Sustainable oxygen evolution electrocatalysis in aqueous 1 M H₂SO₄ with earth abundant nanostructured Co₃O₄.

ABSTRACT: Earth-abundant electrocatalysts for the oxygen evolution reaction (OER) able to work in acidic working conditions are elusive. While many first-row transition metal oxides are competitive in alkaline media, most of them just dissolve or become inactive at high proton concentrations where hydrogen evolution is preferred. Only noble-metal catalysts, such as IrO₂, are fast and stable enough in acidic media. Herein, we report the excellent activity and long-term stability of Co₃O₄-based anodes in 1 M H₂SO₄ (pH 0.1) when processed in a partially hydrophobic carbon-based protecting matrix. These Co₃O₄@C composites reliably drive O₂ evolution a 10 mA cm^-2 current density for >40 h without appearance

SUBMITTER: Yu J 

PROVIDER: S-EPMC9329283 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature