观点
氧还原
氧还原反应
铂金
纳米技术
催化作用
化学
计算机科学
电化学
化学工程
还原(数学)
燃料电池
组合化学
生化工程
材料科学
工程类
电极
物理化学
物理
生物化学
数学
几何学
声学
作者
Zhong Ma,Zachary P. Cano,Aiping Yu,Zhongwei Chen,Gaopeng Jiang,Xiaogang Fu,Lin Yang,Tianpin Wu,Zhengyu Bai,Jun Lü
标识
DOI:10.1002/anie.202003654
摘要
Abstract Pt‐based electrocatalysts are considered as one of the most promising choices to facilitate the oxygen reduction reaction (ORR), and the key factor enabling their success is to reduce the required amount of platinum. Herein, we focus on illuminating both the theoretical mechanisms which enable enhanced and sustained ORR activity and the practical methods to achieve them in catalysts. The various multi‐step pathways of ORR are firstly reviewed and the rate‐determining steps based on the reaction intermediates and their binding energies are analyzed. We then explain the critical aspects of Pt‐based electrocatalysts to tune oxygen reduction properties from the viewpoints of active sites exposure and altering the surface electronic structure, and further summarize representative research progress towards practically achieving these activity enhancements with a focus on platinum size reduction, shape control and core Pt elimination methods. We finally outline the remaining challenges and provide our perspectives with regard to further enhancing their activities.
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