Activation of H₂O Tailored by Interfacial Electronic States at a Nanoscale Interface for Enhanced Electrocatalytic Hydrogen Evolution.

ABSTRACT: Despite the fundamental and practical significance of the hydrogen evolution reaction (HER), the reaction kinetics at the molecular level are not well-understood, especially in basic media. Here, with ZIF-67-derived Co-based carbon frameworks (Co/NCs) as model catalysts, we systematically investigated the effects of different reaction parameters on the HER kinetics and discovered that the HER activity was directly dependent not on the type of nitrogen in the carbon framework but on the relative content of surface hydroxyl and water (OH^-/H₂O) adsorbed on Co active sites embedded in carbon frameworks. When the ratio of the OH^-/H₂O was close to 1:1, the Co/NC nanocatalyst showed the best reaction performance under the condition of high-pH electrolyt

SUBMITTER: Wang PY 

PROVIDER: S-EPMC9241158 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature