Systematic engineering of BiVO_(4)photoanode for efficient photoelectrochemical water oxidation  

作　　者：Zhiting Liang Meng Li Kai‐Hang Ye Tongxin Tang Zhan Lin Yuying Zheng Yongchao Huang Hongbing Ji Shanqing Zhang 

机构地区：[1]Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou,China [2]Chemical Engineering Guangdong Laboratory,Jieyang Branch of Chemistry,Jieyang,China [3]Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Institute of Environmental Research at Greater Bay Area,Ministry of Education,Guangzhou University,Guangzhou,China [4]State Key Laboratory Breeding Base of Green‐Chemical Synthesis Technology,Institute of Green Petroleum Processing and Light Hydrocarbon Conversion,College of Chemical Engineering,Zhejiang University of Technology,Hangzhou,China [5]School of Environment and Science,Centre for Catalysis and Clean Energy,Griffith University,Gold Coast Campus,Southport,Queensland,Australia

出　　处：《Carbon Energy》2024年第4期12-21,共10页碳能源（英文）

基　　金：Natural Science Foundation of China,Grant/Award Number:22108042;Guangzhou(202201020147)。

摘　　要：BiVO_(4)is one of the most promising photoanode materials for photoelectrochemical(PEC)solar energy conversion,but it still suffers from poor photocurrent density due to insufficient light‐harvesting efficiency(LHE),weak photogenerated charge separation efficiency(Φ_(Sep)),and low water oxidation efficiency(Φ_(OX)).Herein,we tackle these challenges of the BiVO_(4)photoanodes using systematic engineering,including catalysis engineering,bandgap engineering,and morphology engineering.In particular,we deposit a NiCoO_(x)layer onto the BiVO_(4)photoanode as the oxygen evolution catalyst to enhance theΦ_(OX)of Fe‐g‐C_(3)N_(4)/BiVO_(4)for PEC water oxidation,and incorporate Fe‐doped graphite‐phase C_(3)N_(4)(Fe‐g‐C_(3)N_(4))into the BiVO_(4)photoanode to optimize the bandgap and surface areas to subsequently expand the light absorption range of the photoanode from 530 to 690 nm,increase the LHE andΦ_(Sep),and further improve the oxygen evolution reaction activity of the NiCoO_(x)catalytic layer.Consequently,the maximum photocurrent density of the as‐prepared NiCoO_(x)/Fe‐g‐C_(3)N_(4)/BiVO_(4)is remarkably boosted from 4.6 to 7.4 mA cm^(−2).This work suggests that the proposed systematic engineering strategy is exceptionally promising for improving LHE,Φ_(Sep),andΦ_(OX)of BiVO_(4)‐based photoanodes,which will substantially benefit the design,preparation,and large‐scale application of next‐generation high‐performance photoanodes.

关 键 词：bismuth vanadate carbon nitride charge separation HETEROJUNCTION water oxidation 

分 类 号：O646[理学—物理化学]