Enhanced Photoelectrochemical Performance of BiVO4 by a NiMoO4 Modification
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In this work, porous BiVO4 thin films were deposited on the FTO glass through a spin-coating deposition method and their photoelectrochemical (PEC) properties were investigated. Further, the BiVO4 thin film was modified with a NiMoO4 thin layer for enhancing its PEC activity. It is demonstrated that the applied bias photo-to-current conversion efficiency is increased by 63% after a surface modification, which is ascribed to both the formation of a p–n junction and the suppressed carrier recombination rate by terms of the electrochemical impedance spectroscopy. Finally, a schematic band model is also proposed to clarify the charge carrier transfer mechanism which is responsible for the enhanced PEC performance.
KeywordsNiMoO4 BiVO4 photoelectrochemical water splitting
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This work is financially supported by Postgraduate Research and Practice Program of Education and Teaching Reform of CUMT (No. YJSJG-2018-042).
- 21.L. Wang, X. Gu, Y. Zhao, M. Wei, Y. Qiang, and Y. Zhao, J. Mater. Sci.: Mater. Electron. 29, 19278 (2018).Google Scholar