biostudies-literatureUnknown13(1)Yu JEarth-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 appearanceNature communications4341https://www.ebi.ac.uk/biostudies/studies/S-EPMC9329283biostudies-literatureSustainable oxygen evolution electrocatalysis in aqueous 1 M H₂SO₄ with earth abundant nanostructured Co₃O₄.PMC9329283Rogero CPena-Diaz MBarja SArbiol JGimenez SSpadaro MCGalan-Mascaros JRGonzalez-Cobos JYu JGarces-Pineda FAfalseSustainable oxygen evolution electrocatalysis in aqueous 1 M H₂SO₄ with earth abundant nanostructured Co₃O₄.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 appearance2022-01-01T00:00:00Z2022 Jul2026-05-09T15:30:39.098Z2022-08-06T14:55:43.349ZS-EPMC93292833589654110.1038/s41467-022-32024-6