Investigation of the origin of the enhanced photoelectrochemical performance of gradient W-doped bismuth vanadate (BiVO4) photoanodes

被引：4
作者：
Won, Jung Yoon [1 ]
Pan, Zhenhua [2 ]
Pihosh, Yuriy [3 ]
Sohn, Woon Yong [1 ]
机构：
[1] Chungbuk Natl Univ, Dept Chem, Chungdae Ro 1, Cheongju 28644, Chungbuk, South Korea
[2] Chuo Univ, Fac Sci & Technol, Dept Appl Chem, 1-13-27 Kasuga, Bunkyo, Tokyo 1128551, Japan
[3] Univ Tokyo, Res Ctr Adv Sci & Technol, 4-6-1,Komaba,Meguro Ku, Tokyo 1538904, Japan
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 54卷
基金：
新加坡国家研究基金会;
关键词：
Bismuth vanadate (BiVO 4 ); Photo-electrochemical cell; Water splitting; Gradient doping; Time-resolved spectroscopy; Heterodyne transient grating; CHARGE-CARRIER DYNAMICS; WATER OXIDATION; WO3/BIVO4; HETEROJUNCTION; HEMATITE PHOTOANODES; MONOCLINIC BIVO4; RECOMBINATION; SEPARATION; PHOTOCURRENT; DEPENDENCE; KINETICS;
D O I：
10.1016/j.ijhydene.2023.12.148
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Gradient W-doped Bismuth vanadate (BiVO4) photoanodes were fabricated to figure out the main factor improving the photoelectrochemical (PEC) performance, achieved by the gradient doping. We found that the film in which the concentration of W in the bulk was higher than that in the surface showed the highest photocurrent density, compared to those of other samples, which could be mainly attributed to the improvement of the charge transfer efficiency. It means that W existing on the surface of BiVO4 played a crucial role in the enhancement of the water splitting efficiency and the charge separation achieved by the built-in electric field modestly contributed to the improvement of the performance.
引用
收藏
页码：1544 / 1551
页数：8
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