期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 81, 期 -, 页码 106-111出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.06.016
关键词
Transition metal dichalcogenides; Hydrogen evolution; Sulfidation; Tungsten disulfide; Nanoarrays
资金
- EPSRC [EP/L015749/1]
- Centre for Doctoral Training in Fuel Cells and their Fuels [EP/G037116/1]
- Engineering and Physical Sciences Research Council [EP/D049245/1, EP/K006061/2, EP/E005918/1, EP/D037794/1, 1563958, GR/S24039/01, 1293982, GR/R89509/01, EP/E004563/1, EP/K006061/1] Funding Source: researchfish
- EPSRC [EP/D037794/1, EP/E004563/1, EP/K006061/1, EP/D049245/1, EP/E005918/1, EP/K006061/2] Funding Source: UKRI
The activity of transition metal sulfides for the hydrogen evolution reaction (HER) can be increased by sulfurenrichment of active metal-sulfide sites. In this report, we investigate the electrochemical sulfidation of atmospherically aged WS2 nanoarrays with respect to enhancing HER activity. In contrast to MoS2, it is found that sulfidation diminishes HER activity. Electrochemical and XPS experiments suggest the involvement of insoluble tungsten oxides in the altered HER and electron transfer properties. This demonstrates the strong dependence of the transition metal dichalcogenide (TMD) composition with the successful sulfur incorporation and subsequent HER activity.
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