期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 640, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.128412
关键词
BiVO4; Zn-MOF; Photoelectrochemical; Hydrogen energy; Water splitting; Photoanode
资金
- National Natural Science Foundation of China [22075112]
- Open Project of State Key Laboratory of Rare Earth Resource Utilizations [RERU2021013]
In this study, Zn-MOF material with large surface area and abundant active sites was decorated on BiVO4 photoanode to enhance its photoelectrochemical (PEC) activity. The decorated BiVO4/Zn-MOF showed significantly improved photocurrent, charge separation efficiency, and charge injection efficiency, indicating the crucial role of Zn-MOF in constructing high-performance PEC water splitting system.
Bismuth vanadate (BiVO4) is a promising photoanode material, which can be used for solar energy driven photoelectrochemical (PEC) water splitting to produce hydrogen at room-temperature. However, the PEC performance of BiVO4 is still seriously hindered due to low carrier transmission efficiency and slow water oxidation kinetics. Here, Zn-MOF with large surface area and abundant exposed active sites was decorated on BiVO4 photoanode, exhibiting boosted PEC activity. The optimal photocurrent of BiVO4/Zn-MOF reaches 3.1 times of that of bare BiVO4. The charge separation efficiency of BiVO4/Zn-MOF increased to 50.46%, about 2.16 times of BiVO4. The charge injection efficiency of BiVO4/Zn-MOF rises from 14.0% to 76.8%. The improved carrier transport efficiency and reaction kinetics suggest that Zn-MOF material plays crucial role in the construction of high performance PEC water splitting system.
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