Boosting solar water oxidation activity of BiVO4 photoanode through an efficient in-situ selective surface cation exchange strategy

被引:3
|
作者
Kai Song [1 ,2 ,3 ]
Fang He [1 ,2 ]
Ergang Zhou [3 ]
Lin Wang [3 ]
Huilin Hou [3 ]
Weiyou Yang [3 ]
机构
[1] School of Materials Science and Engineering, Tianjin University
[2] Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University
[3] Institute of Micro/Nano Materials and Devices, Ningbo University of Technology
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
D O I
暂无
中图分类号
TQ116.21 [];
学科分类号
0817 ;
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 BiVO4photoanodes with fundamentally improved surface charge transfer. The asconstructed Co/BiVO4photoanodes 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 BiVO4with reduced energy barrier of the deprotonation of OH~* to O, thus favoring the overall excellent PEC performance of Co/BiVO4photoanode.
引用
收藏
页码:49 / 59
页数:11
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