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用于电催化剂的原位X射线衍射和吸收研究的电化学池的设计与应用

Design and application of an electrochemical cell for operando X-ray diffraction and absorption studies for electrocatalysts.

作者信息

Chen Jiajun, Li Zhenzhong, Zeng Huiyan, Deng Liting, Gu Long, Wang Chao, Yang Chunzhen, Sun Dongbai

机构信息

School of Materials, Sun Yat-Sen University, Shenzhen 518107, People's Republic of China.

School of Materials Science and Engineering and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510006, People's Republic of China.

出版信息

J Synchrotron Radiat. 2025 Sep 1;32(Pt 5):1272-1281. doi: 10.1107/S1600577525005612. Epub 2025 Aug 15.

DOI:10.1107/S1600577525005612
PMID:40815552
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12416416/
Abstract

The development of advanced catalysts for various electrochemical reactions necessitates precise characterization of their structure and dynamic evolution. This study introduces an innovative electrochemical cell tailored for operando X-ray characterizations, including X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS). The cell features an adjustable aqueous electrolyte window to reduce X-ray signal absorption and an integrated flow system for efficient removal of gas products. This design enables simultaneous XRD and XAFS measurements in both fluorescence and transmission modes. Using LiCoO as a model oxygen evolution reaction catalyst, operando measurements reveal structural transformations during the reaction. This device will aid in the exploration of catalyst mechanisms and the development of high-performance catalysts.

摘要

开发用于各种电化学反应的先进催化剂需要精确表征其结构和动态演变。本研究介绍了一种专为原位X射线表征而设计的创新型电化学电池，包括X射线衍射（XRD）和X射线吸收精细结构（XAFS）。该电池具有可调节的水性电解质窗口，以减少X射线信号吸收，并集成了用于有效去除气体产物的流动系统。这种设计能够在荧光和透射模式下同时进行XRD和XAFS测量。以LiCoO作为析氧反应催化剂的原位测量揭示了反应过程中的结构转变。该装置将有助于探索催化剂机理和开发高性能催化剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/d72f120f5da8/s-32-01272-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/f134020b765a/s-32-01272-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/07e8a45b678d/s-32-01272-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/e3e4a51b60cd/s-32-01272-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/c12260db901c/s-32-01272-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/059752326117/s-32-01272-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/d72f120f5da8/s-32-01272-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/f134020b765a/s-32-01272-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/07e8a45b678d/s-32-01272-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/e3e4a51b60cd/s-32-01272-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/c12260db901c/s-32-01272-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/059752326117/s-32-01272-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a241/12416416/d72f120f5da8/s-32-01272-fig6.jpg

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A novel electrochemical flow-cell for XAS investigations in X-ray opaque supports.一种用于在X射线不透明载体中进行X射线吸收光谱（XAS）研究的新型电化学流通池。
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