期刊
SMALL
卷 12, 期 28, 页码 3802-3809出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201601168
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资金
- National Natural Science Foundation of China [21373065, 61474033, 61574050]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040201]
- Ministry of Science and Technology of China [2012CB934103]
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
- Youth Innovation Promotion Association CAS
Transition metal dichalcogenides (TMDs), as one of potential electrocatalysts for hydrogen evolution reaction (HER), have been extensively studied. Such TMD-based ternary materials are believed to engender optimization of hydrogen adsorption free energy to thermoneutral value. Theoretically, cobalt is predicted to actively promote the catalytic activity of WS2. However, experimentally it requires systematic approach to form CoxW(1-x)S2 without any concomitant side phases that are detrimental for the intended purpose. This study reports a rational method to synthesize pure ternary CoxW(1-x)S2 nanosheets for efficiently catalyzing HER. Benefiting from the modification in the electronic structure, the resultant material requires overpotential of 121 mV versus reversible hydrogen electrode (RHE) to achieve current density of 10 mA cm(-2) and shows Tafel slope of 67 mV dec(-1). Furthermore, negligible loss of activity is observed over continues electrolysis of up to 2 h demonstrating its fair stability. The finding provides noticeable experimental support for other computational reports and paves the way for further works in the area of HER catalysis based on ternary materials.
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