Water induced ultrathin Mo₂C nanosheets with high-density grain boundaries for enhanced hydrogen evolution.

ABSTRACT: Grain boundary controlling is an effective approach for manipulating the electronic structure of electrocatalysts to improve their hydrogen evolution reaction performance. However, probing the direct effect of grain boundaries as highly active catalytic hot spots is very challenging. Herein, we demonstrate a general water-assisted carbothermal reaction strategy for the construction of ultrathin Mo₂C nanosheets with high-density grain boundaries supported on N-doped graphene. The polycrystalline Mo₂C nanosheets are connected with N-doped graphene through Mo-C bonds, which affords an ultra-high density of active sites, giving excellent hydrogen evolution activity and superior electrocatalytic stability. Theoretical calculations reveal that the d_z²

SUBMITTER: Yang Y 

PROVIDER: S-EPMC9700844 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature