Investigation of the electronic interaction between TiO2(1 1 0) surfaces and Au clusters by PES and STM

Taketoshi Minato, Tomofumi Susaki, Susumu Shiraki, Hiroyuki S. Kato, Maki Kawai, Ken Ichi Aika

    研究成果: Conference article査読

    98 被引用数 (Scopus)

    抄録

    The electronic interaction between TiO2(110) surfaces and Au clusters has been investigated by photoelectron spectroscopy (PES) and scanning tunneling microscopy (STM) to elucidate the high catalytic activity of Au/TiO2. With increasing Au amount, the shift of O 2p nonbonding peak towards the Fermi level and the decrease in the Ti 3d peak area were precisely observed in the valence band PES spectra of Au/TiO2(110). These changes in the valence band structure are attributed to the electron transfer from the surface defects on TiO2(110) into the Au clusters. At the low coverage region, the STM images consistently show that the Au clusters nucleate at the surface defects of TiO2(110). Here, we discuss the electronic interaction between the Au clusters and the TiO2 surface relating to the catalytic activity of Au clusters on surfaces.

    本文言語English
    ページ(範囲)1012-1017
    ページ数6
    ジャーナルSurface Science
    566-568
    1-3 PART 2
    DOI
    出版ステータスPublished - 2004 9 20
    イベントProceedings of the 22nd European Conference on Surface Science - Prague, Czech Republic
    継続期間: 2003 9 72003 9 12

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

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