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Razali NAM, Salleh WNW, Mohamed MA, Aziz F, Jye LW, Yusof N, Ismail AF. Visible light- and dark-driven degradation of palm oil mill effluent (POME) over g-C 3N 4 and photo-rechargeable WO 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34081-4. [PMID: 38958863 DOI: 10.1007/s11356-024-34081-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 06/18/2024] [Indexed: 07/04/2024]
Abstract
The investigations of real industrial wastewater, such as palm oil mill effluent (POME), as a recalcitrant pollutant remain a subject of global water pollution concern. Thus, this work introduced the preparation and modification of g-C3N4 and WO3 at optimum calcination temperature, where they were used as potent visible light-driven photocatalysts in the degradation of POME under visible light irradiation. Herein, g-C3N4-derived melamine and WO3 photocatalyst were obtained at different calcination temperatures in order to tune their light absorption ability and optoelectronics properties. Both photocatalysts were proven to have their distinct phases, crystallinity levels, and elements with increasing temperature, as demonstrated by the ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) results. Significantly, g-C3N4 (580 °C) and WO3 (450 °C) unitary photocatalysts exhibited the highest removal efficiency of POME without dilution due to good crystallinity, extended light absorption, high separation, and less recombination efficiency of electron-hole pairs. Furthermore, surprisingly, the superior energy storage photocatalytic performance with outstanding stability by WO3 achieved an approximately 10% increment during darkness, compared with g-C3N4 under visible light irradiation. Moreover, it has been proven that the WO3 and g-C3N4 photocatalysts are desirable photocatalysts for various pollutant degradations, with excellent visible-light utilization and favorable energy storage application.
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Affiliation(s)
- Nur Aqilah Mohd Razali
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Wan Norharyati Wan Salleh
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
| | | | - Farhana Aziz
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Lau Woei Jye
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Norhaniza Yusof
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
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2
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Alruwaili M, Roy A, Alhabradi M, Yang X, Chang H, Tahir AA. Heterostructured WO 3-TiVO 4 thin-film photocatalyst for efficient photoelectrochemical water splitting. Heliyon 2024; 10:e25446. [PMID: 38322971 PMCID: PMC10844574 DOI: 10.1016/j.heliyon.2024.e25446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/18/2024] [Accepted: 01/26/2024] [Indexed: 02/08/2024] Open
Abstract
Photoelectrochemical water splitting via solar irradiation has garnered significant interest due to its potential in large-scale renewable hydrogen production. Heterostructure materials have emerged as an effective strategy, demonstrating enhanced performance in photoelectrochemical water-splitting applications compared to individual photocatalysts. In this study, to augment the performance of sprayed TiVO4 thin films, a hydrothermally prepared WO3 underlayer was integrated beneath the spray pyrolised TiVO4 film. The consequent heterostructure demonstrated notable enhancements in optical, structural, microstructural attributes, and photocurrent properties. This improvement is attributed to the strategic deposition of WO3 underlayer, forming a heterostructure composite electrode. This led to a marked increase in photocurrent density for the WO3/TiVO4 photoanode, reaching a peak of 740 μA/cm2 at an applied potential of 1.23 V vs RHE, about nine-fold that of standalone TiVO4. Electrochemical impedance spectroscopy revealed a reduced semicircle for the heterostructure, indicating improved charge transfer compared to bare TiVO4. The heterostructure photoelectrode exhibited enhanced charge carrier conductivity at the interface and sustained stability over 3 h. The distinct attributes of heterostructure photoelectrode present significant opportunities for devising highly efficient sunlight-driven water-splitting systems.
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Affiliation(s)
- Manal Alruwaili
- Solar Energy Research Group, Environment and Sustainability Institute, Faculty of Environment, Science and Economy, University of Exeter, Penryn, TR10 9FE, United Kingdom
- Physics Department, Jouf University, P.O. Box 2014, Sakaka, 42421, Saudi Arabia
| | - Anurag Roy
- Solar Energy Research Group, Environment and Sustainability Institute, Faculty of Environment, Science and Economy, University of Exeter, Penryn, TR10 9FE, United Kingdom
| | - Mansour Alhabradi
- Solar Energy Research Group, Environment and Sustainability Institute, Faculty of Environment, Science and Economy, University of Exeter, Penryn, TR10 9FE, United Kingdom
- Department of Physics, Majmaah University, Majmaah, 11952, Saudi Arabia
| | - Xiuru Yang
- Solar Energy Research Group, Environment and Sustainability Institute, Faculty of Environment, Science and Economy, University of Exeter, Penryn, TR10 9FE, United Kingdom
| | - Hong Chang
- Department of Engineering, Science and Economy, University of Exeter, Exeter, EX4 4QF, United Kingdom
| | - Asif Ali Tahir
- Solar Energy Research Group, Environment and Sustainability Institute, Faculty of Environment, Science and Economy, University of Exeter, Penryn, TR10 9FE, United Kingdom
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3
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Jung J, Jeong JR, Dang Van C, Yoo HY, Lee MH. Morphology-Controlled ZnO@ZnWO 4 Hetero-Nanostructures for Efficient Photooxidation of Water in Near-Neutral pH. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4700-4707. [PMID: 38241524 DOI: 10.1021/acsami.3c16104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
One-dimensional ZnO nanorods (NRs) have been extensively studied as photoanodes because of their unique optical properties, high electron mobility, and suitable band positions for water oxidation. However, their practical efficiency is often compromised by chemical instability during water oxidation and high carrier recombination rates. To overcome this issue, precise morphological control of ZnO@ZnWO4 core-shell structured photoanodes, featuring a ZnO core and a ZnWO4 shell was used. This was accomplished by depositing WO3 onto hydrothermally grown ZnO NRs using the thermal chemical vapor deposition process. The photoelectrochemical performance of ZnO@ZnWO4 with an optimized morphology outperforms that of pristine ZnO NRs. Systematic optical and electrochemical analyses of ZnO@ZnWO4 demonstrated that the enhancement is attributed to the enhanced charge transfer efficiency facilitated by the optimized ZnWO4 shells.
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Affiliation(s)
- Jaemin Jung
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Jae Ryeol Jeong
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Cu Dang Van
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Hye Yeon Yoo
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Min Hyung Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
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4
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Albukhari SM, Al-Hajji LA, Ismail AA. Minimizing CO 2 emissions by photocatalytic CO 2 reduction to CH 3OH over Li 2MnO 3/WO 3 heterostructures under visible illumination. ENVIRONMENTAL RESEARCH 2024; 241:117573. [PMID: 37956755 DOI: 10.1016/j.envres.2023.117573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/16/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
Photocatalytic CO2 reduction to valuable fuels has proved to be a favourable process to produce renewable energy and reduce CO2 emissions, which mostly depends on designing effective photocatalysts with the rapid separation rate of charge carriers. In this contribution, mesoporous n-n heterojunction Li2MnO3/WO3 nanocomposites were designed via a simplistic sol-gel process for CO2 reduction utilizing visible illumination (λ > 420 nm). XRD and TEM measurements confirmed the synthesized Li2MnO3/WO3 nanocomposite is a monoclinic structure, and its particle size is 25 ± 5 nm. The obtained Li2MnO3/WO3 exhibited narrower bandgap energy (1.74 eV), larger surface area (212 m2g-1), exceedingly visible absorbing, and lower recombination of electron and hole. The yield of CH3OH was determined about 198, 871, 1140, 1550 and 1570 mmolg-1 for bare WO3 and 5%, 10%, 15% and 20% Li2MnO3/WO3 nanocomposites, respectively. These results evidenced that the 15% Li2MnO3/WO3 photocatalyst exhibited the best reduction ability compared to other nanocomposites. The CO2 reduction over 15% Li2MnO3/WO3 photocatalyst achieved a maximal CO2 conversion with the substantially boosted CH3OH, i.e., 1550 mmolg-1 after 9 h, which was enhanced 7.8 folds great than of WO3 NPs. Mesoporous Li2MnO3/WO3 nanocomposites, in comparison with bare WO3 NPs, created more active sites for facilitating CO2 and had a specific electric field to more effectively separate charge carriers. The Li2MnO3/WO3 photocatalyst has superior photostability during the continuous reduction of CO2 for 45 h with no remarkable decrease. The possible direct S-scheme mechanism for electron transfer over Li2MnO3/WO3 photocatalyst with the enhanced CO2 reduction ability was discussed. The present work demonstrates an avenue for building highly effective heterostructure photocatalysts in solar-energy-induced potential applications.
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Affiliation(s)
- Soha M Albukhari
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Kingdom of Saudi Arabia.
| | - L A Al-Hajji
- Nanotechnology and Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, Safat, 13109, Kuwait
| | - Adel A Ismail
- Nanotechnology and Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, Safat, 13109, Kuwait.
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5
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Son MK. Key Strategies on Cu 2O Photocathodes toward Practical Photoelectrochemical Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3142. [PMID: 38133039 PMCID: PMC10745550 DOI: 10.3390/nano13243142] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Cuprous oxide (Cu2O) has been intensively in the limelight as a promising photocathode material for photoelectrochemical (PEC) water splitting. The state-of-the-art Cu2O photocathode consists of a back contact layer for transporting the holes, an overlayer for accelerating charge separation, a protection layer for prohibiting the photocorrosion, and a hydrogen evolution reaction (HER) catalyst for reducing the overpotential of HER, as well as a Cu2O layer for absorbing sunlight. In this review, the fundamentals and recent research progress on these components of efficient and durable Cu2O photocathodes are analyzed in detail. Furthermore, key strategies on the development of Cu2O photocathodes for the practical PEC water-splitting system are suggested. It provides the specific guidelines on the future research direction for the practical application of a PEC water-splitting system based on Cu2O photocathodes.
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Affiliation(s)
- Min-Kyu Son
- Nano Convergence Materials Center, Emerging Materials R&D Division, Korea Institute of Ceramic Engineering & Technology (KICET), Jinju 52851, Republic of Korea
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6
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Nomellini C, Polo A, Mesa CA, Pastor E, Marra G, Grigioni I, Dozzi MV, Giménez S, Selli E. Improved Photoelectrochemical Performance of WO 3/BiVO 4 Heterojunction Photoanodes via WO 3 Nanostructuring. ACS APPLIED MATERIALS & INTERFACES 2023; 15. [PMID: 37921705 PMCID: PMC10658457 DOI: 10.1021/acsami.3c10869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/29/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023]
Abstract
WO3/BiVO4 heterojunction photoanodes can be efficiently employed in photoelectrochemical (PEC) cells for the conversion of water into molecular oxygen, the kinetic bottleneck of water splitting. Composite WO3/BiVO4 photoelectrodes possessing a nanoflake-like morphology have been synthesized through a multistep process and their PEC performance was investigated in comparison to that of WO3/BiVO4 photoelectrodes displaying a planar surface morphology and similar absorption properties and thickness. PEC tests, also in the presence of a sacrificial hole scavenger, electrochemical impedance analysis under simulated solar irradiation, and incident photon to current efficiency measurements highlighted that charge transport and charge recombination issues affecting the performance of the planar composite can be successfully overcome by nanostructuring the WO3 underlayer in nanoflake-like WO3/BiVO4 heterojunction electrodes.
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Affiliation(s)
- Chiara Nomellini
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Annalisa Polo
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Camilo A. Mesa
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
| | - Ernest Pastor
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
- IPR−Institut
de Physique de Rennes, CNRS, UMR 6251 Université de Rennes, 35000 Rennes, France
| | - Gianluigi Marra
- Eni
S.p.A Novara Laboratories (NOLAB) Renewable, New Energies and Material
Science Research Center (DE-R&D) Via G. Fauser 4, I-28100 Novara, Italy
| | - Ivan Grigioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Maria Vittoria Dozzi
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
| | - Sixto Giménez
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, S/N, 12006 Castelló, Spain
| | - Elena Selli
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via C. Golgi 19, I-20133 Milano, Italy
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7
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Zhang H, He Y, Bao X, Wang Z, Jiang W, Zheng L, Fan Y, Zheng Z, Cheng H, Wang P, Liu Y, Wang Z, Huang B. Fabrication of Hematite Photoanode Consisting of (110)-Oriented Single Crystals. CHEMSUSCHEM 2023; 16:e202300666. [PMID: 37505451 DOI: 10.1002/cssc.202300666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/06/2023] [Indexed: 07/29/2023]
Abstract
In this work, α-Fe2 O3 photoanode consisted of (110)-oriented α-Fe2 O3 single crystals were synthesized by a facile hydrothermal method. By using particular additive (C4 MimBF4 ) and regulation of hydrothermal reaction time, the Fe-25 consisted of a single-layer of highly crystalline (110)-oriented crystals with fewer grain boundaries, which was vertically grown on the substrate. As a result, the charge separation efficiency and photoelectrochemical (PEC) performance of Fe-25A (Fe-25 after dehydration treatment) have been greatly improved. Fe-25A yields a photocurrent of 1.34 mA cm-2 (1.23 V vs RHE) and an incident photon-to-current conversion efficiency (IPCE) of 31.95 % (380 nm). With the assistance of cobalt-phosphate water oxidation catalyst (Co-Pi), the PEC performance could be further improved by enhancing the holes transfer at electrode/electrolyte interface and inhibiting surface recombination. Fe-25A/Co-Pi yields a photocurrent of 2.67 mA cm-2 (1.23 V vs RHE) and IPCE value of 50.8 % (380 nm), which is 3.67 times and 2.39 times as that of Fe-2A/Co-Pi. Our work provides a simple method to fabricate highly efficient Fe2 O3 photoanodes consist of characteristic (110)-oriented single crystals with high crystallinity and high quality interface contact to enhance charge separation efficiencies.
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Affiliation(s)
- Haipeng Zhang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Yujie He
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xiaolei Bao
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Zhaoqi Wang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Weiyi Jiang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Liren Zheng
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Yuchen Fan
- Department of Hepatology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250100, P. R. China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Hefeng Cheng
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Peng Wang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Yuanyuan Liu
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Zeyan Wang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
| | - Baibiao Huang
- State Key Laboratory of Crystal MaterialsShandong University, Jinan, 250100, P. R. China
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Cifre-Herrando M, Roselló-Márquez G, Navarro-Gázquez PJ, Muñoz-Portero MJ, Blasco-Tamarit E, García-Antón J. Characterization and Comparison of WO 3/WO 3-MoO 3 and TiO 2/TiO 2-ZnO Nanostructures for Photoelectrocatalytic Degradation of the Pesticide Imazalil. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2584. [PMID: 37764613 PMCID: PMC10535956 DOI: 10.3390/nano13182584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023]
Abstract
Tungsten oxide (WO3) and zinc oxide (ZnO) are n-type semiconductors with numerous applications in photocatalysis. The objective of this study was to synthesize and characterize different types of nanostructures (WO3, WO3-Mo, TiO2, and TiO2-ZnO) for a comparison of hybrid and pure nanostructures to use them as a photoanodes for photoelectrocatalytic degradation of emerging contaminants. With the aim of comparing the properties of both samples, field emission scanning electron microscopy (FE-SEM) and confocal laser-Raman spectroscopy were used to study the morphology, composition, and crystallinity, respectively. Electrochemical impedances, Mott-Schottky, and water splitting measurements were performed to compare the photoelectrochemical properties of photoanodes. Finally, the photoelectrocatalytic degradation of the pesticide Imazalil was carried out with the best optimized nanostructure (TiO2-ZnO).
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Affiliation(s)
- Mireia Cifre-Herrando
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
| | - Gemma Roselló-Márquez
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
| | - Pedro José Navarro-Gázquez
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
| | - María José Muñoz-Portero
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
| | - Encarnación Blasco-Tamarit
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
| | - José García-Antón
- Ingeniería Electroquímica y Corrosión (IEC), Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM), Universitat Politècnica de València, C/Camino de Vera s/n, 46022 Valencia, Spain
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9
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Liu B, Wang S, Zhang G, Gong Z, Wu B, Wang T, Gong J. Tandem cells for unbiased photoelectrochemical water splitting. Chem Soc Rev 2023. [PMID: 37325843 DOI: 10.1039/d3cs00145h] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hydrogen is an essential energy carrier which will address the challenges posed by the energy crisis and climate change. Photoelectrochemical water splitting (PEC) is an important method for producing solar-powered hydrogen. The PEC tandem configuration harnesses sunlight as the exclusive energy source to drive both the hydrogen (HER) and oxygen evolution reactions (OER), simultaneously. Therefore, PEC tandem cells have been developed and gained tremendous interest in recent decades. This review describes the current status of the development of tandem cells for unbiased photoelectrochemical water splitting. The basic principles and prerequisites for constructing PEC tandem cells are introduced first. We then review various single photoelectrodes for use in water reduction or oxidation, and highlight the current state-of-the-art discoveries. Second, a close look into recent developments of PEC tandem cells in water splitting is provided. Finally, a perspective on the key challenges and prospects for the development of tandem cells for unbiased PEC water splitting are given.
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Affiliation(s)
- Bin Liu
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
- Department of Chemical and Environmental Engineering, School of Engineering and Applied Sciences, Yale University, New Haven, CT 06520, USA
| | - Shujie Wang
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
| | - Gong Zhang
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Zichen Gong
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Bo Wu
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Tuo Wang
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Jinlong Gong
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
- Department of Chemical and Environmental Engineering, School of Engineering and Applied Sciences, Yale University, New Haven, CT 06520, USA
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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10
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Merazka S, Kars M, Roisnel T, Sidoumou M. Experimental and theoretical study of novel germanium tungstates compounds GexW1-xO3 (x ∼ 1/4, 1/2) and Ge1-xWO4 (x ∼ 0.2). J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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11
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Li D, Lan B, Shen H, Gao C, Tian S, Han F, Chen Z. Controllable Synthesis of N2-Intercalated WO3 Nanorod Photoanode Harvesting a Wide Range of Visible Light for Photoelectrochemical Water Oxidation. Molecules 2023; 28:molecules28072987. [PMID: 37049750 PMCID: PMC10096165 DOI: 10.3390/molecules28072987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
A highly efficient visible-light-driven photoanode, N2-intercalated tungsten trioxide (WO3) nanorod, has been controllably synthesized by using the dual role of hydrazine (N2H4), which functioned simultaneously as a structure directing agent and as a nitrogen source for N2 intercalation. The SEM results indicated that the controllable formation of WO3 nanorod by changing the amount of N2H4. The β values of lattice parameters of the monoclinic phase and the lattice volume changed significantly with the nW: nN2H4 ratio. This is consistent with the addition of N2H4 dependence of the N content, clarifying the intercalation of N2 in the WO3 lattice. The UV-visible diffuse reflectance spectra (DRS) of N2-intercalated exhibited a significant redshift in the absorption edge with new shoulders appearing at 470–600 nm, which became more intense as the nW:nN2H4 ratio increased from 1:1.2 and then decreased up to 1:5 through the maximum at 1:2.5. This addition of N2H4 dependence is consistent with the case of the N contents. This suggests that N2 intercalating into the WO3 lattice is responsible for the considerable red shift in the absorption edge, with a new shoulder appearing at 470−600 nm owing to formation of an intra-bandgap above the VB edges and a dopant energy level below the CB of WO3. The N2 intercalated WO3 photoanode generated a photoanodic current under visible light irradiation below 530 nm due to the photoelectrochemical (PEC) water oxidation, compared with pure WO3 doing so below 470 nm. The high incident photon-to-current conversion efficiency (IPCE) of the WO3-2.5 photoanode is due to efficient electron transport through the WO3 nanorod film.
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Liu N, Li R, Zhu J, Liu Q, Chen R, Yu J, Li Y, Zhang H, Wang J. Z-scheme heterojunction ZnS/WO3 composite: Photocatalytic reduction of uranium and band gap regulation mechanism. J Colloid Interface Sci 2023; 630:727-737. [DOI: 10.1016/j.jcis.2022.10.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/22/2022] [Accepted: 10/29/2022] [Indexed: 11/08/2022]
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13
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Anodic nanoporous WO3 modified with Bi2S3 quantum dots as a photoanode for photoelectrochemical water splitting. J Colloid Interface Sci 2023; 629:958-970. [DOI: 10.1016/j.jcis.2022.09.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/26/2022] [Accepted: 09/04/2022] [Indexed: 11/23/2022]
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14
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Mousavihashemi S, Murcia‐López S, Rodriguez‐Olguin MA, Gardeniers H, Andreu T, Morante JR, Susarrey Arce A, Flox C. Overcoming Voltage Losses in Vanadium Redox Flow Batteries Using WO 3 as a Positive Electrode. ChemCatChem 2022; 14:e202201106. [PMID: 37063813 PMCID: PMC10100004 DOI: 10.1002/cctc.202201106] [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: 09/11/2022] [Revised: 10/19/2022] [Indexed: 11/08/2022]
Abstract
Vanadium redox flow batteries (VRFBs) are appealing large-scale energy storage systems due to their unique properties of independent energy/power design. The VRFBs stack design is crucial for technology deployment in power applications. Besides the design, the stack suffers from high voltage losses caused by the electrodes. The introduction of active sites into the electrode to facilitate the reaction kinetic is crucial in boosting the power rate of the VRFBs. Here, an O-rich layer has been applied onto structured graphite felt (GF) by depositing WO3 to increase the oxygen species content. The oxygen species are the active site during the positive reaction (VO2 +/VO2+) in VRFB. The increased electrocatalytic activity is demonstrated by the monoclinic (m)-WO3/GF electrode that minimizes the voltage losses, yielding excellent performance results in terms of power density output and limiting current density (556 mWcm-2@800 mAcm-2). The results confirm that the m-WO3/GF electrode is a promising electrode for high-power in VRFBs, overcoming the performance-limiting issues in a positive half-reaction.
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Affiliation(s)
- Seyedabolfazl Mousavihashemi
- IREC, Catalonia Institute for Energy ResearchJardins de les Dones de Negre 1Sant Adriá de Besós08930Spain
- Aalto University School of Chemical EngineeringKemistintie 1Espoo02015Finland
| | - Sebastián Murcia‐López
- IREC, Catalonia Institute for Energy ResearchJardins de les Dones de Negre 1Sant Adriá de Besós08930Spain
| | | | - Han Gardeniers
- Mesoscale Chemical Systems MESA+ InstituteUniversity of TwentePO. Box 217EnschedeAE 7500The Netherlands
| | - Teresa Andreu
- IREC, Catalonia Institute for Energy ResearchJardins de les Dones de Negre 1Sant Adriá de Besós08930Spain
- Institut de Nanociència i Nanotecnologia (IN2UB)Universitat de BarcelonaMartí i Franques, 108028BarcelonaSpain
| | - Juan Ramon Morante
- IREC, Catalonia Institute for Energy ResearchJardins de les Dones de Negre 1Sant Adriá de Besós08930Spain
- Facultat de FísicaUniversitat de BarcelonaC. Martí i Franqués, 108028BarcelonaSpain
| | - Arturo Susarrey Arce
- Mesoscale Chemical Systems MESA+ InstituteUniversity of TwentePO. Box 217EnschedeAE 7500The Netherlands
| | - Cristina Flox
- IREC, Catalonia Institute for Energy ResearchJardins de les Dones de Negre 1Sant Adriá de Besós08930Spain
- Institut de Ciencia de Materials de Barcelona CSIC Campus UABBarcelona08193Spain
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Liu J, Luo Z, Mao X, Dong Y, Peng L, Sun-Waterhouse D, Kennedy JV, Waterhouse GIN. Recent Advances in Self-Supported Semiconductor Heterojunction Nanoarrays as Efficient Photoanodes for Photoelectrochemical Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204553. [PMID: 36135974 DOI: 10.1002/smll.202204553] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/23/2022] [Indexed: 06/16/2023]
Abstract
Growth of semiconductor heterojunction nanoarrays directly on conductive substrates represents a promising strategy toward high-performance photoelectrodes for photoelectrochemical (PEC) water splitting. By controlling the growth conditions, heterojunction nanoarrays with different morphologies and semiconductor components can be fabricated, resulting in greatly enhanced light-absorption properties, stabilities, and PEC activities. Herein, recent progress in the development of self-supported heterostructured semiconductor nanoarrays as efficient photoanode catalysts for water oxidation is reviewed. Synthetic methods for the fabrication of heterojunction nanoarrays with specific compositions and structures are first discussed, including templating methods, wet chemical syntheses, electrochemical approaches and chemical vapor deposition (CVD) methods. Then, various heterojunction nanoarrays that have been reported in recent years based on particular core semiconductor scaffolds (e.g., TiO2 , ZnO, WO3 , Fe2 O3 , etc.) are summarized, placing strong emphasis on the synergies generated at the interface between the semiconductor components that can favorably boost PEC water oxidation. Whilst strong progress has been made in recent years to enhance the visible-light responsiveness, photon-to-O2 conversion efficiency and stability of photoanodes based on heterojunction nanoarrays, further advancements in all these areas are needed for PEC water splitting to gain any traction alongside photovoltaic-electrochemical (PV-EC) systems as a viable and cost-effective route toward the hydrogen economy.
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Affiliation(s)
- Jinlong Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
- School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
| | - Ziyu Luo
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Xichen Mao
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Yusong Dong
- School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
| | - Lishan Peng
- School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
| | - Dongxiao Sun-Waterhouse
- School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
| | - John V Kennedy
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
- National Isotope Centre, GNS Science, Lower Hutt, 5010, New Zealand
| | - Geoffrey I N Waterhouse
- School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, 6140, New Zealand
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Shaddad MN, Arunachalam P, Hezam M, BinSaeedan NM, Gimenez S, Bisquert J, Al-Mayouf AM. Facile Fabrication of heterostructured BiPS4-Bi2S3-BiVO4 photoanode for enhanced stability and photoelectrochemical water splitting performance. J Catal 2022. [DOI: 10.1016/j.jcat.2022.12.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Jenewein KJ, Thienhaus S, Kormányos A, Ludwig A, Cherevko S. High-throughput exploration of activity and stability for identifying photoelectrochemical water splitting materials. Chem Sci 2022; 13:13774-13781. [PMID: 36544729 PMCID: PMC9710305 DOI: 10.1039/d2sc05115j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/05/2022] [Indexed: 11/09/2022] Open
Abstract
The experimental high-throughput (HT) exploration for a suitable solar water splitting photoanode has greatly relied on photoactivity as the sole descriptor to identify a promising region within the searched composition space. Although activity is essential, it is not sufficient for describing the overall performance and excludes other pertinent criteria for photoelectrochemical (PEC) water splitting. Photostability in the form of (photo)electrocatalyst dissolution must be tracked to illustrate the intricate relation between activity and stability for multinary photoelectrocatalysts. To access these two important metrics simultaneously, an automated PEC scanning flow cell coupled to an inductively coupled plasma mass spectrometer (PEC-ICP-MS) was used to study an Fe-Ti-W-O thin film materials library. The results reveal an interrelation between composition, photocurrent density, and element-specific dissolution. These structure-activity-stability correlations can be represented using data science tools like principal component analysis (PCA) in addition to common data visualization approaches. This study demonstrates the importance of addressing two of the most important catalyst metrics (activity and stability) in a rapid and parallel fashion during HT experiments to adequately discover high-performing compositions in the multidimensional search space.
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Affiliation(s)
- Ken J Jenewein
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich Cauerstrasse 1 D-91058 Erlangen Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstrasse 3 91058 Erlangen Germany
| | - Sigurd Thienhaus
- Materials Discovery and Interfaces, Institute for Materials, Ruhr University Bochum Universitätsstraße 150 D-44801 Bochum Germany
- Center for Interface-Dominated High Performance Materials, Ruhr University Bochum, Universitätsstraße 150 D-44801 Bochum Germany
| | - Attila Kormányos
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich Cauerstrasse 1 D-91058 Erlangen Germany
- Department of Physical Chemistry and Materials Science, Interdisciplinary Excellence Centre, University of Szeged Aradi Square 1 Szeged H-6720 Hungary
| | - Alfred Ludwig
- Materials Discovery and Interfaces, Institute for Materials, Ruhr University Bochum Universitätsstraße 150 D-44801 Bochum Germany
- Center for Interface-Dominated High Performance Materials, Ruhr University Bochum, Universitätsstraße 150 D-44801 Bochum Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich Cauerstrasse 1 D-91058 Erlangen Germany
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Establishing a water-to-energy platform via dual-functional photocatalytic and photoelectrocatalytic systems: A comparative and perspective review. Adv Colloid Interface Sci 2022; 309:102793. [DOI: 10.1016/j.cis.2022.102793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/25/2022] [Accepted: 09/29/2022] [Indexed: 11/20/2022]
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Puntsagdorj S, Koirala AR, Gombovanjil J, Khanh NN, Sung SD, Lee WI, Yoon KB. Increase in Photocurrent Density of WO 3 Photoanode by Placing a Layer of an Ordered Array of Mesoporous WO 3 Micropillars on Top of a WO 3 Sheet Layer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:31838-31850. [PMID: 35792885 DOI: 10.1021/acsami.2c05107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A facile stamping method was developed to assemble ordered arrays of mesoporous WO3 micropillars with uniform sizes, shapes, and lengths on F-doped tin oxide glass. Using this method, a series of WO3 heterostructural bilayer photoanodes consisting of an array of m-μm long ordered mesoporous WO3 micropillars at the top and the n-μm thick mesoporous WO3 plain sheet layer at the bottom (denoted as m/n) were prepared. Among them 2.5/7.5 displayed a steady state photocurrent density of 3.6 mA cm-2 at 1.23 V (vs RHE) under AM 1.5 (1 Sun), which is much higher than that of the plain 10-μm thick WO3 sheet (2.5 mA cm-2). This phenomenon occurs owing to the following six benefits: increases in charge carrier density, number of photogenerated electron, charge collection rate, thermodynamic feasibility for the vectorial charge transport from the outermost layer of the photoanode to the inner layer, the surface hydrophilicity, and the decrease in charge transfer resistance.
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Affiliation(s)
| | | | | | | | - Sang Do Sung
- Department of Chemistry, Inha University, 100 Inharo, Nam-gu, Incheon 22212, Korea
| | - Wan In Lee
- Department of Chemistry, Inha University, 100 Inharo, Nam-gu, Incheon 22212, Korea
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Shandilya P, Sambyal S, Sharma R, Mandyal P, Fang B. Properties, optimized morphologies, and advanced strategies for photocatalytic applications of WO 3 based photocatalysts. JOURNAL OF HAZARDOUS MATERIALS 2022; 428:128218. [PMID: 35030486 DOI: 10.1016/j.jhazmat.2022.128218] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/18/2021] [Accepted: 01/03/2022] [Indexed: 05/23/2023]
Abstract
The development of WO3 based photocatalysts has gained considerable attention across the world, especially in the realm of environmental remediation and energy production. WO3 has a band gap of 2.5- 2.7 eV that falls under the visible region and is thus a potential candidate to utilize in various photocatalytic processes. As an earth-abundant metal oxide, WO3 discovered in 1976 displayed excellent electronic and morphological properties, good stability, and enhanced photoactivity with diverse crystal phases. Also, it unveils non-toxicity, high stability in drastic conditions, biocompatibility, low cost, excellent hole mobility (10 cm2 V-1s-1), and tunable band gap. This review provides a comprehensive overview of the different properties of WO3 inclusive of crystallographic, electrical, optical, thermoelectrical, and ferroelectric properties. The different morphologies of WO3 based on dimensions were obtained by adopting different fabrication methods including inspecting their effects on the efficiency of WO3. Numerous strategies to construct an ideal photocatalyst such as engineering crystal facets, surface defects, doping, heterojunction formation explaining specifically type-II, Z-scheme, and S-scheme mechanisms with addition to carbonaceous based WO3 nanocomposites are summed up to explore the photocatalytic performance. The typical application of WO3 is deliberated in detail involving the role and efficiency of WO3 in pollutant degradation, CO2 photoreduction, and water splitting. Besides, other applications of WO3 as gas-sensor, bio-sensor, decomposition of VOCs, heavy metals ions adsorption, and antimicrobial property are also included. Moreover, the numerous aspects responsible for the high efficiency of WO3-based nanocomposites with their challenges, opportunities, and future aspects are summarized. Hopefully, this review may inspire researchers to explore new ideas to boost the production of clean energy for the next generation.
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Affiliation(s)
- Pooja Shandilya
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India.
| | - Shabnam Sambyal
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Rohit Sharma
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Parteek Mandyal
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Baizeng Fang
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6P 1Z3, Canada.
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Surnev S, Netzer FP. Tungsten and molybdenum oxide nanostructures: two-dimensional layers and nanoclusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:233001. [PMID: 35045403 DOI: 10.1088/1361-648x/ac4ceb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
W- and Mo-oxides form an interesting class of materials, featuring structural complexities, stoichiometric flexibility, and versatile physical and chemical properties that render them attractive for many applications in diverse fields of nanotechnologies. In nanostructured form, novel properties and functionalities emerge as a result of quantum size and confinement effects. In this topical review, W- and Mo-oxide nanosystems are examined with particular emphasis on two-dimensional (2D) layers and small molecular-type clusters. We focus on the epitaxial growth of 2D layers on metal single crystal surfaces and investigate their novel geometries and structures by a surface science approach. The coupling between the oxide overlayer and the metal substrate surface is a decisive element in the formation of the oxide structures and interfacial strain and charge transfer are shown to determine the lowest energy structures. Atomic structure models as determined by density functional theory (DFT) simulations are reported and discussed for various interface situations, with strong and weak coupling. Free-standing (quasi-)2D oxide layers, so-called oxide nanosheets, are attracting a growing interest recently in the applied research community because of their easy synthesis via wet-chemical routes. Although they consist typically of several atomic layers thick-not always homogeneous-platelet systems, their quasi-2D character induces a number of features that make them attractive for optoelectronic, sensor or biotechnological device applications. A brief account of recently published preparation procedures of W- and Mo-oxide nanosheets and some prototypical examples of proof of concept applications are reported here. (MO3)3(M = W, Mo) clusters can be generated in the gas phase in nearly monodisperse form by a simple vacuum sublimation technique. These clusters, interesting molecular-type structures by their own account, can be deposited on a solid surface in a controlled way and be condensed into 2D W- and Mo-oxide layers; solid-state chemical reactions with pre-deposited surface oxide layers to form 2D ternary oxide compounds (tungstates, molybdates) have also been reported. The clusters have been proposed as model systems for molecular studies of reactive centres in catalytic reactions. Studies of the catalysis of (MO3)3clusters in unsupported and supported forms, using the conversion of alcohols as model reactions, are discussed. Finally, we close with a brief outlook of future perspectives.
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Affiliation(s)
- Svetlozar Surnev
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
| | - Falko P Netzer
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
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Ahn HJ, Kment S, Yoo J, Nguyen NT, Naldoni A, Zboril R, Schmuki P. Magnetite‐free Sn‐doped hematite nanoflake layers for enhanced photoelectrochemical water splitting. ChemElectroChem 2022. [DOI: 10.1002/celc.202200066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hyo-Jin Ahn
- LSTME Busan branch Energy and Catalyst KOREA, REPUBLIC OF
| | - Stepan Kment
- Palacky University in Olomouc 17. Listopadu 12 77146 Olomouc CZECH REPUBLIC
| | - JeongEun Yoo
- University of Erlangen-Nuernberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg Department of Materials Science and Engineering GERMANY
| | - Nhat Truong Nguyen
- University of Erlangen-Nuernberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg Department of Materials Science and Engineering GERMANY
| | - Alberto Naldoni
- Palacky University Olomouc: Univerzita Palackeho v Olomouci RCPTM CZECH REPUBLIC
| | - Radek Zboril
- VŠB-Technical University of Ostrava Faculty of Mechanical Engineering: Vysoka Skola Banska-Technicka Univerzita Ostrava Fakulta Strojni Nanotechnology Centre CZECH REPUBLIC
| | - Patrik Schmuki
- University of Erlangen-Nuernberg: Friedrich-Alexander-Universitat Erlangen-Nurnberg Department of Materials Science and Engineering GERMANY
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Raziq F, Aligayev A, Shen H, Ali S, Shah R, Ali S, Bakhtiar SH, Ali A, Zarshad N, Zada A, Xia X, Zu X, Khan M, Wu X, Kong Q, Liu C, Qiao L. Exceptional Photocatalytic Activities of rGO Modified (B,N) Co-Doped WO 3 , Coupled with CdSe QDs for One Photon Z-Scheme System: A Joint Experimental and DFT Study. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2102530. [PMID: 34859614 PMCID: PMC8805570 DOI: 10.1002/advs.202102530] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/18/2021] [Indexed: 05/06/2023]
Abstract
Artificial Z-scheme, a tandem structure with two-step excitation process, has gained significant attention in energy production and environmental remediation. By effectively connecting and matching the band-gaps of two different photosystems, it is significant to utilize more photons for excellent photoactivity. Herein, a novel one-photon (same energy-two-photon) Z-scheme system is constructed between rGO modified boron-nitrogen co-doped-WO3 , and coupled CdSe quantum dots-(QDs). The coctalyst-0.5%Rhx Cr2 O3 (0.5RCr) modified amount-optimized sample 6%CdSe/1%rGO3%BN-WO3 revealed an unprecedented visible-light driven overall-water-splitting to produce ≈51 µmol h-1 g-1 H2 and 25.5 µmol h-1 g-1 O2 , and it remained unchanged for 5 runs in 30 h. This superior performance is ascribed to the one-photon Z-scheme, which simultaneously stimulates a two photocatalysts system, and enhanced charge separation as revealed by various spectroscopy techniques. The density-functional theory is further utilized to understand the origin of this performance enhancement. This work provides a feasible strategy for constructing an efficient one-photon Z-scheme for practical applications.
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Affiliation(s)
- Fazal Raziq
- Yangtze Delta Region Institute (Huzhou)University of Electronic Science and Technology of ChinaHuzhou313001P. R. China
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Amil Aligayev
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Huahai Shen
- Institute of Nuclear Physics and ChemistryChinese Academy of Engineering PhysicsMianyang621900P. R. China
| | - Sharafat Ali
- Yangtze Delta Region Institute (Huzhou)University of Electronic Science and Technology of ChinaHuzhou313001P. R. China
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Rahim Shah
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Sajjad Ali
- Department of PhysicsSouthern University of Science and TechnologyShenzhen518055P. R. China
| | - Syedul H. Bakhtiar
- The State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan430070P. R. China
| | - Asad Ali
- Department of ChemistryAbdul Wali Khan University MardanKPK23200Pakistan
| | - Naghat Zarshad
- Department of ChemistryAbdul Wali Khan University MardanKPK23200Pakistan
| | - Amir Zada
- Department of ChemistryAbdul Wali Khan University MardanKPK23200Pakistan
| | - Xiang Xia
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Xiaotao Zu
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Muslim Khan
- Department of ChemistryKohat University of Science and TechnologyKohatKPK26000Pakistan
| | - Xiaoqiang Wu
- School of Mechanical EngineeringChengdu UniversityChengdu610106P. R. China
| | - Qingquan Kong
- School of Mechanical EngineeringChengdu UniversityChengdu610106P. R. China
| | - Chunming Liu
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Liang Qiao
- Yangtze Delta Region Institute (Huzhou)University of Electronic Science and Technology of ChinaHuzhou313001P. R. China
- School of PhysicsUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
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Pan A, Qinghui Z, Zhuang Y, Jiaxing W, Jiaying Z, Yajun W, Yuming L, Guiyuan J. Research Progress of Solar Hydrogen Production Technology under Double Carbon Target. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22080362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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25
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Li J, Chen J, Ao Y, Gao X, Che H, Wang P. Prominent dual Z-scheme mechanism on phase junction WO3/CdS for enhanced visible-light-responsive photocatalytic performance on imidacloprid degradation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119863] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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26
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Kim N, Lee I, Choi Y, Ryu J. Molecular design of heterogeneous electrocatalysts using tannic acid-derived metal-phenolic networks. NANOSCALE 2021; 13:20374-20386. [PMID: 34731231 DOI: 10.1039/d1nr05901g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electrochemistry could play a critical role in the transition to a more sustainable society by enabling the carbon-neutral production and use of various chemicals as well as efficient use of renewable energy resources. A prerequisite for the practical application of various electrochemical energy conversion and storage technologies is the development of efficient and robust electrocatalysts. Recently, molecularly designed heterogeneous catalysts have drawn great attention because they combine the advantages of both heterogeneous solid and homogeneous molecular catalysts. In particular, recently emerged metal-phenolic networks (MPNs) show promise as electrocatalysts for various electrochemical reactions owing to their unique features. They can be easily synthesized under mild conditions, making them eco-friendly, form uniform and conformal thin films on various kinds of substrates, accommodate various metal ions in a single-atom manner, and have excellent charge-transfer ability. In this minireview, we summarize the development of various MPN-based electrocatalysts for diverse electrochemical reactions, such as the hydrogen evolution reaction, the oxygen evolution reaction, the CO2 reduction reaction, and the N2 reduction reaction. We believe that this article provides insight into molecularly designable heterogeneous electrocatalysts based on MPNs and guidelines for broadening the applications of MPNs as electrocatalysts.
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Affiliation(s)
- Nayeong Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
- Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Inhui Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
- Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yuri Choi
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
- Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jungki Ryu
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
- Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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Gorobtsov PY, Simonenko TL, Simonenko NP, Simonenko EP, Sevastyanov VG, Kuznetsov NT. Synthesis of Nanoscale WO3 by Chemical Precipitation Using Oxalic Acid. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621120032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Levinas R, Tsyntsaru N, Murauskas T, Cesiulis H. Improved Photocatalytic Water Splitting Activity of Highly Porous WO3 Photoanodes by Electrochemical H+ Intercalation. FRONTIERS IN CHEMICAL ENGINEERING 2021. [DOI: 10.3389/fceng.2021.760700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
WO3 photoanodes are widely used in photoelectrochemical catalysis, but typically the as-synthesized material is annealed before application. It is therefore desirable to explore less energy-intensive treatments. In this study, WO3 films of up to 3.9 μm thickness were obtained by galvanostatic anodization of tungsten foil in a neutral-pH Na2SO4 and NaF electrolyte, also containing a NaH2PO2 additive (to suppress O2 accumulation on the pore walls). Additionally, the WO3 photoanodes were modified by applying a cathodic reduction (H+ intercalation) and anodic activation treatment in-situ. XPS spectra revealed that intercalation modifies WO3 films; the amount of W5+-O and O-vacancy bonds was increased. Furthermore, subsequent activation leads to a decrease of the W5+ signal, but the amount of O-vacancy bonds remains elevated. The as-prepared and reduced (intercalated & activated) films were tested as OER photoanodes in acidic 0.1 M Na2SO4 media, under illumination with a 365 nm wavelength LED. It was observed that thinner films generated larger photocurrents. The peculiarities detected by XPS for reduced films correlate well with their improved photocatalytic activity. Photo-electrochemical impedance and intensity modulated photocurrent spectroscopies were combined with steady-state measurements in order to elucidate the effects of H+ intercalation on photoelectrochemical performance. The reduction results in films with enhanced photoexcited charge carrier generation/separation, improved conductivity, and possibly even suppressed bulk recombination. Thus, the intercalation & activation adopted in this study can be reliably used to improve the overall activity of as-synthesized WO3 photoanodes, and particularly of those that are initially poorly photoactive.
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BiVO 4 Ceramic Photoanode with Enhanced Photoelectrochemical Stability. NANOMATERIALS 2021; 11:nano11092404. [PMID: 34578723 PMCID: PMC8466786 DOI: 10.3390/nano11092404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/24/2021] [Accepted: 09/10/2021] [Indexed: 11/17/2022]
Abstract
Monoclinic bismuth vanadate (BiVO4) is an attractive material with which to fabricate photoanodes due to its suitable band structure and excellent photoelectrochemical (PEC) performance. However, the poor PEC stability originating from its severe photo-corrosion greatly restricts its practical applications. In this paper, pristine and Mo doped BiVO4 ceramics were prepared using the spark plasma sintering (SPS) method, and their photoelectrochemical properties as photoanodes were investigated. The as-prepared 1% Mo doped BiVO4 ceramic (Mo-BVO (C)) photoanode exhibited enhanced PEC stability compared to 1% Mo doped BiVO4 films on fluorine doped Tin Oxide (FTO) coated glass substrates (Mo-BVO). Mo-BVO (C) exhibited a photocurrent density of 0.54 mA/cm2 and remained stable for 10 h at 1.23 V vs. reversible hydrogen electrode (RHE), while the photocurrent density of the Mo-BVO decreased from 0.66 mA/cm2 to 0.11 mA/cm2 at 1.23 V vs. RHE in 4 h. The experimental results indicated that the enhanced PEC stability of the Mo-BVO (C) could be attributed to its higher crystallinity, which could effectively inhibit the dissociation of vanadium in BiVO4 during the PEC process. This work may illustrate a novel ceramic design for the improvement of the stability of BiVO4 photoanodes, and might provide a general strategy for the improvement of the PEC stability of metal oxide photoanodes.
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Fukuzumi S, Lee YM, Nam W. Recent progress in production and usage of hydrogen peroxide. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63767-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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31
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Shoute LCT, Alam KM, Vahidzadeh E, Manuel AP, Zeng S, Kumar P, Kar P, Shankar K. Effect of morphology on the photoelectrochemical performance of nanostructured Cu 2O photocathodes. NANOTECHNOLOGY 2021; 32:374001. [PMID: 32619996 DOI: 10.1088/1361-6528/aba2a3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/03/2020] [Indexed: 06/11/2023]
Abstract
Cu2O is a promising earth-abundant semiconductor photocathode for sunlight-driven water splitting. Characterization results are presented to show how the photocurrent density (Jph), onset potential (Eonset), band edges, carrier density (NA), and interfacial charge transfer resistance (Rct) are affected by the morphology and method used to deposit Cu2O on a copper foil. Mesoscopic and planar morphologies exhibit large differences in the values ofNAandRct. However, these differences are not observed to translate to other photocatalytic properties of Cu2O. Mesoscopic and planar morphologies exhibit similar bandgap (e.g.) and flat band potential (Efb) values of 1.93 ± 0.04 eV and 0.48 ± 0.06 eV respectively.Eonsetof 0.48 ± 0.04 eV obtained for these systems is close to theEfbindicating negligible water reduction overpotential. Electrochemically deposited planar Cu2O provides the highest photocurrent density of 5.0 mA cm-2at 0 V vs reversible hydrogen electrode (RHE) of all the morphologies studied. The photocurrent densities observed in this study are among the highest reported values for bare Cu2O photocathodes.
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Affiliation(s)
- Lian C T Shoute
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Kazi M Alam
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Ehsan Vahidzadeh
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Ajay P Manuel
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Sheng Zeng
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Pawan Kumar
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Piyush Kar
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, 9211 - 116 St, Edmonton, Alberta T6G 1H9, Canada
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The design of high performance photoanode of CQDs/TiO 2/WO 3 based on DFT alignment of lattice parameter and energy band, and charge distribution. J Colloid Interface Sci 2021; 600:828-837. [PMID: 34052533 DOI: 10.1016/j.jcis.2021.05.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/15/2021] [Accepted: 05/15/2021] [Indexed: 01/28/2023]
Abstract
Photoanode is the key issue for photoelectrocatalytic (PEC) water splitting and organics degradation. However, it always faces several restrictions including severe photocorrosion, low charge separation and transfer efficiencies, poor visible light harvesting, and sluggish interfacial reaction kinetics, which often required a variety of modifications with only low improvements achieved. Herein, a high performance CQDs/TiO2/WO3 photoanode was designed on the basis of density function theory (DFT) alignment of lattice parameters and energy band, and charge distribution. The TiO2/WO3 heterojunction can abate photocorrosion through the hetero-epitaxial growth of TiO2 (001) on WO3 (002) for the lattice mismatch <3% eliminating dangling bonds, with high corrosion resistance and photostability of TiO2. As the built-in field constructed by a staggered band alignment structure with the valence band offset (VBO) of 0.51 eV, the photogenerated carriers transfer and separation are promoted dramatically. Through the DFT calculations, the sunlight absorption wavelength can be extended, and the interfacial reaction kinetics can be expedited with the modification of carbon quantum dots (CQDs) on TiO2/WO3, due to the narrower bandgap (Eg) and the accumulation of electrons at TiO2 side. The DFT designed CQDs/TiO2/WO3 photoanode significantly increase photocurrent density from 0.90 to 2.03 mA cm-2 at 1.23 V, charge separation efficiency from 56.3 to 79.2% and charge injection efficiency from 51.2 to 70.4%, and extend light absorption edge from 455 to 463 nm over pristine WO3, with better photostability and lower holes-to-water resistance.
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Nakajima T, Miseki Y, Tateno H, Tsuchiya T, Sayama K. Acid-Resistant BiVO 4 Photoanodes: Insolubility Control by Solvents and Weak W Diffusion in the Lattice. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12079-12090. [PMID: 33660498 DOI: 10.1021/acsami.1c00458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We have revealed for the first time that BiVO4 photoanodes can be used even in strong acid media by mixing organic solvents into the electrolyte and depositing multilayers with a WO3 bottom layer. In general, the BiVO4 photoanodes are photocorrosive, especially in acid solutions. However, this shortcoming has been overcome using a combination of the two aforementioned modifications. We deduced that the contribution of each mixing organic solvent for the anti-photocorrosion of BiVO4 in sulfuric acid solutions can be evaluated on the basis of a new empirical indicator that incorporates molecular density, the Hansen solubility parameter, and molecular polarizability. Acetone and tert-butyl alcohol were especially promising solvents for stabilizing BiVO4 in acid media. We confirmed that the mixed organic solvents stabilized surface-emergent Bi oxide species as a passivation layer, which was generated via multilayering with a WO3 bottom layer. During heat treatment in the fabrication process, W weakly diffused into the BiVO4 layer and a Bi oxide layer was formed on the outermost surface because of the Bi segregation that arose from the charge compensation between W6+ and V5+ in the BiVO4 lattice. The surface Bi oxide layer, which was protected by the mixed organic solvents, steadily served as a passivation layer for anti-photocorrosion of the underlying BiVO4 layer. We have confirmed that the BiVO4/WO3 photoanodes in acetone-mixed aqueous sulfuric acid solution reliably functioned for a photoelectrochemical reaction under simulated sunlight illumination, and photoelectrochemical production of S2O82- ions was confirmed under light irradiation at λ > 480 nm. These results suggest that the BiVO4-based photoanodes have significant potential for use in acid media in conjunction with very straightforward modifications.
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Affiliation(s)
- Tomohiko Nakajima
- Advanced Coating Technology Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yugo Miseki
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroyuki Tateno
- Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba West 5, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Tetsuo Tsuchiya
- Advanced Coating Technology Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiro Sayama
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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Abdel Maksoud MIA, Fahim RA, Shalan AE, Abd Elkodous M, Olojede SO, Osman AI, Farrell C, Al-Muhtaseb AH, Awed AS, Ashour AH, Rooney DW. Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2021; 19:375-439. [DOI: 10.1007/s10311-020-01075-w] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 08/06/2020] [Indexed: 09/02/2023]
Abstract
AbstractSupercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g−1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe2O4, MMoO4 and MCo2O4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo2S4, display a high specific capacitance of 1269 F g−1, which is four times higher than those of transition metals oxides, e.g., Zn–Co ferrite, of 296 F g−1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.
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Wilson AA, Corby S, Francàs L, Durrant JR, Kafizas A. The effect of nanoparticulate PdO co-catalysts on the faradaic and light conversion efficiency of WO 3 photoanodes for water oxidation. Phys Chem Chem Phys 2021; 23:1285-1291. [PMID: 33367408 DOI: 10.1039/d0cp06124g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
WO3 photoanodes offer rare stability in acidic media, but are limited by their selectivity for oxygen evolution over parasitic side reactions, when employed in photoelectrochemical (PEC) water splitting. Herein, this is remedied via the modification of nanostructured WO3 photoanodes with surface decorated PdO as an oxygen evolution co-catalyst (OEC). The photoanodes and co-catalyst particles are grown using an up-scalable aerosol assisted chemical vapour deposition (AA-CVD) route, and their physical properties characterised by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM) and UV-vis absorption spectroscopy. Subsequent PEC and transient photocurrent (TPC) measurements showed that the use of a PdO co-catalyst dramatically increases the faradaic efficiency (FE) of water oxidation from 52% to 92%, whilst simultaneously enhancing the photocurrent generation and charge extraction rate. The Pd oxidation state was found to be critical in achieving these notable improvements to the photoanode performance, which is primarily attributed to the higher selectivity towards oxygen evolution when PdO is used as an OEC and the formation of a favourable junction between WO3 and PdO, that drives band bending and charge separation.
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Affiliation(s)
- Anna A Wilson
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK.
| | - Sacha Corby
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK.
| | - Laia Francàs
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona 08193, Spain.
| | - James R Durrant
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK.
| | - Andreas Kafizas
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK. and The Grantham Institute, Imperial College London, South Kensington, London, SW7 2AZ, UK and London Centre for Nanotechnology, Imperial College London, SW7 2AZ, UK
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Malkhasian AY, Narasimharao K. Synthesis, characterization and photocatalytic properties of WO3/hexagonal platelet graphite nanocomposites. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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37
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Zeng N, Wang YC, Neilson J, Fairclough SM, Zou Y, Thomas AG, Cernik RJ, Haigh SJ, Lewis DJ. Rapid and Low-Temperature Molecular Precursor Approach toward Ternary Layered Metal Chalcogenides and Oxides: Mo 1-x W x S 2 and Mo 1-x W x O 3 Alloys (0 ≤ x ≤ 1). CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2020; 32:7895-7907. [PMID: 32982044 PMCID: PMC7513577 DOI: 10.1021/acs.chemmater.0c02685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Metal sulfide and metal oxide alloys of the form Mo1-x W x S2 and Mo1-x W x O3 (0 ≤ x ≤ 1) are synthesized with varying nominal stoichiometries (x = 0, 0.25, 0.50, 0.75, and 1.0) by thermolysis of the molecular precursors MoL4 and WS(S2)L2 (where L = S2CNEt2) in tandem and in various ratios. Either transition-metal dichalcogenides or transition-metal oxides can be produced from the same pair of precursors by the choice of reaction conditions; metal sulfide alloys of the form Mo1-x W x S2 are produced in an argon atmosphere, while the corresponding metal oxide alloys Mo1-x W x O3 are produced in air, both under atmospheric pressure at 450 °C and for only 1 h. Changes in Raman spectra and in powder X-ray diffraction patterns are observed across the series of alloys, which confirm that alloying is successful in the bulk materials. For the oxide materials, we show that the relatively complicated diffraction patterns are a result of differences in the tilt angle of MO6 octahedra within three closely related unit cell types. Alloying of Mo and W in the products is characterized at the microscale and nanoscale by scanning electron microscopy-energy-dispersive X-ray spectroscopy (EDX) and scanning transmission electron microscopy-EDX spectroscopy, respectively.
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Affiliation(s)
- Niting Zeng
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Yi-Chi Wang
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Joseph Neilson
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Simon M. Fairclough
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Yichao Zou
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Andrew G. Thomas
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Photon
Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Robert J. Cernik
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Sarah J. Haigh
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Booth Street East, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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Teusch T, Klüner T. Photodesorption mechanism of water on WO 3(001) - a combined embedded cluster, computational intelligence and wave packet approach. Phys Chem Chem Phys 2020; 22:19267-19274. [PMID: 32815960 DOI: 10.1039/d0cp02809f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we investigate the mechanism of photodesorption of water from a WO3(001) surface by theoretical calculations, applying an embedded cluster model. Using the CASSCF method, we have calculated both the ground state as well as the energetically preferred charge-transfer state in three degrees of freedom of the water molecule on the surface. The calculated potential energy surfaces were afterwards fitted with a neural network optimized by a genetic algorithm. A final quantum dynamic wave packet study provided insight into the photodesorption mechanism.
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Affiliation(s)
- Thomas Teusch
- Department of Chemistry, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany.
| | - Thorsten Klüner
- Department of Chemistry, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany.
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Strengthened absorption of ultra-thin film bismuth vanadate using a motheye-structured triple-deck photoanode. J Catal 2020. [DOI: 10.1016/j.jcat.2020.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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40
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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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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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Mahala C, Sharma MD, Basu M. Type-II Heterostructure of ZnO and Carbon Dots Demonstrates Enhanced Photoanodic Performance in Photoelectrochemical Water Splitting. Inorg Chem 2020; 59:6988-6999. [PMID: 32369368 DOI: 10.1021/acs.inorgchem.0c00479] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hydrogen evolution through ecofriendly photoelectrochemical (PEC) water splitting is considered to be one of the most cost-effective and desirable methods for meeting ever-growing energy demands. However, the low photoconversion efficiency limits the practical applicability of PEC water splitting. To develop an efficient photoelectrode, here the morphology of ZnO is tuned from 0D to 3D. It is observed that vertically grown 2D nanosheets outperform other morphologies in PEC water splitting by generating nearly 0.414 mA cm-2 at 0 V vs Ag/AgCl. Furthermore, these perpendicularly developed 2D nanosheets of ZnO are sensitized by metal-free carbon (C) dots to improve the photoconversion efficiency of ZnO. The prepared ZnO/C dots work as an effective photoanode, which can produce a 0.831 mA cm-2 photocurrent density upon application of 0 V vs Ag/AgCl under constant illumination, which is 2 times higher than that of bare ZnO. The enhanced PEC performance of ZnO/C dots is confirmed by the photoconversion efficiency (η). The ZnO/C dots exhibit a 2-fold-higher photoconversion efficiency (η) compared to that of ZnO. Additionally, the enhancement in PEC activity of ZnO/C dots is attributed to the higher carrier concentrations in the heterostructure. Bare ZnO has a 1.77 × 1020 cm-3 carrier density, which becomes 3.70 × 1020 cm-3 after sensitization with C dots. Enhanced carrier density successively leads to higher PEC water splitting efficiency. Band alignments of ZnO and C dots indicate the creation of the type-II heterostructure, which facilitates successful charge transportation among C dots and ZnO, producing a charge-carrier separation. Two-dimensional sheets of ZnO and ZnO/C dots exhibit appreciable stability under continuous illumination for 1 and 2 h, respectively.
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Affiliation(s)
- Chavi Mahala
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Mamta Devi Sharma
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Mrinmoyee Basu
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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Koide A, Uemura Y, Kido D, Wakisaka Y, Takakusagi S, Ohtani B, Niwa Y, Nozawa S, Ichiyanagi K, Fukaya R, Adachi SI, Katayama T, Togashi T, Owada S, Yabashi M, Yamamoto Y, Katayama M, Hatada K, Yokoyama T, Asakura K. Photoinduced anisotropic distortion as the electron trapping site of tungsten trioxide by ultrafast W L 1-edge X-ray absorption spectroscopy with full potential multiple scattering calculations. Phys Chem Chem Phys 2020; 22:2615-2621. [PMID: 30989154 DOI: 10.1039/c9cp01332f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Understanding the excited state of photocatalysts is significant to improve their activity for water splitting reaction. X-ray absorption fine structure (XAFS) spectroscopy in X-ray free electron lasers (XFEL) is a powerful method to address dynamic changes in electronic states and structures of photocatalysts in the excited state in ultrafast short time scales. The ultrafast atomic-scale local structural change in photoexcited WO3 was observed by W L1 edge XAFS spectroscopy using an XFEL. An anisotropic local distortion around the W atom could reproduce well the spectral features at a delay time of 100 ps after photoexcitation based on full potential multiple scattering calculations. The distortion involved the movement of W to shrink the shortest W-O bonds and elongate the longest one. The movement of the W atom could be explained by the filling of the dxy and dzx orbitals, which were originally located at the bottom of the conduction band with photoexcited electrons.
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Affiliation(s)
- Akihiro Koide
- Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan. and Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - Yohei Uemura
- Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan. and Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands.
| | - Daiki Kido
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Yuki Wakisaka
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Satoru Takakusagi
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Bunsho Ohtani
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Yasuhiro Niwa
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Shunsuke Nozawa
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Kohei Ichiyanagi
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Ryo Fukaya
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Shin-Ichi Adachi
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | | | | | - Shigeki Owada
- RIKEN SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Makina Yabashi
- RIKEN SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Yusaku Yamamoto
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Misaki Katayama
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Keisuke Hatada
- Department of Physics, University of Toyama, Toyama 930-8555, Japan
| | | | - Kiyotaka Asakura
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
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Markhabayeva AA, Moniruddin M, Dupre R, Abdullin KA, Nuraje N. Designing of WO 3@Co 3O 4 Heterostructures to Enhance Photoelectrochemical Performances. J Phys Chem A 2020; 124:486-491. [PMID: 31838843 DOI: 10.1021/acs.jpca.9b09173] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Heterostructured photocatalysts are superior to single photocatalysts because they offer better charge separation and broaden light harnessing abilities. Although WO3 is considered an oxygen-evolving photocatalyst with decent stability and proper band gap, its lower photocatalytic efficiency is ascribed to high charge recombination. In this research, a WO3@Co3O4 heterostructure reduced the recombination of photocatalytic charges and extended light absorption abilities, resulting in improved photocatalytic activity. The presence of Co3O4 nanoparticles improved light absorption and charge transfer of tungsten oxide films for photoelectrochemical reactions. For photoelectrochemical water oxidation, WO3@Co3O4 nanostructures generated a photocurrent 20 times higher than that of pure WO3. Both electrodeposition and sol gel techniques were utilized to synthesize the WO3@Co3O4 photoelectrode. Scanning electron microscopy and X-ray diffraction were used to characterize the formation of the above photocatalyst. A photocurrent study was done to investigate the charge separation mechanism to explain the enhanced photocatalytic activity.
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Affiliation(s)
- Aiymkul A Markhabayeva
- Department of Chemical Engineering , Texas Tech University , Lubbock , 79409 Texas , United States.,National Nanotechnology Laboratory of Open Type (NNLOT) , Kazakh National University , Almaty 050012 , Kazakhstan
| | - Md Moniruddin
- Department of Chemical Engineering , Texas Tech University , Lubbock , 79409 Texas , United States
| | - Robin Dupre
- Department of Chemical Engineering , Texas Tech University , Lubbock , 79409 Texas , United States
| | - Khabibulla A Abdullin
- National Nanotechnology Laboratory of Open Type (NNLOT) , Kazakh National University , Almaty 050012 , Kazakhstan
| | - Nurxat Nuraje
- Department of Chemical & Materials Engineering , Nazarbayev University , Nursultan 010000 , Kazakhstan
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Photoelectrocatalytic Hydrogen Production Using a TiO2/WO3 Bilayer Photocatalyst in the Presence of Ethanol as a Fuel. Catalysts 2019. [DOI: 10.3390/catal9120976] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photoelectrocatalytic hydrogen production was studied by using a photoelectrochemical cell where the photoanode was made by depositing on FTO electrodes either a nanoparticulate WO3 film alone or a bilayer film made of nanoparticulate WO3 at the bottom covered with a nanoparticulate TiO2 film on the top. Both the electric current and the hydrogen produced by the photoelectrocatalysis cell substantially increased by adding the top titania layer. The presence of this layer did not affect the current-voltage characteristics of the cell (besides the increase of the current density). This was an indication that the flow of electrons in the combined semiconductor photoanode was through the WO3 layer. The increase of the current was mainly attributed to the passivation of the surface recombination sites on WO3 contributing to the limitation of charge recombination mechanisms. In addition, the top titania layer may have contributed to photon absorption by back scattering of light and thus by enhancement of light absorption by WO3. Relatively high charge densities were recorded, owing both to the improvement of the photoanode by the combined photocatalyst and to the presence of ethanol as the sacrificial agent (fuel), which affected the recorded current by “current doubling” phenomena. Hydrogen was produced under electric bias using a simple cathode electrode made of carbon paper carrying carbon black as the electrocatalyst. This electrode gave a Faradaic efficiency of 58% for hydrogen production.
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46
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Cooperative Catalytic Behavior of SnO2 and NiWO4 over BiVO4 Photoanodes for Enhanced Photoelectrochemical Water Splitting Performance. Catalysts 2019. [DOI: 10.3390/catal9110879] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
n-BiVO4 is a favorable photoelectrode candidate for a photoelectrochemical (PEC) water splitting reaction owing to its suitable energy level edge locations for an oxygen evolution reaction. On the other hand, the sluggish water oxidation kinetics of BiVO4 photoanodes when used individually make it necessary to use a hole blocking layer as well as water oxidation catalysts to overcome the high kinetic barrier for the PEC water oxidation reaction. Here, we describe a very simple synthetic strategy to fabricate nanocomposite photoanodes that synergistically address both of these critical limitations. In particular, we examine the effect of a SnO2 buffer layer over BiVO4 films and further modify the photoanode surface with a crystalline nickel tungstate (NiWO4) nanoparticle film to boost PEC water oxidation. When NiWO4 is incorporated over BiVO4/SnO2 films, the PEC performance of the resultant triple-layer NiWO4/BiVO4/SnO2 films for the oxygen evolution reaction (OER) is further improved. The enhanced performance for the PEC OER is credited to the synergetic effect of the individual layers and the introduction of a SnO2 buffer layer over the BiVO4 film. The optimized NiWO4/BiVO4/SnO2 electrode demonstrated both enriched visible light absorption and achieves charge separation and transfer efficiencies of 23% and 30%, respectively. The photoanodic current density for the OER on optimized NiWO4/BiVO4/SnO2 photoanode shows a maximum photocurrent of 0.93 mA/cm2 at 1.23 V vs. RHE in a phosphate buffer solution (pH~7.5) under an AM1.5G solar simulator, which is an incredible five-fold and two-fold enhancement compared to its parent BiVO4 photoanode and BiVO4/SnO2 photoanodes, respectively. Further, the incorporation of the NiWO4 co-catalyst over the BiVO4/SnO2 film increases the interfacial electron transfer rate across the composite/solution interface.
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Cao X, Xu C, Ma J, Dong Y, Dong C, Yue M, Ding Y. Enhanced Photoelectrochemical Performance of WO 3 -Based Composite Photoanode Coupled with Carbon Quantum Dots and NiFe Layered Double Hydroxide. CHEMSUSCHEM 2019; 12:4685-4692. [PMID: 31419062 DOI: 10.1002/cssc.201901803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/09/2019] [Indexed: 05/07/2023]
Abstract
An attractive photoanode material, WO3 , has suffered from its limited visible-light absorption and sluggish surface reaction kinetics, as well as poor stability in neutral electrolytes. Herein, a NiFe/CQD/WO3 composite photoanode was designed and fabricated, with loading of carbon quantum dots (CQDs) and electrodeposition of NiFe layered double hydroxide. The NiFe/CQD/WO3 photoanode obtained a photocurrent density of 1.43 mA cm-2 at 1.23 V vs. reversible hydrogen electrode, which is approximately three times higher than that of bare WO3 . During the test period of 3 h, the stability of WO3 was improved substantially after the loading of cocatalysts. Furthermore, mechanistic insights of the favored band structure and beneficial charge-transfer pathway elucidate the high photoelectrochemical performance of the NiFe/CQD/WO3 composite photoanode.
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Affiliation(s)
- Xiaohu Cao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
| | - Chunjiang Xu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
| | - Jiarui Ma
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
| | - Yinjuan Dong
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
| | - Congzhao Dong
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
| | - Meie Yue
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P.R. China
| | - Yong Ding
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P.R. China
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48
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Yang M, He H, Du J, Peng H, Ke G, Zhou Y. Insight into the Kinetic Influence of Oxygen Vacancies on the WO 3 Photoanodes for Solar Water Oxidation. J Phys Chem Lett 2019; 10:6159-6165. [PMID: 31552737 DOI: 10.1021/acs.jpclett.9b02365] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Improvements to solar water oxidation performance for WO3 photoanodes due to oxygen vacancies have in general been ascribed to thermodynamic effects. Detailed insights into the water oxidation kinetics for WO3 photoanodes with oxygen vacancies are still lacking. Here, our experimental and computational investigations revealed that the water oxidation pathway on WO3 photoanodes with oxygen vacancies is more inclined to follow the four-hole pathway. This finding reasonably explained the common observations of higher faradaic efficiency for oxygen evolution, better stability, and faster kinetics for water oxidation usually achieved on the WO3 photoanodes with oxygen vacancies.
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Affiliation(s)
- Minji Yang
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang 621010 , China
| | - Huichao He
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang 621010 , China
| | - Jinyan Du
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang 621010 , China
| | - Huarong Peng
- College of Chemistry and Chemical Engineering , Chongqing University , Chongqing 400030 , China
| | - Gaili Ke
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang 621010 , China
| | - Yong Zhou
- Ecomaterials and Renewable Energy Research Center, School of Physics , Nanjing University , Nanjing 211102 , China
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Zhang B, Yang F, Liu H, Yan L, Yang W, Xu C, Huang S, Li Q, Bao W, Liu B, Li Y. Assembling Graphene-Encapsulated Pd/TiO2 Nanosphere with Hierarchical Architecture for High-Performance Visible-Light-Assisted Methanol Electro-Oxidation Material. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03619] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bing Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Fan Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Hongchen Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Linan Yan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Wang Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Chong Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Shuo Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Qi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Weijie Bao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Bei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Yongfeng Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
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50
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Wei Z, Hsu C, Almakrami H, Lin G, Hu J, Jin X, Agar E, Liu F. Ultra-high-aspect-ratio vertically aligned 2D MoS2-1D TiO2 nanobelt heterostructured forests for enhanced photoelectrochemical performance. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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