Tuning surface electronegativity of BiVO4 photoanodes toward high-performance water splitting
Bi YP(毕迎普)1; Chou LJ(丑凌军)1; Zhang BB(张贝贝)1,2
刊名Applied Catalysis B: Environmental
2019-10-06
卷号262期号:-页码:118267
关键词Fluorination Hydrogen Water splitting Charge separation
DOI10.1016/j.apcatb.2019.118267
英文摘要

Photoelectrochemical (PEC) water splitting is a promising technique for converting solar energy into hydrogen fuels, while its practical applications are mainly restricted by the relatively low photo-conversion efficiencies. Herein, we demonstrated a simple surface fluorination process for drastically promoting the PEC water oxidation activity of BiVO4 photoanodes, achieving a remarkable photocurrent density of 3.2 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE) under AM 1.5 G illumination, one of the highest values of BiVO4 electrodes without cocatalysts. After in-situ formation of CoF2 cocatalysts, the photocurrent density could be further increased up to 5.1 mA cm−2 (1.23 VRHE), accompanying by a remarkably negative shift of onset-potential (270 mV). Systematic studies clearly reveal that tuning surface electronegativity of BiVO4 photoanodes could drastically promote the charge separation efficiencies of both surface and bulk up to nearly 100%. This work may provide a facile but effective approach for constructing the highly efficient BiVO4 photoanodes for solar water splitting.

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语种英语
内容类型期刊论文
源URL[http://ir.licp.cn/handle/362003/26009]  
专题兰州化学物理研究所_OSSO国家重点实验室
兰州化学物理研究所_ERC国家工程研究中心
通讯作者Bi YP(毕迎普); Chou LJ(丑凌军)
作者单位1.State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, CAS, Lanzhou, Gansu 730000, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
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Bi YP,Chou LJ,Zhang BB. Tuning surface electronegativity of BiVO4 photoanodes toward high-performance water splitting[J]. Applied Catalysis B: Environmental,2019,262(-):118267.
APA Bi YP,Chou LJ,&Zhang BB.(2019).Tuning surface electronegativity of BiVO4 photoanodes toward high-performance water splitting.Applied Catalysis B: Environmental,262(-),118267.
MLA Bi YP,et al."Tuning surface electronegativity of BiVO4 photoanodes toward high-performance water splitting".Applied Catalysis B: Environmental 262.-(2019):118267.
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