Hydrogen spillover in complex oxide multifunctional sites improves acidic hydrogen evolution electrocatalysis.

ABSTRACT: Improving the catalytic efficiency of platinum for the hydrogen evolution reaction is valuable for water splitting technologies. Hydrogen spillover has emerged as a new strategy in designing binary-component Pt/support electrocatalysts. However, such binary catalysts often suffer from a long reaction pathway, undesirable interfacial barrier, and complicated synthetic processes. Here we report a single-phase complex oxide La₂Sr₂PtO_7+δ as a high-performance hydrogen evolution electrocatalyst in acidic media utilizing an atomic-scale hydrogen spillover effect between multifunctional catalytic sites. With insights from comprehensive experiments and theoretical calculations, the overall hydrogen evolution pathway proceeds along three steps: fast proton adsorptio

SUBMITTER: Dai J 

PROVIDER: S-EPMC8897394 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature