OER电催化剂的结构重构及同步辐射研究

doi:10.52396/JUST-2021-0193

摘要/Abstract

摘要： 探索高性能电化学析氧反应(OER)催化剂是可再生能源储存和转化的关键.OER过程中的结构重构被认为是高活性催化剂的关键,而追踪OER过程中催化剂的动态变化及识别真正的活性位点则具有挑战性.同步辐射技术能够获得材料中具体元素的局域原子配位环境和电子结构信息,特别是原位测试允许在工况下监测表面氧化状态和局部原子结构转变,能够促进对反应机理的基本理解.因此,在这篇综述中,我们讨论了重构OER电催化剂的最新进展和未来的机遇,重点综述了OER电催化剂重构的诱因及应用、利用原位同步辐射技术追踪重构OER电催化剂的动态过程以及识别真正的活性位点.最后,我们对重构OER电催化剂的发展和推广中存在的挑战和机遇进行了展望,希望为先进OER电催化剂的合理设计提供指导.

关键词: OER, 电催化剂, 结构重构, 同步辐射, 原位表征

Abstract: Self-reconstruction during oxygen evolution reaction (OER) process is considered to be the key to highly active catalysts, while tracking the dynamic changes of catalysts during OER process and identifying the true active sites are challenging. Synchrotron radiation characterizations can obtain the local atomic coordination environment and electron information of specific elements in materials. In particular, in-situ characterization methods can monitor the dynamic evolution of surface oxidation state and local atomic structure transformation under working conditions, which can promote the fundamental understanding of the reaction mechanism. In this review, we discuss recent advances and propose some perspectives in self-reconstruction of OER electrocatalysts, which mainly summarizes the fundamental origin of self-reconstruction behavior and the application of in-situ synchrotron radiation characterization technology to track the dynamic process of self-reconstruction process and to identify the true active sites. Finally, we put forward some challenges and prospects for the development and promotion of self-reconstruction of OER electrocatalysts, hoping to provide guidance for the rational design of advanced OER electrocatalysts.

Key words: OER, electrocatalyst, structural self-reconstruction, synchrotron radiation, in situ characterizations

中图分类号:

O643.36

刘崇静, 圣蓓蓓, 曹登丰, 陈双明, 宋礼. OER电催化剂的结构重构及同步辐射研究[J]. 中国科学技术大学学报, 2021, 51(11): 787-801.

LIU Chongjing, SHENG Beibei, CAO Dengfeng, CHEN Shuangming, SONG Li. Structural self-reconstruction and synchrotron radiation characterization of oxygen evolution reaction electrocatalysts[J]. Journal of University of Science and Technology of China, 2021, 51(11): 787-801.

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