Regulating metal-oxygen covalency in reconstructed sulfurized high-entropy perovskite to activate and stabilize lattice oxygen for the oxygen evolution reaction.

ABSTRACT: Switching the adsorbate evolution mechanism (AEM) to the lattice oxygen mechanism (LOM) can break the theoretical limit of catalytic activity for the oxygen evolution reaction (OER). However, it is difficult for LOM-dominated catalysts to simultaneously obtain high activity and stability because of their trade-off relationship. Here, we report a reconstructed sulfurized high-entropy perovskite (S-LaNiFeCoCrMnO₃), which possesses excellent activity with an overpotential of 165 mV and has a high catalytic stability for 1800 h at 10 mA cm^-2 toward the OER. Furthermore, S-LaNiFeCoMnCrO₃ as the anode catalyst in an anion exchange membrane water electrolyzer exhibits a high current density of 5.8 A cm^-2 at a cell voltage of 2.0 V. On-line differential

SUBMITTER: Li X 

PROVIDER: S-EPMC12486150 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature