Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 33, Pages 16550-16559Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.04.135
Keywords
WO3; CuWO4; Co-catalyst; Heterojunction; Photoelectrochemical
Categories
Funding
- Science Funds of Tianjin for Distinguished Young Scholar [17JCJQJC44800]
- Key Research and Development Plan of Tianjin [19YFSLQY00020]
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In order to enhance the photoelectrochemical (PEC) performance of tungsten oxide (WO3), it is critical to overcome the problems of narrow visible light absorption range and low carrier separation efficiency. In this work, we firstly prepared the 2D plate-like WO3/CuWO4 uniform core-shell heterojunction through in-situ synthesis method. After modification with the amorphous Co-Pi co-catalyst, the ternary uniform core-shell structure photoanode achieved a photocurrent of 1.4 mA/cm(2) at 1.23 V vs. RHE, which was about 6.67 and 1.75 times higher than that of pristine WO3 and 2D uniform core-shell heterojunction, respectively. Furthermore, the onset potential of 2D WO3/CuWO4/Co-Pi core-shell heterojunction occurred a negatively shifts of about 20 mV. Experiments illuminated that the enhanced PEC performance of WO3/CuWO4/Co-Pi photoanode was attributed to the broader light absorption, reduced carrier transfer barrier and increased carrier separation efficiency. The work provides a strategy of maximizing the advantages of core-shell heterojunction and co-catalyst to achieve effective PEC performance. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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