Charge self-regulation in 1T'''-MoS2 structure with rich S vacancies for enhanced hydrogen evolution activity
書誌事項
- 公開日
- 2022-10-10
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/s41467-022-33636-8
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>Active electronic states in transition metal dichalcogenides are able to prompt hydrogen evolution by improving hydrogen absorption. However, the development of thermodynamically stable hexagonal 2H-MoS<jats:sub>2</jats:sub> as hydrogen evolution catalyst is likely to be shadowed by its limited active electronic state. Herein, the charge self-regulation effect mediated by tuning Mo−Mo bonds and S vacancies is revealed in metastable trigonal MoS<jats:sub>2</jats:sub> (1T'''-MoS<jats:sub>2</jats:sub>) structure, which is favarable for the generation of active electronic states to boost the hydrogen evolution reaction activity. The optimal 1T'''-MoS<jats:sub>2</jats:sub> sample exhibits a low overpotential of 158 mV at 10 mA cm<jats:sup>−2</jats:sup> and a Tafel slope of 74.5 mV dec<jats:sup>−1</jats:sup> in acidic conditions, which are far exceeding the 2H-MoS<jats:sub>2</jats:sub> counterpart (369 mV and 137 mV dec<jats:sup>−1</jats:sup>). Theoretical modeling indicates that the boosted performance is attributed to the formation of massive active electronic states induced by the charge self-regulation effect of Mo−Mo bonds in defective 1T'''-MoS<jats:sub>2</jats:sub> with rich S vacancies.</jats:p>
収録刊行物
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- Nature Communications
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Nature Communications 13 (1), 2022-10-10
Springer Science and Business Media LLC
