Single-zinc vacancy unlocks high-rate H₂O₂ electrosynthesis from mixed dioxygen beyond Le Chatelier principle.

ABSTRACT: Le Chatelier's principle is a basic rule in textbook defining the correlations of reaction activities and specific system parameters (like concentrations), serving as the guideline for regulating chemical/catalytic systems. Here we report a model system breaking this constraint in O₂ electroreduction in mixed dioxygen. We unravel the central role of creating single-zinc vacancies in a crystal structure that leads to enzyme-like binding of the catalyst with enhanced selectivity to O₂, shifting the reaction pathway from Langmuir-Hinshelwood to an upgraded triple-phase Eley-Rideal mechanism. The model system shows minute activity alteration of H₂O₂ yields (25.89~24.99 mol g_cat^-1 h^-1) and Faradaic efficiencies (92.5%~

SUBMITTER: Huang Q 

PROVIDER: S-EPMC11098813 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature