TEM and STEM Study of the Au Nano-Particles Supported on Cerium Oxides

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The structures of Au particles on CeO2 surfaces were observed by an analytical transmission electron microscopy (TEM) equipped with annular dark field scanning transmission electron microscopy (HAADF-STEM) systems. The Au/CeO2 model catalysts were prepared by using the poly-crystalline CeO2 substrates. The Au particles of 2-5 nm in diameter were deposited on the substrates. The preferential orientation relationship of (111)[1-10]Au//(111)[1-10]CeO2 was frequently observed in profile-view HRTEM images on CeO2 (111) surface. High resolution HAADF-STEM images were also obtained for Au-CeO2 interfaces. The position of atomic columns of Au and Ce at Au-CeO2 interface is directly investigated from HAADF-STEM images. The structure of the interfaces between Au particles and CeO2 (111), (100), (110) surfaces were discussed.

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Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

2362-2365

DOI:

10.4028/www.scientific.net/MSF.654-656.2362

Citation:

T. Akita et al., "TEM and STEM Study of the Au Nano-Particles Supported on Cerium Oxides", Materials Science Forum, Vols. 654-656, pp. 2362-2365, 2010

Online since:

June 2010

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$35.00

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