High-Valence Metals Accelerate the Reaction Kinetics for Boosting Water Oxidation.

ABSTRACT: The transition metal with high valence state in oxyhydroxides can accelerate the reaction kinetics, enabling highly intrinsic OER activity. However, the formation of high-valence transition-metal ions is thermodynamically unfavorable in most cases. Here, a novel strategy is proposed to realize the purpose and reveal the mechanism by constructing amorphous phase and incorporating of elements with the characteristic of Lewis acid or variable charge state. A model catalyst, CeO₂-NiFeO_xH_y, is presented to achieve the modulation of valence state of active site (Ni²⁺→Ni³⁺→Ni⁴⁺) for improved OER, leading to dominant active sites with high valence state. The CeO₂-NiFeO_xH_y electrode exhibits superior

SUBMITTER: Li L 

PROVIDER: S-EPMC11817933 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature