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

作者：Jiahao Yu, Felipe Andrés Garcés-Pineda, Jesús González‐Cobos, Marina Peña-Díaz, Celia Rogero, Sixto Giménez, María Chiara Spadaro, Jordi Arbiol, Sara Barja, José Ramón Galán‐Mascarós · 发表于：Nature Communications · 年份：2022 · DOI：10.1038/s41467-022-32024-6 · 被引用次数：154 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Electrochemical Analysis and Applications

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 IrO 2 , are fast and stable enough in acidic media. Herein, we report the excellent activity and long-term stability of Co 3 O 4 -based anodes in 1 M H 2 SO 4 (pH 0.1) when processed in a partially hydrophobic carbon-based protecting matrix. These Co 3 O 4 @C composites reliably drive O 2 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.