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High Resolution Transmission Electron Microscopy of Some Catalysts

Application of high resolution electron microscopy (HREM) to the study of Pt-Sn/γ-Al2O3 supported catalyst, zeolites, iron catalyst for ammonia synthesis, rare-earth oxide catalysts, etc., is described. Micro-twins, dislocations and other crystallographic imperfections are observed. Moreover, the structure images of channels representing columns of cages in several kinds of zeolites as well as radiation damage processes in them have been recorded in situ. The observed images of zeolites were found to be in good agreement with the structure model projections and computer simulated images.