Exploration of Strong Metal-Support Interaction in Heterogeneous Catalysts by in situ Transmission Electron Microscopy

The phenomenon of strong metal-support interaction (SMSI) observed in supported metal catalysts, usually accompanied by the formation of the encapsulation layer on metal nanoparticles, has attracted extensive research attention due to its significance in heterogeneous catalysis. Notably, great progress has been made in recent years in investigating SMSI by in situ transmission electron microscopy (TEM), along with an enhanced comprehension of the underlying mechanisms governing SMSI formation. This emerging topic summarizes recent progress utilizing in situ TEM to study the interaction between metal and support and the relationship between the structure and performance of the supported catalyst under reaction conditions. A brief perspective about the use of in situ TEM for further study of SMSI is also presented, showing prospects in this field that will stimulate further upsurging research in promoting the catalytic efficiency of supported catalysts.