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Abstract
The activity of transition metal sulfides for the hydrogen evolution reaction (HER) can be increased by sulfur-enrichment 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.
Original language | English |
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Pages (from-to) | 106-111 |
Number of pages | 6 |
Journal | Electrochemistry Communications |
Volume | 81 |
Early online date | 16 Jun 2017 |
DOIs | |
Publication status | Published - 1 Aug 2017 |
Keywords
- Hydrogen evolution
- Nanoarrays
- Sulfidation
- Transition metal dichalcogenides
- Tungsten disulfide
ASJC Scopus subject areas
- Electrochemistry
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