Ni_(3)B modified BiVO_(4) photoanodes for enhanced photoelectrochemical water splitting:The key role of Ni_(3)B on reducing the water oxidation barrier  

作　　者：Kehui Xue Haifeng Zhu Xingyu Zhao Liana Alvares Rodrigues D.Amaranatha Reddy Yaping Zhang Lianqing Yu 

机构地区：[1]School of Materials Science and Engineering,China University of Petroleum(East China),QingDao 266580,China [2]College of Science,China University of Petroleum(East China),QingDao 266580,China [3]Engineering School of Lorena,University of São Paulo,CEP 12602-810,São Paulo,Brazil [4]Indian Institute of Information Technology Design and Manufacturing,Kurnool 518007,India

出　　处：《Nano Research》2023年第10期12043-12049,共7页纳米研究（英文版）

基　　金：the Natural Science Foundation of Shandong Province(No.ZR2019EMQ001);Technology Project of Qingdao(No.22-3-7-cspz-9-nsh);the National Natural Science Foundation of China(No.21476262)is gratefully acknowledged.

摘　　要：Bismuth vanadate(BiVO_(4),BVO)as a promising photoelectrode has been received great attention for photoelectrochemical(PEC)water splitting.However,the slow oxidation kinetics on the surface of BiVO_(4)limited the PEC water splitting efficiency.Herein,nickel boride(Ni_(3)B,NB)nanoparticles,generally used in electrocatalytic field material,were modified on the surface of BiVO_(4)photoelectrode as an efficient cocatalyst to accelerate the oxygen evolution reaction.The as-prepared BVO-NB-5P photoelectrode exhibits a remarkable photocurrent density of 1.47 mA·cm^(−2)at 1.23 V versus the reversible hydrogen electrode(RHE)under air mass(AM)1.5 G illumination,which is about 2.8 times higher than the bare BiVO_(4)photoelectrode,and its water splitting rate is 11.3 times higher than bare BiVO_(4).The PEC studies reveal that the spin coated Ni_(3)B crystal cocatalyst could effectively reduce the water oxidation barrier,and improve the surface charge injection efficiency to 94%,which could boost the photogenerated holes reaction to enhance the PEC performance of BiVO_(4)photoelectrode.

关 键 词：PHOTOELECTROCHEMICAL water splitting BiVO_(4) Ni_(3)B 

分 类 号：TQ116.2[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] O643.3[理学—物理化学]