Cu2O作为空穴提取层修饰BiVO4光阳极以增强电荷分离和转移(英文) |
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作者姓名: | 田泽 王振霞 马自在 李晋平 王孝广 |
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作者单位: | 1. Laboratory of Advanced Materials and Energy Electrochemistry,Institute of New Carbon Materials,College of Material Science and Engineering,Taiyuan University of Technology;2. College of Chemistry,Taiyuan University of Technology;3. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology |
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基金项目: | supported by the National Natural Science Foundation of China (22008165 and 21878201);;the Natural Science Foundation of Shanxi Province (202303021211035); |
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摘 要: | 光生电荷的分离和转移被认为是影响BiVO4基光阳极光电性能的核心因素之一.本文设计了在BiVO4光阳极与析氧助催化剂之间插入空穴提取层的方法.Cu2O作为空穴提取层引入到助催化剂层(FeOOH/NiOOH)和BiVO4之间,可以有效优化空穴的迁移路径,延长光生空穴的寿命,从而提高电极的光电化学性能.与BiVO4相比,调整后的BiVO4/Cu2O/FeOOH/NiOOH光阳极的电荷分离效率从70.6%提高到了92.0%.此外,该光阳极在1.23 VRHE(AM 1.5G照明下)下,还显示出了3.85 mA cm-2的高光电流密度,是BiVO4的2.77倍.我们的研究结果表明,电沉积Cu2O空穴提取层是一种简单且可扩展的方法,能够有效提高BiVO4的光电活性,可用于太阳能驱动水分解领域.
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