Charge self-regulation in 1T'''-MoS₂ structure with rich S vacancies for enhanced hydrogen evolution activity.

ABSTRACT: 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-MoS₂ 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 MoS₂ (1T'''-MoS₂) structure, which is favarable for the generation of active electronic states to boost the hydrogen evolution reaction activity. The optimal 1T'''-MoS₂ sample exhibits a low overpotential of 158 mV at 10 mA cm^-2 and a Tafel slope of 74.5 mV dec^-1 in acidic conditions, which are far exceeding

SUBMITTER: Guo X 

PROVIDER: S-EPMC9550810 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature