HAADF STEM observation of the Au/CeO2 nanostructures

Yong Chen, Yue Chen, Changjun Qiu, Chunlin Chen, Zhongchang Wang

    研究成果: Article査読

    5 被引用数 (Scopus)

    抄録

    Gold nanoparticles supported on oxide substrates are widely utilized as heterogeneous catalysts. Here, we apply a facile surfactant- and template-free hydrothermal method to fabricate Au/CeO2 nanostructures, and show a successful preparation of well-defined CeO2 nano-octahedrons with Au nanoparticles on their surface. The high-angle annular dark field scanning transmission microscopy imaging technique is applied to investigate microstructure of the Au/CeO2 nanostructure. We find that the Au clusters with a diameter of less than 2 nm cannot form the FCC Au lattice, and that twins emerge in the Au nanoparticles with a diameter of larger than 2 nm. Moreover, we identify preferential orientation relationships {111}Au∥{111}CeO2 and ∥110∥Au∥110∥CeO2 between the Au nanoparticles and CeO2 nano-octahedrons.

    本文言語English
    ページ(範囲)31-34
    ページ数4
    ジャーナルMaterials Letters
    141
    DOI
    出版ステータスPublished - 2015 2月 15

    ASJC Scopus subject areas

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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