期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 6, 页码 3223-3234出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.12.181
关键词
Amorphous MoSx; TiO2 nanosheet; Hydrogen evolution reaction; Cocatalyst; Photocatalysis
资金
- Natural Science Foundation of Hubei Province [2015CFB412]
- National Training Programs of Innovation for Undergraduates [201610486058]
Semiconductor-based photocatalytic hydrogen production is a promising approach to convert solar energy to renewable and clean hydrogen energy. However, development of cheap and efficient hydrogen evolution cocatalyst to replace noble metal based cocatalysts remains a challenge. Here, we report a MoSx/TiO2 nanohybrid prepared by a facile photo assisted deposition method. The amorphous MoSx grows intimately on the single crystalline TiO2 nanosheet with {001} facets exposed to form a heterojunction, which can not only facilitate the charge separation and transfer, but also provide plenty of active sites for hydrogen evolution reaction owing to abundant unsaturated S atoms on amorphous MoSx. As a result, the MoSx/TiO2 nanohybrid shows a remarkable enhancement in photocatalytic hydrogen evolution performance in comparison to bare TiO2 nanosheet. The best 0.5%-MoSx/TiO2 nanohybrid exhibits a hydrogen production rate at 1835.7 mu mol g(-1) h(-1) under Xenon light irradiation, which is about 177 times higher than that of bare TiO2 nanosheet. This work paves a way for the design and construction of low-cost and noble metal-free photocatalysts for efficient photocatalytic hydrogen evolution. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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