Boosting solar water oxidation activity of BiVO_(4) photoanode through an efficient in-situ selective surface cation exchange strategy  

作　　者：Kai Song Fang He Ergang Zhou Lin Wang Huilin Hou Weiyou Yang 

机构地区：[1]School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China [2]Tianjin Key Laboratory of Composite and Functional Materials,Tianjin University,Tianjin 300350,China [3]Institute of Micro/Nano Materials and Devices,Ningbo University of Technology,Ningbo 315211,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2022年第5期49-59,共11页能源化学（英文版）

基　　金：supported by the project funded by the National Natural Science Foundation of China (52172222, 5197226 and 51972178);the China Postdoctoral Science Foundation(2020 M681966);the exchange project of the sixth ChinaNorthern Macedonia Science and Technology Meeting (6-11);the Natural Science Foundation of Ningbo Municipal Government(202003 N4164 and 2021J145)。

摘　　要：The sluggish kinetics for water oxidation is recognized as one of the major problems for the unsatisfied photoelectrochemical(PEC) performance. Herein, we developed a feasible strategy based on in-situ selective surface cation exchange, for activating surface water oxidation reactivity toward boosted PEC water oxidation of BiVO_(4) photoanodes with fundamentally improved surface charge transfer. The asconstructed Co/BiVO_(4) photoanodes exhibit 2.6 times increase in photocurrent density with superior stability, in comparison to those of pristine counterpart. Moreover, the faradaic efficiency of as-fabricated photoanode can be up to ~ 95% at 1.23 V(vs. RHE). The unique selective replacement of Bi by Co on the surface could modify the electronic structure of BiVO_(4) with reduced energy barrier of the deprotonation of OH^(+) to O, thus favoring the overall excellent PEC performance of Co/BiVO_(4) photoanode.

关 键 词：Cation exchange BIVO4 PHOTOELECTROCHEMICAL Water oxidation 

分 类 号：TQ116.21[化学工程—无机化工]