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Electrochemical sulfidation of WS 2 nanoarrays: Strong dependence of hydrogen evolution activity on transition metal sulfide surface composition
Daniel Escalera-López,
Ross Griffin,
Mark Isaacs,
Karen Wilson,
Richard Palmer 
,
Neil V. Rees
,
Neil V. Rees
Electrochemistry Communications, Volume: 81, Pages: 106 - 111
Swansea University Author:
Richard Palmer
-
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DOI (Published version): 10.1016/j.elecom.2017.06.016
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 co...
| Published in: | Electrochemistry Communications |
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| ISSN: | 1388-2481 |
| Published: |
2017
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa35839 |
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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. |
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| Keywords: |
Transition metal dichalcogenidesHydrogen evolutionSulfidationTungsten disulfideNanoarrays |
| College: |
Faculty of Science and Engineering |
| Start Page: |
106 |
| End Page: |
111 |