Ni-Doped BiVO4 with V4+ Species and Oxygen Vacancies for Efficient Photoelectrochemical Water Splitting

论文摘要

Bismuth vanadate is a promising photoanode material for photoelectrochemical（PEC）water splitting,but its activity and stability need to be further improved.In this work,we synthesized Ni-doped BiVO 4abundant with V 4+species and oxygen defects through an in situ electrodeposition method.The effective doping can decrease the particle size of BiVO 4and lead to the formation of V 4+species/oxygen defects.Accordingly,the doped and defective BiVO 4showed high optical absorption and rapid charge transfer,and further showed much higher PEC activity than pure BiVO 4.Specifically,5-Ni-BiVO4exhibits the highest activity in PEC water splitting,with a photocurrent of 2.39 mA/cm 2at 1.23 V versus RHE（the reversible hydrogen electrode）,which is 2.5 times higher than pure BiVO 4（0.94 m A/cm 2）,and much higher incident photon-to-current efficiency（IPCE）value of 45%(while only 25%for BiVO 4at ca.400 nm).This work provides an in situ method for the development of a high-performance photoanode.

论文目录

文章来源

类型: 期刊论文

作者: Dechao Kong,Jie Qi,Danyang Liu,Xiangwen Zhang,Lun Pan,Jijun Zou

来源: Transactions of Tianjin University 2019年04期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 化学,无机化工

单位: Key Laboratory for Green Chemical Technology of the Ministry of Education,Tianjin University,School of Chemical Engineering and Technology,Tianjin University,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin),Tianjin University,People’s Public,Security University of China

基金: support from the National Natural Science Foundation of China (Nos. 51661145026,21506156,21676193),the Tianjin Municipal Natural Science Foundation (No. 16JCQNJC05200)

分类号: TQ116.2;O646.54

页码: 340-347

总页数: 8

文件大小: 2717K

下载量: 24

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