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Atomic-Level Manipulations in Oxides and Alloys for Electrocatalysis of Oxygen Evolution and Reduction
ACS Nano ( IF 15.8 ) Pub Date : 2020-11-05 , DOI: 10.1021/acsnano.0c06411
Jumi Bak 1 , Yoon Heo 1 , Tae Gyu Yun 1 , Sung-Yoon Chung 1
Affiliation  

As chemical reactions and charge-transfer simultaneously occur on the catalyst surface during electrocatalysis, numerous studies have been carried out to attain an in-depth understanding on the correlation among the surface structure and composition, the electrical transport, and the overall catalytic activity. Compared with other catalysis reactions, a relatively larger activation barrier for oxygen evolution/reduction reactions (OER/ORR), where multiple electron transfers are involved, is noted. Many works over the past decade thus have been focused on the atomic-scale control of the surface structure and the precise identification of surface composition change in catalyst materials to achieve better conversion efficiency. In particular, recent advances in various analytical tools have enabled noteworthy findings of unexpected catalytic features at atomic resolution, providing significant insights toward reducing the activation barriers and subsequently improving the catalytic performance. In addition to summarizing important surface issues, including lattice defects, related to the OER and ORR in this Review, we present the current status and discuss future perspectives of oxide- and alloy-based catalysts in terms of atomic-scale observation and manipulation.

中文翻译:

氧化物和合金中原子水平的操纵,用于氧的释放和还原的电催化

由于在电催化过程中催化剂表面同时发生化学反应和电荷转移,因此进行了许多研究,以深入了解表面结构和组成,电迁移和整体催化活性之间的相关性。与其他催化反应相比,氧释放/还原反应(OER / ORR)涉及多个电子转移,因此具有相对较大的活化势垒。因此,过去十年中的许多工作都集中在表面结构的原子尺度控制和催化剂材料表面成分变化的精确识别上,以实现更好的转化效率。尤其是,各种分析工具的最新进展已使人们在原子分辨率上发现了出乎意料的催化特征,从而为减少活化障碍并随后改善催化性能提供了重要见识。除了在本综述中概述与OER和ORR相关的重要表面问题(包括晶格缺陷)之外,我们还介绍了当前状态并从原子尺度的观察和操作角度讨论了基于氧化物和合金的催化剂的未来观点。
更新日期:2020-11-25
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