51
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Fan X, Wang T, Xue H, Gao B, Zhang S, Gong H, Guo H, Song L, Xia W, He J. Synthesis of Tungsten Trioxide/Hematite Core-Shell Nanoarrays for Efficient Photoelectrochemical Water Splitting. ChemElectroChem 2018. [DOI: 10.1002/celc.201801181] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaoli Fan
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Tao Wang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Hairong Xue
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou, Zhejiang 310014 P. R. China
| | - Bin Gao
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Songtao Zhang
- Testing Center; Yangzhou University; 225009 Yangzhou, Jiangsu P. R. China
| | - Hao Gong
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Hu Guo
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Li Song
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Wei Xia
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
| | - Jianping He
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies; Nanjing University of Aeronautics and Astronautics; 210016 Nanjing P. R. China
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52
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Ooka H, Takashima T, Yamaguchi A, Hayashi T, Nakamura R. Element strategy of oxygen evolution electrocatalysis based on in situ spectroelectrochemistry. Chem Commun (Camb) 2018; 53:7149-7161. [PMID: 28466887 DOI: 10.1039/c7cc02204b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Oxygen evolution electrocatalysis has received extensive attention due to its significance in biology, chemistry, and technology. However, it is still unclear how the abundant 3d-elements can be used to drive the four-electron oxidation of water as efficiently as in Nature. In this Feature Article, we will propose a design strategy concerning the optimization of the charge accumulation process based on our ongoing spectroelectrochemical study on Mn, Fe, and Ir oxygen evolution catalysts. Spectroscopic identification of the reaction intermediates showed that the activity of MnO2 and Fe2O3 was dictated by the generation of Mn3+ and Fe4+, whereas in the case of IrOx, the activity did not correlate with the valence change of Ir. The efficiency of charge accumulation through valence change is closely linked with the spin configuration of the metal center, because charge disproportionation, which was found to inhibit charge accumulation in the high-spin 3d metals, requires an electron in the eg orbital. In addition to directly increasing the overpotential through the generation of an unstable intermediate, charge disproportionation inhibits charge accumulation by dissipating the total oxidative energy of the system. A favorable charge accumulation process may also be beneficial for electrode kinetics due to the enhanced coupling between reaction rates and electrochemical driving force. The model proposed in this study may help explain why low-spin 4d/5d rare metals are often more active than the abundant high-spin 3d materials for multi-electron transfer reactions in general, and provides new insight into how active 3d-metal catalysts can be synthesized by optimizing the energetics of both bond formation and charge accumulation.
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Affiliation(s)
- Hideshi Ooka
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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53
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Qiu P, Yang H, Yang L, Wang Q, Ge L. Solar water splitting with nanostructured hematite: The role of annealing-temperature. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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54
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Liu A, Zhang Y, Ma W, Song W, Chen C, Zhao J. Facial boron incorporation in hematite photoanode for enhanced photoelectrochemical water oxidation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.08.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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55
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Zhang Y, Zhang H, Liu A, Chen C, Song W, Zhao J. Rate-Limiting O–O Bond Formation Pathways for Water Oxidation on Hematite Photoanode. J Am Chem Soc 2018; 140:3264-3269. [DOI: 10.1021/jacs.7b10979] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yuchao Zhang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hongna Zhang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Anan Liu
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wenjing Song
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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56
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Xu Z, Fan Z, Shi Z, Li M, Feng J, Pei L, Zhou C, Zhou J, Yang L, Li W, Xu G, Yan S, Zou Z. Interface Manipulation to Improve Plasmon-Coupled Photoelectrochemical Water Splitting on α-Fe 2 O 3 Photoanodes. CHEMSUSCHEM 2018; 11:237-244. [PMID: 28940828 DOI: 10.1002/cssc.201701679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/15/2017] [Indexed: 05/07/2023]
Abstract
The plasmon resonance effect of metal nanoparticles (NPs) offers a promising route to improve the solar energy conversion efficiency of semiconductors. In this study, it is revealed that hot electrons generated by the plasmon resonance effect of Au NPs tend to inject into the surface states instead of the conduction band of Fe2 O3 photoanodes, and then severe surface recombination occurs. Such an electron-transfer process seems to be independent of external applied potentials, but is sensitive to metal-semiconductor interface properties. Passivating the surface states of Fe2 O3 with a noncatalytic Al2 O3 layer can construct an effective resonant energy-transfer interface between Ti-doped Fe2 O3 (Ti-Fe2 O3 ) and Au NPs. In such a Ti-Fe2 O3 /Al2 O3 /Au electrode configuration, the enhanced photoelectrochemical (PEC) water-splitting performance can be attributed to the following two factors: 1) in the non-light-responsive wavelength range of Au NPs, both the relaxing Fermi pinning effect of the Al2 O3 passivation layer and the higher work function of Au enlarge band bending; thus promoting the charge separation; and 2) in the light-responsive wavelength range of Au NPs, the effective resonant energy transfer contributes to light harvesting and conversion. The interface manipulation proposed herein may provide a new route to design efficient plasmonic PEC devices for energy conversion.
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Affiliation(s)
- Zhe Xu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Zhongwen Fan
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Zhan Shi
- Jiangsu Province Key Laboratory for Nanotechnology, Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Mengyu Li
- No.1 Middle School of Tancheng, Linyi, Shandong 276100, PR China
| | - Jianyong Feng
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Lang Pei
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Chenguang Zhou
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Junkang Zhou
- Jiangsu Province Key Laboratory for Nanotechnology, Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Lingxia Yang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Wenchao Li
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Guangzhou Xu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Shicheng Yan
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
| | - Zhigang Zou
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, PR China
- Jiangsu Province Key Laboratory for Nanotechnology, Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing, Jiangsu, 210093, PR China
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57
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Yang W, Wu W, Chen W, Zhao J, Hu X. Structural modulation of CdS/ZnO nanoheterojunction arrays for full solar water splitting and their related degradation mechanisms. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01549j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Higher PEC performance for full water splitting was realized for a CoPi–CdS/ZnO NHA via structural modulation, and degradation in the performance was elucidated.
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Affiliation(s)
- Weijie Yang
- School of Materials Science and Engineering
- University of Jinan
- Jinan
- China
| | - Weibing Wu
- School of Materials Science and Engineering
- University of Jinan
- Jinan
- China
| | - Wenwen Chen
- School of Materials Science and Engineering
- University of Jinan
- Jinan
- China
| | - Jizuo Zhao
- School of Materials Science and Engineering
- University of Jinan
- Jinan
- China
| | - Xun Hu
- School of Materials Science and Engineering
- University of Jinan
- Jinan
- China
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58
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Qiu P, Yang H, Song Y, Yang L, Lv L, Zhao X, Ge L, Chen C. Potent and environmental-friendly l-cysteine @ Fe2O3 nanostructure for photoelectrochemical water splitting. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.10.168] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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59
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Zhang Y, He S, Guo W, Hu Y, Huang J, Mulcahy JR, Wei WD. Surface-Plasmon-Driven Hot Electron Photochemistry. Chem Rev 2017; 118:2927-2954. [DOI: 10.1021/acs.chemrev.7b00430] [Citation(s) in RCA: 730] [Impact Index Per Article: 104.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yuchao Zhang
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Shuai He
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Wenxiao Guo
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Yue Hu
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Jiawei Huang
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Justin R. Mulcahy
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Wei David Wei
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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60
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Husek J, Cirri A, Biswas S, Baker LR. Surface electron dynamics in hematite (α-Fe 2O 3): correlation between ultrafast surface electron trapping and small polaron formation. Chem Sci 2017; 8:8170-8178. [PMID: 29619171 PMCID: PMC5861984 DOI: 10.1039/c7sc02826a] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 10/09/2017] [Indexed: 11/21/2022] Open
Abstract
Spectroscopically following charge carrier dynamics in catalytic materials has proven to be a difficult task due to the ultrafast timescales involved in charge trapping and the lack of spectroscopic tools available to selectively probe surface electronic structure. Transient extreme ultraviolet reflection-absorption (XUV-RA) spectroscopy is able to follow surface electron dynamics due to its element, oxidation-state, and surface specificity, as well as the ultrafast time-resolution which can be achieved with XUV pulses produced by high harmonic generation. Here, we use ultrafast XUV-RA spectroscopy to show that charge localization and small polaron formation in Fe2O3 occur within ∼660 fs. The photoexcitation of hematite at 400 nm initially leads to an electronically-delocalized ligand-to-metal charge transfer (LMCT) state, which subsequently evolves into a surface localized LMCT state. Comparison of the charge carrier dynamics for single and polycrystalline samples shows that the observed dynamics are negligibly influenced by grain boundaries and surface defects. Rather, correlation between experimental results and spectral simulations reveals that the lattice expansion during small polaron formation occurs on the identical time scale as surface trapping and represents the probable driving force for sub-ps electron localization to the hematite surface.
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Affiliation(s)
- Jakub Husek
- The Ohio State University , Columbus , OH 43210 , USA .
| | - Anthony Cirri
- The Ohio State University , Columbus , OH 43210 , USA .
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61
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Xiao J, Huang H, Huang Q, Zhao L, Li X, Hou X, Chen H, Li Y. Suppressing the electron–hole recombination rate in hematite photoanode with a rapid cooling treatment. J Catal 2017. [DOI: 10.1016/j.jcat.2017.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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62
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Shu J, Liu R, Liu Z, Qiu J, Chen H, Tao C. Simultaneous removal of ammonia nitrogen and manganese from wastewater using nitrite by electrochemical method. ENVIRONMENTAL TECHNOLOGY 2017; 38:370-376. [PMID: 27249226 DOI: 10.1080/09593330.2016.1194482] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 05/21/2016] [Indexed: 06/05/2023]
Abstract
In this work, nitrite was developed to simultaneously remove manganese and ammonia nitrogen from wastewater by the electrochemical method. The characteristics of electrolytic reaction were observed via cyclic voltammograms. Moreover, the mole ratio of nitrite and ammonia nitrogen, voltage, and initial pH value, which affected the removal efficiency of ammonia nitrogen and manganese, were investigated. The results showed that the concentration of ammonia nitrogen in wastewater could be reduced from 120.2 to 6.0 mg L-1, and manganese could be simultaneously removed from 302.4 to 1.5 mg L-1 at initial pH of 8.0, the mole ratios of nitrite and ammonia nitrogen of 1.5:1, and voltage of 20 V direct current electrolysis for 4.0 h. XRD analysis showed that manganese dioxide was deposited on the anode, and manganese was mainly removed in the form of manganese hydroxide precipitation in the cathode chamber.
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Affiliation(s)
- Jiancheng Shu
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
| | - Renlong Liu
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
| | - Zuohua Liu
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
| | - Jiang Qiu
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
| | - Hongliang Chen
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
| | - Changyuan Tao
- a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China
- b Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization , Chongqing , People's Republic of China
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63
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Chen B, Fan W, Mao B, Shen H, Shi W. Enhanced photoelectrochemical water oxidation performance of a hematite photoanode by decorating with Au–Pt core–shell nanoparticles. Dalton Trans 2017; 46:16050-16057. [DOI: 10.1039/c7dt03838k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The charge transfer process of the AuPt/α-Fe2O3 composite photoanode for photoelectrochemical water oxidation.
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Affiliation(s)
- Biyi Chen
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Weiqiang Fan
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Baodong Mao
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Hao Shen
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Weidong Shi
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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64
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Ding C, Shi J, Wang Z, Li C. Photoelectrocatalytic Water Splitting: Significance of Cocatalysts, Electrolyte, and Interfaces. ACS Catal 2016. [DOI: 10.1021/acscatal.6b03107] [Citation(s) in RCA: 387] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Chunmei Ding
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Jingying Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Zhiliang Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Dalian National Laboratory for Clean Energy, Dalian 116023, China
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65
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Doping-Promoted Solar Water Oxidation on Hematite Photoanodes. Molecules 2016; 21:molecules21070868. [PMID: 27376262 PMCID: PMC6274439 DOI: 10.3390/molecules21070868] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/15/2016] [Accepted: 06/25/2016] [Indexed: 12/11/2022] Open
Abstract
As one of the most promising materials for solar water oxidation, hematite has attracted intense research interest for four decades. Despite their desirable optical band gap, stability and other attractive features, there are great challenges for the implementation of hematite-based photoelectrochemical cells. In particular, the extremely low electron mobility leads to severe energy loss by electron hole recombination. Elemental doping, i.e., replacing lattice iron with foreign atoms, has been shown to be a practical solution. Here we review the significant progresses in metal and non-metal element doping-promoted hematite solar water oxidation, focusing on the role of dopants in adjusting carrier density, charge collection efficiency and surface water oxidation kinetics. The advantages and salient features of the different doping categories are compared and discussed.
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66
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Takashima T, Ishikawa K, Irie H. Efficient oxygen evolution on hematite at neutral pH enabled by proton-coupled electron transfer. Chem Commun (Camb) 2016; 52:14015-14018. [DOI: 10.1039/c6cc08379j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygen evolution activity of hematite at neutral pH was enhanced by inducing the concerted proton-coupled electron transfer process.
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Affiliation(s)
| | - Koki Ishikawa
- Special Doctoral Program for Green Energy Conversion Science and Technology
- Interdisciplinary Graduate School of Medicine and Engineering
- University of Yamanashi
- Kofu
- Japan
| | - Hiroshi Irie
- Clean Energy Research Center
- University of Yamanashi
- Kofu
- Japan
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