反应条件下气固非均相催化的原位表征技术进展

IF 4.5 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Chunli Ai, Zeyu Jiang, Fan Dang, Chi Ma, Dong Guo, Yuying Shao, Jialei Wan, Chi He
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引用次数: 0

摘要

多相催化是化工过程的基础,气固催化广泛应用于化工生产、能源转化、环境保护等领域。要在这些过程中达到高效率,催化剂必须表现出特殊的活性、选择性和稳定性,通常使用纳米结构的金属催化剂来实现。非均相金属催化剂中活性位点的不断增加给准确识别真正的活性位点带来了很大的障碍。原位和操作性表征技术的出现澄清了活性位点动态变化的知识,为合理设计催化剂提供了大量的科学信息。本文综述了近年来在多相催化剂催化转化活性区域的原位/操作多方法的研究进展。我们全面概述了各种光学和x射线光谱技术的适用性,包括透射电子显微镜、拉曼光谱、紫外可见光谱、傅立叶变换红外光谱、x射线衍射、x射线光电子能谱和x射线吸收光谱,在识别活性位点和阐明多相催化反应过程中的作用。讨论包括在反应过程中识别活性位点演变的问题和未来观点,以及原位和operando表征方法的进展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Advances for in situ characterization techniques applied to gas-solid heterogeneous catalysis under reaction conditions

Heterogeneous catalysis is fundamental to chemical processes, with gas-solid catalysis extensively employed in chemical production, energy conversion, and environmental protection. Attaining high efficiency in these processes necessitates catalysts exhibiting exceptional activity, selectivity, and stability, frequently accomplished using nanostructured metal catalysts. The continuous growth of active sites in heterogeneous metal catalysts presents a considerable obstacle for the precise identification of the genuine active sites. The emergence of in situ and operando characterization techniques has clarified the knowledge of dynamic alterations in active sites, offering substantial scientific information to underpin the rational design of catalysts. This review summarizes recent progress in the development of diverse situ/operando approaches for identifying active regions in catalytic conversion over heterogeneous catalysts. We comprehensively outline the applicability of diverse optical and X-ray spectroscopic techniques, including transmission electron microscopy, Raman spectroscopy, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy, in identifying active sites and elucidating reaction processes in heterogeneous catalysis. The discussion encompasses issues and future views on the identification of active sites evolution during the reaction process, as well as the advancement of in situ and operando characterization approaches.

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来源期刊
CiteScore
7.60
自引率
6.70%
发文量
868
审稿时长
1 months
期刊介绍: Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.
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