原位透射电镜技术在纳米催化剂设计中的应用进展  

Application of in Situ Transmission Electron Microscopy Technology in the Design of Nanocatalysts

作　　者：李春曦 郭晓云 吴哲敏 袁文涛 LI Chunxi;GUO Xiaoyun;WU Zhemin;YUAN Wentao(Center of Electron Microscopy,Zhejiang University,Hangzhou 310027;State Key Laboratory of Silicon and Advanced Semiconductor Materials,Zhejiang University,Hangzhou 310027;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027)

机构地区：[1]浙江大学电子显微镜中心,杭州310027 [2]浙江大学,硅及先进半导体材料全国重点实验室,杭州310027 [3]浙江大学材料科学与工程学院,杭州310027

出　　处：《中国基础科学》2024年第2期49-55,62,共8页China Basic Science

基　　金：国家重点研发计划青年科学家项目(2022YFA1505500);国家自然科学基金项目(52171019);浙江省自然科学基金项目(Nos.LR23B030004)。

摘　　要：多相催化在现代工业中占据非常重要的地位。研究表明,纳米催化剂的微观结构在工况条件下会发生变化,并引起催化剂性能的相应改变。近年来原位透射电子显微学的发展为在原子尺度上理解反应过程中纳米催化剂的动态行为提供了机会。重点关注原位透射电镜在催化剂原子尺度原位动态研究中的应用,以一些代表性研究为例,介绍利用原位透射电镜技术在工况条件下对催化剂构效关系、失活机制、结构重构等方面的研究进展。Nanocatalysts play a very important role in modern industry.Recent studies suggested that the microstructure of nanocatalysts will change dynamically under the operating environments,resulting in the change of the catalytic performance.With the development of in situ transmission electron microscopy methodologies,researchers can systematically study the atomic scale dynamics of nanocatalysts under reaction conditions.This paper mainly focused on the recent application of in situ TEM in the study of atomic-scale in situ dynamics of catalysts,especially reviewed the recent progress of the structure-activity relationship,deactivation mechanism and structural reconstruction of catalysts under reaction conditions by taking some representative studies as examples.

关 键 词：原位透射电镜 纳米催化剂 结构演变 气氛环境 

分 类 号：O643[理学—物理化学]