期刊
SMALL
卷 16, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202003007
关键词
density functional theory; hydrogen evolution reaction; metallic Re; oxygen evolution reaction ReS2; S defects
类别
资金
- Central Plains Academician Fund of Henan Province [22180017]
- China Postdoctoral Science Foundation [2019M652570, 2019M650172]
- Support Plan for College Science and Technology Innovation Team of Henan Province [16IRTSTHN001]
- Science and Technology Innovation Talent Plan of Henan Province [174200510018]
The design on synthesizing a sturdy, low-cost, clean, and sustainable electrocatalyst, as well as achieving high performance with low overpotential and good durability toward water splitting, is fairly vital in environmental and energy-related subject. Herein, for the first time the growth of sulfur (S) defect engineered self-supporting array electrode composed of metallic Re and ReS(2)nanosheets on carbon cloth (referred as Re/ReS2/CC) via a facile hydrothermal method and the following thermal treatment with H-2/N(2)flow is reported. It is expected that, for example, the as-prepared Re/ReS2-7H/CC for the electrocatalytic hydrogen evolution reaction (HER) under acidic medium affords a quite low overpotential of 42 mV to achieve a current density of 10 mA cm(-2)and a very small Tafel slope of 36 mV decade(-1), which are comparable to some of the promising HER catalysts. Furthermore, in the two-electrode system, a small cell voltage of 1.30 V is recorded under alkaline condition. Characterizations and density functional theory results expound that the introduced S defects in Re/ReS2-7H/CC can offer abundant active sites to advantageously capture electron, enhance the electron transport capacity, and weaken the adsorption free energy of H* at the active sites, being responsible for its superior electrocatalytic performance.
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