photocurrent of CuWO4 thin films from 32 μA cm-2 to 59 μA cm-2 at 1.23 V vs. reversible hydrogen electrode (RHE) in 0.1 M phosphate buffer (pH 7.0) under backlight AM 1.5G illumination. This upsurge in photocurrent originates in a synergistic effect between the oxide and oxide carbodiimide, because the heterojunction photoanode displays a higher current density than the sum of its individual components. Structural analysis by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) reveals that Sn2O(NCN) forms a core-shell structure Sn2O(NCN)@SnPOx during the PEC water oxidation in phosphate buffer. The electrochemical activation is similar to the behavior of Mn(NCN) but different from Co(NCN).
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Affiliation(s)
- Zheng Chen
- Chair of Solid-State and Quantum Chemistry, Institute of Inorganic Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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33
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Hydrogenation of ZnFe2O4 Flat Films: Effects of the Pre-Annealing Temperature on the Photoanodes Efficiency for Water Oxidation. SURFACES 2020. [DOI: 10.3390/surfaces3010009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effects induced by post-synthesis hydrogenation on ZnFe2O4 flat films in terms of photoelectrochemical (PEC) performance of photoanodes for water oxidation have been deeply investigated as a function of the pre-annealing temperature of the materials. The structure and morphology of the films greatly affect the efficacy of the post synthesis treatment. In fact, highly compact films are obtained upon pre-annealing at high temperatures, and this limits the exposure of the material bulk to the reductive H2 atmosphere, making the treatment largely ineffective. On the other hand, a mild hydrogen treatment greatly enhances the separation of photoproduced charges in films pre-annealed at lower temperatures, as a result of the introduction of oxygen vacancies with n-type character. A comparison between present results and those obtained with ZnFe2O4 nanorods clearly demonstrates that specific structural and/or surface properties, together with the initial film morphology, differently affect the overall contribution of post-synthesis hydrogenation on the efficiency of zinc ferrite-based photoanodes.
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34
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Chinnasamy M, Balasubramanian K. Effect of laser power on force constant and phonon lifetime of stretching and bending vibration of Cu-doped WO 3 nanostructures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 225:117514. [PMID: 31521002 DOI: 10.1016/j.saa.2019.117514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
The influence of Cu-doping on their structural, vibrational and morphological properties of hydrothermally prepared Cu-doped WO3 has been studied. X-ray Diffraction studies confirm the tetragonal structure of WO3 and lower angle shift in doped samples indicates the incorporation of Cu in tungsten sites. Field emission scanning electron microscopy (FESEM) images exhibit micro rod-like morphology of the as-synthesized WO3 materials shows microstructure with rod-like projections slowly changes into nanorods and plates for doped samples. The absorption peak of pure and Cu-doped WO3 occurs in the region of 200 to 350 nm and centered at 314 nm. In Raman spectra, prominent peaks of WO3 have appeared at 676 and 810 cm-1 which represent the stretching mode of υa (OWO). Peak around 240 cm-1 represents the bending vibration of υ (WOW). Another peak at 322 cm-1 is the deformation mode δ (OWO). Force constant of the prepared samples has been calculated from the blue shift obtained in both stretching and bending vibrational mode by varying laser power from 0.045 to 11.25 mW. Phonon lifetime has been calculated by deconvoluting the peaks using Lorentzian function.
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Affiliation(s)
- Madhumitha Chinnasamy
- Nanophotonics Laboratory, Department of Physics, National Institute of Technology, Tiruchirapalli 620015, Tamilnadu, India
| | - Karthikeyan Balasubramanian
- Nanophotonics Laboratory, Department of Physics, National Institute of Technology, Tiruchirapalli 620015, Tamilnadu, India.
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35
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Guo W, Wang Y, Lian X, Nie Y, Tian S, Wang S, Zhou Y, Henkelman G. Insights into the multiple effects of oxygen vacancies on CuWO 4 for photoelectrochemical water oxidation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01430c] [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
For CuWO4, oxygen vacancies can shorten the electron transfer time and boost the water oxidation kinetics, but they aggravate the charge recombination on the surface.
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Affiliation(s)
- Wenlong Guo
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Ya Wang
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Xin Lian
- College of Chemistry and Chemical Engineering
- Chongqing University of Science and Technology
- Chongqing
- PR China
| | - Yao Nie
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Shijia Tian
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Shanshan Wang
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Yun Zhou
- Chongqing Key Laboratory of Green Synthesis and Applications
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- P. R. China
| | - Graeme Henkelman
- Department of Chemistry and the Oden Institute for Computational Engineering and Sciences
- The University of Texas
- Austin
- USA
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36
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Boosting water oxidation performance of CuWO4 photoanode by surface modification of nickel phosphate. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.135125] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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37
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Li K, Zhang C, Li X, Du Y, Yang P, Zhu M. A nanostructured CuWO4/Mn3O4 with p/n heterojunction as photoanode toward enhanced water oxidation. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Yang J, Li C, Diao P. Molybdenum doped CuWO4 nanoflake array films as an efficient photoanode for solar water splitting. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.044] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Photoelectrochemical water oxidation at FTO|WO3@CuWO4 and FTO|WO3@CuWO4|BiVO4 heterojunction systems: An IMPS analysis. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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40
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Thang HV, Albanese E, Pacchioni G. Electronic structure of CuWO 4: dielectric-dependent, self-consistent hybrid functional study of a Mott-Hubbard type insulator. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:145503. [PMID: 30650395 DOI: 10.1088/1361-648x/aaff3e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
CuWO4 is a semiconducting oxide with interesting applications in photocatalysis. In this paper we present an accurate study of the electronic properties of stoichiometric and oxygen deficient CuWO4 based on a dielectric dependent hybrid density functional. In CuWO4 the Cu ions (Cu2+) are in a 3d9 configuration, so that the material must be classified as a magnetic insulator. Various magnetic configurations of CuWO4 have been considered, the most stable configuration being anti-ferromagnetic. The band structure, described in terms of density of states (DOS), exhibit the presence of a wide band dominated by W 5d states, separated by about 5 eV from the top of the valence band (VB), consisting of O 2p states partly mixed with Cu 3d states. The empty component of the Cu 3d orbitals forms a narrow band 3.6 eV above the VB maximum. The electronic structure emerging from the DOS curves and the Kohn-Sham energies is hard to reconcile with an experimental band gap of 2.1-2.3 eV. This gap can be rationalized within the Mott-Hubbard model of magnetic insulators, and has been computed from the total energies of the system with one electron removed from the O 2p band and one electron added to the Cu 3d states. Computing the charge transition levels for CuWO4, we come to a theoretical band gap of 2.1 eV, in excellent agreement with the experimental observations. We also studied the nature of the oxygen vacancy in CuWO4 with particular attention to the electron redistribution following the oxygen removal. The excess electrons, in fact, can occupy the localized 3d states of Cu or the localized 5d states of W. The resulting solution depends on various factors, including the concentration of oxygen vacancies.
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Affiliation(s)
- Ho Viet Thang
- Departimento di Scienza dei Materiali, Università di Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy
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41
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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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42
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Kinetic study of Z-scheme C3N4/CuWO4 photocatalyst towards solar light inactivation of mixed populated bacteria. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.08.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Salimi R, Sabbagh Alvani AA, Mei BT, Naseri N, Du SF, Mul G. Ag-Functionalized CuWO 4/WO 3 nanocomposites for solar water splitting. NEW J CHEM 2019. [DOI: 10.1039/c8nj05625k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A new plasmonic Ag-functionalized CuWO4/WO3 hetero-structured photoanode was successfully prepared via a PVP-assisted sol–gel (PSG) route and electrophoretic deposition which reveals 4 times enhanced photocurrent density compared with pristine WO3.
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Affiliation(s)
- R. Salimi
- Color & Polymer Research Center, Amirkabir University of Technology (Tehran Polytechnic)
- Tehran
- Iran
- Department of Polymer Engineering and Color Technology
- Amirkabir University of Technology
| | - A. A. Sabbagh Alvani
- Color & Polymer Research Center, Amirkabir University of Technology (Tehran Polytechnic)
- Tehran
- Iran
- Department of Polymer Engineering and Color Technology
- Amirkabir University of Technology
| | - B. T. Mei
- Photocatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
- Enschede
- The Netherlands
| | - N. Naseri
- Department of Physics, Sharif University of Technology
- Tehran
- Iran
- Condensed Matter National Laboratory, Institute for Research in Fundamental Sciences
- Tehran
| | - S. F. Du
- School of Chemical Engineering, University of Birmingham
- Birmingham
- UK
| | - G. Mul
- Photocatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
- Enschede
- The Netherlands
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44
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Hua E, Jin S, Ni S, Xu X. Double perovskite compounds A2CuWO6 (A = Sr and Ba) with p-type semiconductivity for photocatalytic water oxidation under visible light illumination. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00675c] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sr2CuWO6 and Ba2CuWO6 are novel p-type semiconductors that work well for photocatalytic water oxidation under visible light illumination.
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Affiliation(s)
- Erbing Hua
- Clinical and Central Lab
- Putuo People's Hospital
- Tongji University
- Shanghai
- China
| | - Shu Jin
- Clinical and Central Lab
- Putuo People's Hospital
- Tongji University
- Shanghai
- China
| | - Shuang Ni
- Science and Technology on Plasma Physics Laboratory
- Laser Fusion Research Center
- China Academy of Engineering Physics
- Mianyang 621900
- China
| | - Xiaoxiang Xu
- Clinical and Central Lab
- Putuo People's Hospital
- Tongji University
- Shanghai
- China
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45
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Venugopal A, Smith WA. Light induced formation of a surface heterojunction in photocharged CuWO4 photoanodes. Faraday Discuss 2019; 215:175-191. [DOI: 10.1039/c8fd00179k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocharging of CuWO4 photoanodes enhances its water oxidation kinetics as a result of improved charge separation near the electrode/electrolyte interface post photocharging.
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Affiliation(s)
- Anirudh Venugopal
- Materials for Energy Conversion and Storage (MECS)
- Department of Chemical Engineering
- Faculty of Applied Sciences
- Delft University of Technology
- Delft 2629HZ
| | - Wilson A. Smith
- Materials for Energy Conversion and Storage (MECS)
- Department of Chemical Engineering
- Faculty of Applied Sciences
- Delft University of Technology
- Delft 2629HZ
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46
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Cho HE, Yun G, Arunachalam M, Ahn KS, Kim CS, Lim DH, Kang SH. Nanolayered CuWO4 Decoration on Fluorine-Doped SnO2 Inverse Opals for Solar Water Oxidation. J ELECTROCHEM SCI TE 2018. [DOI: 10.33961/jecst.2018.9.4.282] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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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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48
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Mohanty B, Naik KK, Sahoo S, Jena B, Chakraborty B, Rout CS, Jena BK. Efficient Photoelectrocatalytic Activity of CuWO4
Nanoplates towards the Oxidation of NADH Driven in Visible Light. ChemistrySelect 2018. [DOI: 10.1002/slct.201801137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Bishnupad Mohanty
- CSIR-Institute of Minerals and Materials Technology; Bhubaneswar, Odisha; India-751013
- Department of Chemistry; Utkal University; Bhubaneswar-751004 Odisha
| | - Kusha Kumar Naik
- School of Basic Sciences; Indian Institute of Technology, Bhubaneswar, Odisha; India-751013
| | - Satyapriya Sahoo
- CSIR-Institute of Minerals and Materials Technology; Bhubaneswar, Odisha; India-751013
| | - Bijayalaxmi Jena
- Department of Chemistry; Utkal University; Bhubaneswar-751004 Odisha
| | | | - Chandra Sekhar Rout
- Centre for Nano and Material Sciences; Jain University; Jain Global Campus, Ramanagaram; Bangalore-562112, India
| | - Bikash Kumar Jena
- CSIR-Institute of Minerals and Materials Technology; Bhubaneswar, Odisha; India-751013
- Academy of Scientific & Innovative Research, New Delhi, India-110001
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49
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Controlling shape anisotropy of hexagonal CdS for highly stable and efficient photocatalytic H2 evolution and photoelectrochemical water splitting. J Colloid Interface Sci 2018; 518:140-148. [DOI: 10.1016/j.jcis.2018.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/02/2018] [Accepted: 02/04/2018] [Indexed: 12/26/2022]
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50
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Jiang CM, Segev G, Hess LH, Liu G, Zaborski G, Toma FM, Cooper JK, Sharp ID. Composition-Dependent Functionality of Copper Vanadate Photoanodes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10627-10633. [PMID: 29489326 DOI: 10.1021/acsami.8b02977] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To understand functional roles of constituent elements in ternary metal oxide photoanodes, essential photoelectrochemical (PEC) properties are systematically analyzed on a series of copper vanadate compounds with different Cu:V elemental ratios. Homogeneous and highly continuous thin films of β-Cu2V2O7, γ-Cu3V2O8, Cu11V6O26, and Cu5V2O10 are grown via reactive co-sputtering and their performance characteristics for the light-driven oxygen evolution reaction are evaluated. All four compounds have similar bandgaps in the range of 1.83-2.03 eV, though Cu-rich phases exhibit stronger optical absorption and higher charge separation efficiencies. Transient photocurrent analysis reveals a reduction of surface catalytic activity with increasing Cu:V elemental ratio due to competitive charge recombination at Cu-related surface states. This comprehensive analysis of PEC functionalities-including photon absorption, carrier separation, and heterogeneous charge transfer-informs strategies for improving PEC activity in the copper vanadate materials system and provides insights that may aid discovery, design, and engineering of new photoelectrode materials.
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Affiliation(s)
| | | | | | | | | | | | | | - Ian D Sharp
- Walter Schottky Institut and Physik Department , Technische Universität München , Am Coulombwall 4 , 85748 Garching , Germany
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