化P-InP光阴极的正面表面潜力通过双工作电极测量检测
Weilai Yu1,2, Nathan S Lewis1,3
1Division of Chemistry and Chemical Engineering, 127-72 Noyes Laboratory, California Institute of Technology, Pasadena, California 91125, United States.
概括
使用双工作电极方法测量了p-InP/Pt光阴极的前面电位. 这揭示了催化动力学,而不是应用潜力,在进化过程中控制光阴极性能.
科学领域:
- 光催化作用的光催化
- 半导体接口 半导体接口
- 的演化反应反应.
背景情况:
- 对于的进化,p-InP/Pt光阴极是有希望的.
- 了解它们的前表面潜力 (Efr) 对于稳定性至关重要.
- 现有的稳定性机制需要实验验证.
研究的目的:
- 在工作条件下探测p-InP/Pt光阴极的前面电位 (Efr).
- 为了验证p-InP光阴极的拟议稳定机制.
- 为界面催化剂活性建立一个快速的,操作的指标.
主要方法:
- 使用双工作电极 (DWE) 方法.
- 在演化反应条件下操作的光阴极.
- 测量了前面表面电位 (Efr) 和后面接触电位 (Eb).
主要成果:
- DWE数据与p-InP光阴极的拟议稳定机制一致.
- 对Pt-修饰的p-InP的Efr在可逆电极 (RHE) 电位附近稳定.
- 这种潜力表明金属In0形成的动力抑制.
- Efr是由表面催化动力学控制的,而不是应用的反接触潜力 (Eb).
结论:
- DWE方法提供了对界面催化剂活性的快速操作评估.
- 表面催化动力学是p-InP/Pt连接处的Efr的主要决定因素.
- 这些发现支持了p-InP光阴极所提出的稳定性机制.
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