Abstract
BiVO4 has emerged as a promising material for solar water splitting. The poor ability of charge transport and separation always limits its performance for photoelectrochemical water splitting. Herein, we coupled n-type BiVO4 with p-type LaFeO3 and LaCoO3, achieving a photocurrent more than two times as high as bare BiVO4 at 1.23 V versus a reversible hydrogen electrode. Also, the onset potential was negatively shifted about 260 mV. The promotion of performance is mainly because the space charge layer in BiVO4 is broadened, and the band bend is enhanced, which facilitates the separation and transport of photo-generated charges.
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Acknowledgements
This work was supported by the National Basic Research Program of China (973 Program, 2013CB632404), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the National Natural Science Foundation of China (21473090 and U1663228).
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Li, Y., Hu, Y., Fang, T. et al. Promoted photoelectrochemical activity of BiVO4 coupled with LaFeO3 and LaCoO3 . Res Chem Intermed 44, 1013–1024 (2018). https://doi.org/10.1007/s11164-017-3149-3
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DOI: https://doi.org/10.1007/s11164-017-3149-3