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

Jiahao Yu, Felipe A. Garcés-Pineda, Jesús González-Cobos, Marina Peña-Díaz, Celia Rogero, Sixto Giménez, Maria Chiara Spadaro, Jordi Arbiol, Sara Barja () and José Ramón Galán-Mascarós ()
Additional contact information
Jiahao Yu: Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST)
Felipe A. Garcés-Pineda: Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST)
Jesús González-Cobos: Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST)
Marina Peña-Díaz: CFM/MPC, (UPV/EHU-CSIC)
Celia Rogero: CFM/MPC, (UPV/EHU-CSIC)
Sixto Giménez: Institute of Advanced Materials (INAM), Universitat Jaume I
Maria Chiara Spadaro: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST
Jordi Arbiol: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST
Sara Barja: University of the Basque Country UPV/EHU
José Ramón Galán-Mascarós: Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST)

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: 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 of performance fatigue, successfully passing benchmarking protocols without incorporating noble metals. Our strategy opens an alternative venue towards fast, energy efficient acid-media water oxidation electrodes.

Date: 2022
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DOI: 10.1038/s41467-022-32024-6

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