Insights into Heterogeneous Catalysts under Reaction Conditions by In Situ/Operando Electron Microscopy

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Abstract
The advancement of clean energy and environment depends strongly on the development of efficient catalysts in a wide range of heterogeneous catalytic reactions, which has benefited from transmission electron microscopic techniques in determining the atomic‐scale morphologies and structures. However, it is the morphology and structure under the catalytic reaction conditions that determine the performance of the catalyst, which has captured a surge of interest in developing and applying in situ/operando transmission electron microscopic techniques in heterogeneous catalysis. The major theme of this review is to highlight some of the most recent insights into heterogeneous catalysts under the relevant reaction conditions using in situ/operando transmission electron microscopic techniques. Rather than a comprehensive overview of the basic principles of in situ/operando techniques, this review focuses on the insights into the atomic‐scale/nanoscale details of various catalysts ranging from single‐component to multicomponent catalysts under heterogeneous catalytic, electrocatalytic, and photocatalytic reaction conditions involving both gas–solid and liquid–solid interfaces. This focus is coupled with discussions of the correlation of the atomic, molecular, and nanoscale morphology, composition, and structure with the catalytic properties under the reaction conditions, shining light on the challenges and opportunities in design of nanostructured catalysts for clean and sustainable energy applications.
Funding Information
  • National Science Foundation (CHE 1566283, 2102482, IIP 1640669)
  • U.S. Department of Energy
  • Basic Energy Sciences (DE‐SC0006877)
  • National Natural Science Foundation of China (51725101, 11727807, 51672050, 61790581, 22088101)
  • Ministry of Science and Technology of the People's Republic of China (2018YFA0209102, 2021YFA1200600)

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