1
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Nalbandyan VB, Vasilchikova TM, Zakharov KV, Vasiliev AN, Evstigneeva MA, Guda AA. Preparation and Properties of a High-Entropy Wolframite-Type Antiferromagnet, (Mn 0.2Co 0.2Ni 0.2Cu 0.2Cd 0.2)WO 4. Inorg Chem 2024; 63:10099-10102. [PMID: 38768193 DOI: 10.1021/acs.inorgchem.3c04430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The homogeneous high-entropy wolframite-type solid solution (Mn1/5Co1/5Ni1/5Cu1/5Cd1/5)WO4 was prepared by solid-state reaction at 1000 °C. Elongated "crystals" were grown from the Na2WO4 flux, but their strongly broadened powder X-ray diffraction patterns indicated partial dissolution. Nevertheless, successive annealing of the homogeneous solid solution for 3-4 h at 800, 700, and 600 °C did not bring any sign of dissolution. Thus, the material is kinetically stable at low temperatures although thermodynamically unstable. The long-range antiferromagnetic order was established at TN ∼ 24.8 K. Based on magnetization and specific heat measurements, a magnetic phase diagram was built, demonstrating the presence of an additional field-induced phase. In contrast to the parent MnWO4, no dielectric anomaly has been found down to 2 K.
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Affiliation(s)
| | - Tatyana M Vasilchikova
- National University of Science and Technology "MISiS", Moscow 119049, Russia
- Lomonosov Moscow State University, Moscow 119991, Russia
| | | | - Alexander N Vasiliev
- National University of Science and Technology "MISiS", Moscow 119049, Russia
- Lomonosov Moscow State University, Moscow 119991, Russia
| | | | - Alexander A Guda
- The Smart Materials Research Institute, Sladkova 178/24, Rostov-on-Don 344090, Russia
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2
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Pereira PFDS, De Foggi CC, Gouveia AF, Pinatti IM, Cabral LA, Guillamon E, Sorribes I, San-Miguel MA, Vergani CE, Simões AZ, da Silva EZ, Cavalcante LS, Llusar R, Longo E, Andrés J. Disclosing the Biocide Activity of α-Ag2−2xCuxWO4 (0 ≤ x ≤ 0.16) Solid Solutions. Int J Mol Sci 2022; 23:ijms231810589. [PMID: 36142511 PMCID: PMC9504239 DOI: 10.3390/ijms231810589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 02/02/2023] Open
Abstract
In this work, α-Ag2−2xCuxWO4 (0 ≤ x ≤ 0.16) solid solutions with enhanced antibacterial (against methicillin-resistant Staphylococcus aureus) and antifungal (against Candida albicans) activities are reported. A plethora of techniques (X-ray diffraction with Rietveld refinements, inductively coupled plasma atomic emission spectrometry, micro-Raman spectroscopy, attenuated total reflectance–Fourier transform infrared spectroscopy, field emission scanning electron microscopy, ultraviolet–visible spectroscopy, photoluminescence emissions, and X-ray photoelectron spectroscopy) were employed to characterize the as-synthetized samples and determine the local coordination geometry of Cu2+ cations at the orthorhombic lattice. To find a correlation between morphology and biocide activity, the experimental results were sustained by first-principles calculations at the density functional theory level to decipher the cluster coordinations and electronic properties of the exposed surfaces. Based on the analysis of the under-coordinated Ag and Cu clusters at the (010) and (101) exposed surfaces, we propose a mechanism to explain the biocide activity of these solid solutions.
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Affiliation(s)
- Paula Fabiana dos Santos Pereira
- CDMF, LIEC, Department of Chemistry, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-905, SP, Brazil
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Camila Cristina De Foggi
- Department of Conservative Dentistry, Faculty of Dental Sciences, Federal University of Rio Grande do Sul, Rio Grande do Sul 90035-004, RS, Brazil
| | - Amanda Fernandes Gouveia
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
- Institute of Chemistry, State University of Campinas (Unicamp), Campinas 13083-859, SP, Brazil
| | - Ivo Mateus Pinatti
- Department of Chemistry, Federal University of Maranhao, Avenida dos Portugueses, 1966, São Luís 65080-805, MA, Brazil
| | - Luís Antônio Cabral
- Institute of Physics, “Gleb Wataghin” (IFGW), State University of Campinas, Campinas 13083-859, SP, Brazil
| | - Eva Guillamon
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Iván Sorribes
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Miguel A. San-Miguel
- Institute of Chemistry, State University of Campinas (Unicamp), Campinas 13083-859, SP, Brazil
| | - Carlos Eduardo Vergani
- Departamento de Materiais Odontológicos e Prótese, Faculdade de Odontologia de Araraquara, São Paulo State University (UNESP), P.O. Box 1680, Araraquara 14801-903, SP, Brazil
| | - Alexandre Zirpoli Simões
- Faculty of Engineering of Guaratinguetá, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil
| | - Edison Z. da Silva
- Institute of Physics, “Gleb Wataghin” (IFGW), State University of Campinas, Campinas 13083-859, SP, Brazil
| | - Laécio Santos Cavalcante
- PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina 64002-150, PI, Brazil
| | - Rosa Llusar
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Elson Longo
- CDMF, LIEC, Department of Chemistry, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-905, SP, Brazil
| | - Juan Andrés
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
- Correspondence:
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3
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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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4
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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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5
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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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6
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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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7
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Proctor AD, Panuganti S, Bartlett BM. CuWO4 as a photocatalyst for room temperature aerobic benzylamine oxidation. Chem Commun (Camb) 2018; 54:1101-1104. [DOI: 10.1039/c7cc07611h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report the first example of a controlled photo-oxidation reaction on CuWO4, the aerobic oxidative coupling of benzylamine.
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8
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Souza ELS, Sczancoski JC, Nogueira IC, Almeida MAP, Orlandi MO, Li MS, Luz RAS, Filho MGR, Longo E, Cavalcante LS. Structural evolution, growth mechanism and photoluminescence properties of CuWO 4 nanocrystals. ULTRASONICS SONOCHEMISTRY 2017; 38:256-270. [PMID: 28633825 DOI: 10.1016/j.ultsonch.2017.03.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/06/2017] [Accepted: 03/06/2017] [Indexed: 05/27/2023]
Abstract
Copper tungstate (CuWO4) crystals were synthesized by the sonochemistry (SC) method, and then, heat treated in a conventional furnace at different temperatures for 1h. The structural evolution, growth mechanism and photoluminescence (PL) properties of these crystals were thoroughly investigated. X-ray diffraction patterns, micro-Raman spectra and Fourier transformed infrared spectra indicated that crystals heat treated and 100°C and 200°C have water molecules in their lattice (copper tungstate dihydrate (CuWO4·2H2O) with monoclinic structure), when the crystals are calcinated at 300°C have the presence of two phase (CuWO4·2H2O and CuWO4), while the others heat treated at 400°C and 500°C have a single CuWO4 triclinic structure. Field emission scanning electron microscopy revealed a change in the morphological features of these crystals with the increase of the heat treatment temperature. Transmission electron microscopy (TEM), high resolution-TEM images and selected area electron diffraction were employed to examine the shape, size and structure of these crystals. Ultraviolet-Visible spectra evidenced a decrease of band gap values with the increase of the temperature, which were correlated with the reduction of intermediary energy levels within the band gap. The intense photoluminescence (PL) emission was detected for the sample heat treat at 300°C for 1h, which have a mixture of CuWO4·2H2O and CuWO4 phases. Therefore, there is a synergic effect between the intermediary energy levels arising from these two phases during the electronic transitions responsible for PL emissions.
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Affiliation(s)
- E L S Souza
- PPGQ-CCN-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, 64002-150 Teresina, PI, Brazil
| | - J C Sczancoski
- DQ-UFSCar, Universidade Federal de São Carlos, P.O. Box 676, São Carlos, SP 13565-905, Brazil
| | - I C Nogueira
- ICE-Universidade Federal do Amazonas, Av. Rodrigo Otávio Japiim, P.O. Box 670, 69077-000 Manaus, AM, Brazil
| | - M A P Almeida
- CCT-Universidade Federal do Maranhão, P.O. Box 322, 65080-805 São Luís, MA, Brazil
| | - M O Orlandi
- Departamento de Físico-Química, Universidade Estadual Paulista, 14800-060 Araraquara, SP, Brazil
| | - M S Li
- IFSC-Universidade de São Paulo, P.O. Box 369, 13560-970 São Carlos, SP, Brazil
| | - R A S Luz
- PPGQ-CCN-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, 64002-150 Teresina, PI, Brazil
| | - M G R Filho
- PPGQ-CCN-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, 64002-150 Teresina, PI, Brazil
| | - E Longo
- Departamento de Físico-Química, Universidade Estadual Paulista, 14800-060 Araraquara, SP, Brazil
| | - L S Cavalcante
- PPGQ-CCN-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, 64002-150 Teresina, PI, Brazil.
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9
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Pereira PFS, Santos CC, Gouveia AF, Ferrer MM, Pinatti IM, Botelho G, Sambrano JR, Rosa ILV, Andrés J, Longo E. α-Ag2–2xZnxWO4 (0 ≤ x ≤ 0.25) Solid Solutions: Structure, Morphology, and Optical Properties. Inorg Chem 2017; 56:7360-7372. [DOI: 10.1021/acs.inorgchem.7b00201] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paula F. S. Pereira
- CDMF,
LIEC, São Paulo State University, P.O. Box 355, Araraquara 14800-900, Brazil
| | - Clayane C. Santos
- CDMF,
LIEC, Federal University of São Carlos, P.O. Box 676, São Carlos 13565-905, Brazil
| | - Amanda F. Gouveia
- CDMF,
LIEC, Federal University of São Carlos, P.O. Box 676, São Carlos 13565-905, Brazil
| | - Mateus M. Ferrer
- Modeling
and Molecular Simulations Group, São Paulo State University, P.O. Box 473, Bauru 17033-360, Brazil
| | - Ivo M. Pinatti
- CDMF,
LIEC, Federal University of São Carlos, P.O. Box 676, São Carlos 13565-905, Brazil
| | - Gleice Botelho
- CDMF,
LIEC, Federal University of São Carlos, P.O. Box 676, São Carlos 13565-905, Brazil
| | - Julio R. Sambrano
- Modeling
and Molecular Simulations Group, São Paulo State University, P.O. Box 473, Bauru 17033-360, Brazil
| | - Ieda L. V. Rosa
- CDMF,
LIEC, Federal University of São Carlos, P.O. Box 676, São Carlos 13565-905, Brazil
| | - Juan Andrés
- Department
of Analytical and Physical Chemistry, University Jaume I, Castelló 12071, Spain
| | - Elson Longo
- CDMF,
LIEC, São Paulo State University, P.O. Box 355, Araraquara 14800-900, Brazil
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10
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Lhermitte CR, Bartlett BM. Advancing the Chemistry of CuWO4 for Photoelectrochemical Water Oxidation. Acc Chem Res 2016; 49:1121-9. [PMID: 27227377 DOI: 10.1021/acs.accounts.6b00045] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Photoelectrochemical (PEC) cells are an ongoing area of exploration that provide a means of converting solar energy into a storable chemical form (molecular bonds). In particular, using PEC cells to drive the water splitting reaction to obtain H2 could provide a clean and sustainable route to convert solar energy into chemical fuels. Since the discovery of catalytic water splitting on TiO2 photoelectrodes by Fujishima and Honda, significant efforts have been directed toward developing high efficiency metal oxides to use as photocatalysts for this reaction. Improving the efficiency of PEC cells requires developing chemically stable, and highly catalytic anodes for the oxygen-evolution reaction (OER). This water oxidation half reaction requires four protons and four electrons coupling in two bond making steps to form O2, which limits the rate. Our group has accelerated efforts in CuWO4 as a candidate for PEC OER chemistry. Its small band gap of 2.3 eV allows for using visible light to drive OER, and the reaction proceeds with a high degree of chemoselectivity, even in the presence of more kinetically accessible anions such as chloride, which is common to seawater. Furthermore, CuWO4 is a chemically robust material when subjected to the highly oxidizing conditions of PEC OER. The next steps for accelerating research using this (and other), ternary phase oxides, is to move beyond reporting the basic PEC measurements to understanding fundamental chemical reaction mechanisms operative during OER on semiconductor surfaces. In this Account, we outline the process for PEC OER on CuWO4 thin films with emphasis on the chemistry of this reaction, the reaction rate and selectivity (determined by controlled-potential coulometry and oxygen-detection experiments). We discuss key challenges with CuWO4 such as slow kinetics and the presence of an OER-mediating mid-gap state, probed by electrochemical impedance spectroscopy. We propose that this mid-gap state imparts the observed chemoselectivity of OER on CuWO4. We introduce insights into the chemical mechanism of PEC OER on CuWO4 using Tafel analysis of electrochemical polarization. We measure Tafel slopes of ∼161 mV/dec, showing that PEC OER proceeds at a slower rate on CuWO4 than on common electrocatalysts for this reaction. Moreover, the observed photocurrent is independent of the borate buffer concentration, signaling that the buffer plays no role in the rate-determining elementary step of the reaction. Finally, we explore some recent developments in doping this material with Co (a known electrocatalytically active metal) and in coupling it with a transparent manganese phosphate (MnPO) electrocatalyst. We find that introducing Co into the wolframite structure leads to detrimental recombination of photogenerated charge carriers. However, coupling CuWO4 with MnPO increases the photocurrent density. Despite some of these challenges, CuWO4 proves to be a robust, visible light absorbing photoanode that can oxidize water with a high degree of selectivity and is therefore worthy of further exploration. Even if new compositions emerge that show better reactivity, this material serves as an excellent proving ground for the common challenges in developing ternary-phase oxides and other compositionally complex materials.
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Affiliation(s)
- Charles R. Lhermitte
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Bart M. Bartlett
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
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11
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Patureau P, Josse M, Dessapt R, Mevellec JY, Porcher F, Maglione M, Deniard P, Payen C. Incorporation of Jahn–Teller Cu2+ Ions into Magnetoelectric Multiferroic MnWO4: Structural, Magnetic, and Dielectric Permittivity Properties of Mn1–xCuxWO4 (x ≤ 0.25). Inorg Chem 2015; 54:10623-31. [DOI: 10.1021/acs.inorgchem.5b01416] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pascaline Patureau
- Institut
des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR 6502, 2 rue de la Houssinière, F-44300 Nantes, France
| | | | - Rémi Dessapt
- Institut
des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR 6502, 2 rue de la Houssinière, F-44300 Nantes, France
| | - Jean-Yves Mevellec
- Institut
des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR 6502, 2 rue de la Houssinière, F-44300 Nantes, France
| | - Florence Porcher
- Laboratoire
Léon Brillouin, CEA Saclay, CNRS UMR12, F-91191 Gif-sur-Yvette, France
| | | | - Philippe Deniard
- Institut
des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR 6502, 2 rue de la Houssinière, F-44300 Nantes, France
| | - Christophe Payen
- Institut
des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR 6502, 2 rue de la Houssinière, F-44300 Nantes, France
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12
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Bohra D, Smith WA. Improved charge separation via Fe-doping of copper tungstate photoanodes. Phys Chem Chem Phys 2015; 17:9857-66. [DOI: 10.1039/c4cp05565a] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By doping CuWO4 photoanodes with Fe, the charge separation efficiency and incident photon-to-current conversion efficiencies have increased dramatically, leading to improvements in the fundamentally limiting processes in this material. These results offer new methods and insights into improved solar water splitting photoelectrodes.
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Affiliation(s)
- Divya Bohra
- Materials for Energy Conversion and Storage
- Department of Chemical Engineering
- Delft University of Technology
- 2628 BL Delft
- The Netherlands
| | - Wilson A. Smith
- Materials for Energy Conversion and Storage
- Department of Chemical Engineering
- Delft University of Technology
- 2628 BL Delft
- The Netherlands
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13
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Huang H, Wang S, Zhang Y, Chu PK. Band gap engineering design for construction of energy-levels well-matched semiconductor heterojunction with enhanced visible-light-driven photocatalytic activity. RSC Adv 2014. [DOI: 10.1039/c4ra05708b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Energy-levels well-matched Mg1−xCuxWO4/Bi2WO6 heterojunction was constructed based on band gap engineering. It exhibits high visible-light photoactivity for RhB degradation and photocurrent generation.
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Affiliation(s)
- Hongwei Huang
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing, PR China
| | - Shuobo Wang
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing, PR China
| | - Yihe Zhang
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing, PR China
| | - Paul K. Chu
- Department of Physics and Materials Science
- City University of Hong Kong
- Kowloon, China
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