Insight into the Kinetic Influence of Oxygen Vacancies on the WO3 Photoanodes for Solar Water Oxidation
Insight into the Kinetic Influence of Oxygen Vacancies on the WO3 Photoanodes for Solar Water Oxidation
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深入了解氧空位对太阳能水氧化 WO3 光电阳极的动力学影响
DOI：
10.1021/acs.jpclett.9b02365
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发表时间：
2019
影响因子：
5.7
通讯作者：
Yong Zhou
中科院分区：
文献类型：
--
作者：
Minji Yang;Huichao He;Jinyan Du;Huarong Peng;Gaili Ke;Yong Zhou
由于氧空位的存在，wo3光阳极太阳能水氧化性能的改善通常被归因于热力学效应。关于氧空位wo3光阳极的水氧化动力学的详细见解仍然缺乏。本文的实验和计算研究表明，具有氧空位的wo3光阳极上的水氧化途径更倾向于遵循四孔途径。这一发现合理地解释了通常在具有氧空位的wo3光阳极上实现的更高的析氧法拉第效率、更好的稳定性和更快的水氧化动力学。
Improvements to solar water oxidation performance for WO3photoanodes due to oxygen vacancies have in general been ascribed to thermodynamic effects. Detailed insights into the water oxidation kinetics for WO3photoanodes with oxygen vacancies are still lacking. Here, our experimental and computational investigations revealed that the water oxidation pathway on WO3photoanodes 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 WO3photoanodes with oxygen vacancies.