Oxide Electrocatalysts Based on Earth-Abundant Metals for Both Hydrogen- and Oxygen-Evolution Reactions,ACS Sustainable Chemistry & Engineering

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Oxide Electrocatalysts Based on Earth-Abundant Metals for Both Hydrogen- and Oxygen-Evolution Reactions
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-28 , DOI: 10.1021/acssuschemeng.0c02498
Ram Krishna Hona ₁ , Surendra B. Karki ₁ , Farshid Ramezanipour ₁

Affiliation

A unique bifunctional oxide electrocatalyst capable of catalyzing both half-reactions of water splitting, namely, oxygen-evolution reaction (OER) and hydrogen-evolution reaction (HER), with the added capability of catalyzing HER in both acidic and basic media, a rare property in water-splitting catalysts, is reported. In addition to the bifunctional electrocatalytic properties, CaSrFeMnO_6−δ shows OER activity, which is even superior to the reported activities of precious-metal electrocatalysts, IrO₂ and RuO₂. The correlation of electrocatalysis with the charge-transport properties in the series Ca₂FeMnO_6−δ, CaSrFeMnO_6−δ, and Sr₂FeMnO_6−δ is demonstrated. Given the dependence of charge transport on structure and defects, this work unravels the interesting correlations between the triangle of structure, charge transport, and electrocatalytic activity for water splitting.

中文翻译：

富氢金属氧化物催化氢和氧演化反应的催化剂

一种独特的双功能氧化物电催化剂，能够催化水分解的半反应，即氧逸出反应（OER）和氢逸出反应（HER），并具有在酸性和碱性介质中催化HER的附加能力报道了在水分解催化剂中的性质。除了双功能电催化性能外，CaSrFeMnO6 _-δ还具有OER活性，甚至优于已报道的贵金属电催化剂IrO ₂和RuO _2的活性。Ca ₂ FeMnO6 _-δ，CaSrFeMnO6 _-δ和Sr ₂ FeMnO6 _-δ系列中电催化与电荷传输性质的相关性被证明。考虑到电荷传输对结构和缺陷的依赖性，这项工作揭示了结构三角形，电荷传输和水分解的电催化活性之间有趣的相关性。

更新日期：2020-08-10

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