阐明次磷酸盐处理在提高用于光电化学水氧化的BiVO光阳极性能中的作用。
Elucidating the Role of Hypophosphite Treatment in Enhancing the Performance of BiVO Photoanode for Photoelectrochemical Water Oxidation.
作者信息
Wang Qingjie, Wu Linxiao, Zhang Zhuang, Cheng Jinshui, Chen Rong, Liu Yang, Luo Jingshan
机构信息
Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
出版信息
ACS Appl Mater Interfaces. 2022 Jun 15;14(23):26642-26652. doi: 10.1021/acsami.2c02790. Epub 2022 May 31.
Slow water oxidation kinetics and poor charge transport restrict the development of efficient BiVO photoanodes for photoelectrochemical (PEC) water splitting. Oxygen vacancy as an effective strategy can significantly enhance charge transport and improve conductivity in semiconductor photoanodes. Herein, we obtained BiVO photoanodes with appropriate oxygen vacancy by treating them with hypophosphite, which significantly improved the PEC performance. The synthesized photoanode exhibits a remarkable photocurrent density of 3.37 mA/cm at 1.23 V vs reversible hydrogen electrode with excellent stability. Interestingly, the performance improvement mainly originates from the oxygen vacancy rather than P doping. Our study provides insights in understanding the role of oxygen vacancy in PEC water splitting and strategies for designing more efficient photoelectrodes.
缓慢的水氧化动力学和较差的电荷传输限制了用于光电化学（PEC）水分解的高效BiVO光阳极的发展。氧空位作为一种有效策略可以显著增强电荷传输并提高半导体光阳极的导电性。在此，我们通过用次磷酸盐处理获得了具有适当氧空位的BiVO光阳极，这显著提高了PEC性能。合成的光阳极在相对于可逆氢电极1.23 V时表现出3.37 mA/cm的显著光电流密度，且具有出色的稳定性。有趣的是，性能提升主要源于氧空位而非P掺杂。我们的研究为理解氧空位在PEC水分解中的作用以及设计更高效光电极的策略提供了见解。
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