1D ZnFe2O4 nanorods coupled with plasmonic Ag,Ag2S nanoparticles and Co-Pi cocatalysts for efficient photoelectrochemical water splitting |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin Chengjian University, 300384, Tianjin, China;2. Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, 300384, Tianjin, China;3. Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China;4. Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi''an University of Technology, Xi''an, 710048, China;1. State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, University of Science and Technology Beijing, Beijing 100083, China;1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology of Beijing (USTB), Beijing 100083, PR China;2. Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, South Korea;1. School of mining engineering, Engineering Research Center of Green Mining of Metal Mineral Resources, University of Science and Technology Liaoning, Anshan 114051, Liaoning Province, PR China;2. School of civil engineering, University of Science and Technology Liaoning, Anshan 114051, Liaoning Province, PR China;3. Department of chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Tsinghua university, Beijing 10084, PR China;1. School of Materials Science & Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, PR China;2. School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, PR China;3. Qualtec Co., Ltd, Osaka, 590-0906, Japan;1. School of Materials Science and Engineering, Tianjin Chengjian University, 300384 Tianjin, China;2. Tianjin Key Laboratory of Building Green Functional Materials, 300384 Tianjin, China;3. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, 102617 Beijing, China;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China;2. School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, PR China |
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| Abstract: | Improving the absorption of visible light, accelerating the separation of carries and reducing the recombination of electron-hole pairs are critical to enhance photoelectrochemical (PEC) performance of ZnFe2O4. Herein, the ZnFe2O4/Ag/Ag2S films are firstly prepared with a photocurrent density of 0.91 mA/cm2 at 1.23 V vs. RHE, which is 9.10 times higher than that of pristine ZnFe2O4 (0.10 mA/cm2 at 1.23 V vs. RHE). On the basis, Co-Pi cocatalyst is deposited on ZnFe2O4/Ag/Ag2S to further optimize PEC performance of ZnFe2O4, the photocurrent density of ZnFe2O4/Ag/Ag2S/Co-Pi is 1.18 mA/cm2 at 1.23 V vs. RHE. The improved PEC performance of ZnFe2O4/Ag/Ag2S/Co-Pi films could be attributed to: (i) fast transmission of electron-hole pairs owing to 1D ZnFe2O4 NRs; (ii) surface plasmon resonance (SPR) effect of Ag nanoparticles; (ⅲ) visible light absorption is improved by sensitization of Ag2S nanoparticles; (ⅳ) Co-Pi cocatalyst decreases the recombination of electron-hole pairs by capturing holes. This work provides new insights for metal plasmas, sensitizers and cocatalysts synergistically modify photoanodes for efficient PEC water splitting. |
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| Keywords: | Surface plasmon resonance Sensitizers Cocatalysts Photoelectrochemical water splitting |
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