期刊
NANOTECHNOLOGY
卷 30, 期 40, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab2d49
关键词
hydrogen evolution reaction; cobalt sulfide; electrocatalysts
资金
- National Natural Science Foundation of China [21822509, U1810110, 51502063]
- Science and Technology Planning Project of Guangdong Province [2018A050506028]
- Fundamental Research Foundation for Universities of Heilongjiang Province [LGYC2018JQ006]
- Science Funds for Young Innovative Talents of HUST [201505]
Exploring new non-noble metallic catalysts with highly efficient and stable catalytic performance toward a hydrogen evolution reaction (HER) is a major requirement in the field of electrochemical water splitting. In this study, we report a facile strategy to synthesize a three-dimensional (3D) porous TiO2/Co9S8 core-branch nanosheet arrays on Ni foam with superior HER catalytic activity. The hierarchically 3D porous architecture not only provides rich active sites, but also enables fast electron transport and easy electrolyte permeation. Consequently, the TiO2/Co9S8 core-branch nanosheet arrays achieve a remarkably low overpotential of 150 mV at 10 mA cm(-2), small Tafel slope of 71 mV Dec(-1) and outstanding long-term stability for the HER reaction. The elaborate design should provide a new strategy to controllably synthesize porous and rational nanostructured materials as a prominent electrocatalyst for water splitting applications.
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