Ni-Doped BiVO4 photoanode for efficient photoelectrochemical water splitting

被引：43

作者：

Chen, Meihong ^{[1
]}

Chang, Xiaobo ^{[1
]}

Li, Can ^{[1
]}

Wang, Hongqiang ^{[2
,3
]}

Jia, Lichao ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Mat Sci & Engn, Key Lab Appl Surface & Colloid Chem, Shaanxi Key Lab Adv Energy Devices,Natl Minist Edu, 620 West Changan St, Xian 710119, Shaanxi, Peoples R China

[2] Northwestern Polytech Univ, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[3] Shaanxi Joint Lab Graphene, Xian 710072, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2023年 / 640卷

基金：

中国国家自然科学基金;

关键词：

BiVO4; Ni-BiVO4; FeOOH cocatalyst; Photoelectrochemical water splitting; METAL-ORGANIC FRAMEWORK; NANOTUBES PHOTOANODE; CARRIER DYNAMICS; OXYGEN VACANCIES; DEPOSITION; OXIDATION; CELLS; ZN;

D O I：

10.1016/j.jcis.2023.02.096

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：

BiVO4 (BVO) based photoanode is one of the most mega-potential materials for solar water splitting while suffers from poor charge transfer and separation efficiency limit its practical application. Herein, FeOOH/ Ni-BiVO4 photoanode synthesized by the facile wet chemical method were investigated for improved charge transport and separation efficiency. The photoelectrochemical (PEC) measurements demonstrate that the water oxidation photocurrent density can reach as high as 3.02 mA cm-2 at 1.23 V vs RHE, and the surface separation efficiency can be boosted to 73.3 %, which increases around 4 times comparing with that of pure sample. Further depth studies showed that the Ni doping can effectively promote hole transport/trapping and introduce more active sites for the oxidation of water, while FeOOH co-catalyst could passivate the Ni-BiVO4 photoanode surface. This work provides a model for the design of BiVO4- based photoanodes with combined thermodynamic and kinetic advantages.(c) 2023 Elsevier Inc. All rights reserved.

引用

页码：162 / 169

页数：8

共 45 条

[1] Ultrafast carrier dynamics in BiVO4 thin film photoanode material: interplay between free carriers, trapped carriers and low-frequency lattice vibrations [J].