析氧
电催化剂
催化作用
贵金属
水溶液
分解水
化学工程
氧气
过渡金属
土(古典元素)
材料科学
化学
碳纤维
纳米技术
无机化学
电化学
电极
光催化
有机化学
物理化学
复合材料
工程类
物理
复合数
生物化学
数学物理
作者
Jiahao Yu,Felipe A. Garcés‐Pineda,Jesús González‐Cobos,Marina Peña-Díaz,Celia Rogero,Sixto Giménez,Maria Chiara Spadaro,Jordi Arbiol,Sara Barja,José Ramón Galán‐Mascarós
标识
DOI:10.1038/s41467-022-32024-6
摘要
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.
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