Modifying redox properties and local bonding of Co₃O₄ by CeO₂ enhances oxygen evolution catalysis in acid.

ABSTRACT: Developing efficient and stable earth-abundant electrocatalysts for acidic oxygen evolution reaction is the bottleneck for water splitting using proton exchange membrane electrolyzers. Here, we show that nanocrystalline CeO₂ in a Co₃O₄/CeO₂ nanocomposite can modify the redox properties of Co₃O₄ and enhances its intrinsic oxygen evolution reaction activity, and combine electrochemical and structural characterizations including kinetic isotope effect, pH- and temperature-dependence, in situ Raman and ex situ X-ray absorption spectroscopy analyses to understand the origin. The local bonding environment of Co₃O₄ can be modified after the introduction of nanocrystalline CeO₂, which allows the Co

SUBMITTER: Huang J 

PROVIDER: S-EPMC8144612 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature