Organic ligand nanoarchitectonics for BiVO_(4) photoanodes surface passivation and cocatalyst grafting  

作　　者：Jingyi Lin Xin Li Zhiliang Wang Runlu Liu Hui Pan Yixin Zhao Lingti Kong Yao Li Shenmin Zhu Lianzhou Wang 

机构地区：[1]State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Nanomaterials Centre,School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology,the University of Queensland,QLD 4072,Australia [3]School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [4]Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,Wuhan Institute of Technology,Wuhan 430205,China

出　　处：《Nano Research》2024年第5期3667-3674,共8页纳米研究（英文版）

基　　金：support from the National Natural Science Foundation of China(No.51672173,U1733130);Shanghai Science and Technology Committee(Nos.21ZR1435700,18520744700, 18JC1410500);Shanghai Jiao Tong University Medical Engineering Cross Research Program(No.YG2023ZD18).

摘　　要：Bismuth vanadate(BiVO_(4))is a promising photoanode material for efficient photoelectrochemical(PEC)water splitting,whereas its performance is inhibited by detrimental surface states.To solve the problem,herein,a low-cost organic molecule 1,3,5-benzenetricarboxylic acid(BTC)is selected for surface passivation of BiVO_(4) photoanodes(BVOs),which also provides bonding sites for Co^(2+)to anchor,resulting in a Co-BTC-BVO photoanode.Owing to its strong coordination with metal ions,BTC not only passivates surface states of BVO,but also provides bonding between BVO and catalytic active sites(Co^(2+))to form a molecular cocatalyst.Computational study and interfacial charge kinetic investigation reveal that chemical bonding formed at the interface greatly suppresses charge recombination and accelerates charge transfer.The obtained Co-BTC-BVO photoanode exhibits a photocurrent density of 4.82 mA/cm^(2) at 1.23 V vs.reversible hydrogen electrode(RHE)and a low onset potential of 0.22 VRHE under AM 1.5 G illumination,which ranks among the best photoanodes coupled with Co-based cocatalysts.This work presents a novel selection of passivation layers and emphasizes the significance of interfacial chemical bonding for the construction of efficient photoanodes.

关 键 词：bismuth vanadate PHOTOANODE water splitting surface passivation bridging ligands 

分 类 号：O64[理学—物理化学]