Sintering mechanism and sintering-resistant strategies for metal-based catalyst

被引：0
|
作者：
Cao M. [1 ]
Mao Y. [1 ]
Wang Q. [1 ]
Li S. [1 ]
Yan X. [1 ]
机构：
[1] College of Chemical Engineering and Technology, Taiyuan University of Technology, Shanxi, Taiyuan
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 02期
关键词：
catalyst; deactivation; sintering; sintering-resistant strategies;
D O I：
10.16085/j.issn.1000-6613.2022-0688
中图分类号：
学科分类号：
摘要：
Metal-based catalysts suffer from sintering of metal particles at high temperature, which causes the decline of catalytic performance and even deactivation. Therefore, improving the thermal stability of metal-based catalysts becomes a critical challenge for heterogeneous catalysis. In this review, the two main sintering mechanisms for metal-based catalyst has elaborated, including particle migration and Ostwald ripening. Four approaches to determine the sintering mechanism by particle size distribution, particle growth kinetics, in situ transmission electron microscopy analysis, and experimental and computational prediction were established. Among them, temperature affects the kinetic energy of metal particle, which is the main physical factor for particle sintering, while chemical potential, as one of the chemical factors for particle sintering, is greatly affected by the metal-support interaction. In addition, we summarized the research progress in developing the sintering-resistant catalysts on the basis of metal-support interaction, spatial confinement and other novel structure strategies. Furthermore, the development and goal for the research and construction of sintering-resistant catalysts are proposed from the aspects of catalyst preparation, structure analysis and catalytic performance. © 2023 Chemical Industry Press. All rights reserved.
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页码：744 / 755
页数：11
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