磷化物
镍
光电流
分解水
材料科学
动力学
光电子学
扩散
化学工程
化学
催化作用
冶金
光催化
物理
量子力学
生物化学
工程类
热力学
作者
Yongsheng Li,Zhen Li,Chengwen Xu,Shuangwei Yu,Zijun Sun
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:13 (12): 8374-8382
被引量:3
摘要
The photoelectrochemical (PEC) water splitting performance of BiVO4 (BVO), a promising photoanode material, is constrained by its extremely short hole diffusion length and slow water oxidation kinetics. Modification of oxygen evolution cocatalysts (OECs) by appropriate methods is a practical solution to enhance the PEC water splitting performance of BVO. In this work, two different nickel phosphides Ni2P and Ni12P5 were prepared by a facile and mild one-step solvothermal method, and used as OECs to modify a BVO photoanode for enhancing the PEC water splitting performance. The BVO/Ni2P and BVO/Ni12P5 photoanodes showed impressive photocurrent densities of 3.3 mA cm-2 and 3.1 mA cm-2, respectively. In addition, the PEC water splitting stability of the BVO/Ni2P photoanode was greatly enhanced compared to that of the bare BVO photoanode. Further characterization and photoelectrochemical analysis revealed that the significant improvement of the BVO photoanode performance was attributed to the effective inhibition of surface charge recombination, facilitation of interfacial charge transfer, and acceleration of water oxidation kinetics after Ni2P and Ni12P5 modification.
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