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  • Title: TEM observations of Au and Ir particles supported on CeO2.
    Author: Akita T, Okumura M, Tanaka K, Kohyama M, Tsubota S, Haruta M.
    Journal: J Electron Microsc (Tokyo); 2005; 54 Suppl 1():i81-5. PubMed ID: 16157648.
    Abstract:
    Au/CeO2 and Ir/CeO2 catalysts were observed by a transmission electron microscope in order to investigate the nano-structures of Au and Ir particles and CeO2 grains and the interface structure between metallic particles and CeO2. An annular dark field scanning transmission electron microscope (ADF-STEM) and an energy dispersive X-ray spectroscopy (EDS) revealed that the metallic particles smaller than 2 nm in diameter are highly dispersed on CeO2 supports in both catalysts. For model samples of larger CeO2 particles with flat facets of low-index surfaces, high resolution transmission electron microscopy observations of Au/CeO2 and Ir/CeO2 interfaces were made and the epitaxial relationship between Au and CeO2, (111)[110]Au//(111)[110]CeO2 has been found for the first time.
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