Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 57, Pages 30160-30170Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.09.199
Keywords
Water splitting; Bismuth vanadate; Photoelectrochemical; Heterojunction photoanode
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Funding
- National Natural Science Foundation of China [51702025, 51874050, 51574047]
- Natural Science Foundation of Jiangsu Province [BK20160277]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Monoclinic bismuth vanadate has been widely used as a promising n-type semiconductor for photoelectrochemical (PEC) water decomposition due to its high reserves, good stability in neutral solutions, and relatively narrow band gap. Here, we developed a simple method to prepare a thin NiOOH layer on the surface of BiVO4 nanorod arrays. The heterostructured photoanode shows great enhancement for the photocurrent density of 2.7 mA cm(-2) at 1.23 V vs. RHE, which is similar to 2.3 times higher than that of pristine BiVO4 electrode, due to NiOOH as an efficient oxygen-releasing catalyst with abundant oxygen vacancies. The NiOOH/BiVO4 photoanodes are systematically studied with X-ray diffraction, Raman, X-ray photoelectron spectra, scanning electron microscopy, transmission electron microscopy, and UV-vis diffuse-reflectance spectrum. The heterostructured photoanode shows excellent PEC activity, which can provide a promising and easy strategy to prepare such photoanode with high-efficient oxygen evolution co-catalysts. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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