光电流
钒酸铋
面(心理学)
材料科学
纳米孔
分解水
电极
Crystal(编程语言)
析氧
能量转换效率
化学工程
纳米技术
热液循环
光催化
光电子学
化学
催化作用
物理化学
电化学
计算机科学
人格
工程类
五大性格特征
程序设计语言
心理学
社会心理学
生物化学
作者
Xinxin Lü,Jingran Xiao,Lingling Peng,Liwen Zhang,Guowu Zhan
标识
DOI:10.1016/j.jcis.2022.07.189
摘要
Morphology and geometrical dimensions play crucial roles in the photoelectrochemical (PEC) performance of bismuth vanadate (BiVO4) for water splitting. Decahedral BiVO4 was synthesized through a facile hydrothermal process, which exhibited superior charge injection efficiency to the nanoporous counterpart prepared by the traditional method. More importantly, the crystal size and facet proportion of BiVO4 decahedrons were facilely controlled. The charge separation efficiency can be significantly improved with a reduction in the crystal size and an increase in (040) facet exposure. A new method was developed for rate law analysis: illumination intensity-modulated oxygen evolution reaction rate versus open circuit potential difference, which suggested that the surface reaction kinetics was not affected by facet regulation. Furthermore, after decorating the FeOOH and NiOOH as dual oxygen evolution cocatalysts, an enhanced photocurrent density of 3.2 mA cm-2 at 1.23 V versus reversible hydrogen electrode and interfacial charge injection efficiency of 97.0% can be reached. Our work inspires the development of facet-regulated BiVO4 photoanodes with high charge injection efficiency in the PEC field and provides a feasible route to enhance its charge separation efficiency.
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