Carbonate electrolytes manipulate lattice oxygen dynamics of oxyhydroxides toward efficient and durable water oxidation.

ABSTRACT: Activating the lattice oxygen of catalysts can accelerate the oxygen evolution reaction. However, a fundamental understanding of the lattice oxygen dynamics remains insufficient, which ultimately impairs catalyst development. Herein, we show that a CO₃^2--containing electrolyte can substantially alter the reactivity and redox stability of lattice oxygens. In particular, for CoOOH and NiCoOOH, which feature high lattice oxygen reactivity, higher degrees of CO₃^2- intercalation deactivate lattice oxygen, shifting the reaction pathway from the lattice oxygen mechanism to the adsorbate evolution mechanism. Operando spectroscopic and spectrometric analyses coupled with ¹⁸O isotopic labeling corroborate the decreased metal‒oxygen bond covalenc

SUBMITTER: Ke L 

PROVIDER: S-EPMC12717159 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature