Unveiling the structural transformation and activity origin of heteroatom-doped carbons for hydrogen evolution.

ABSTRACT: Heteroatom-doped carbon materials have been widely used in many electrocatalytic reduction reactions. Their structure-activity relationships are mainly explored based on the assumption that the doped carbon materials remain stable during electrocatalysis. However, the structural evolution of heteroatom-doped carbon materials is often ignored, and their active origins are still unclear. Herein, taking N-doped graphite flake (N-GP) as the research model, we present the hydrogenation of both N and C atoms and the consequent reconstruction of the carbon skeleton during the hydrogen evolution reaction (HER), accompanied by a remarkable promotion of the HER activity. The N dopants are gradually hydrogenated and almost completely dissolved in the form of ammonia. Theoretical simulations demonstra

SUBMITTER: Lu S 

PROVIDER: S-EPMC10193929 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature