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Sensitization of TiO2 with Pt, Pd, and Au Clusters Protected by Mercapto- and Dimercaptosuccinic Acid

Authors

  • Dr. Nobuyuki Sakai,

    1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan), Fax: (+81) 3-5452-6338
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  • Takahiro Ikeda,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571 (Japan)
    2. CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
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  • Prof. Toshiharu Teranishi,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571 (Japan)
    2. CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
    3. Current address: Institute of Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
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  • Prof. Tetsu Tatsuma

    Corresponding author
    1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan), Fax: (+81) 3-5452-6338
    • Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan), Fax: (+81) 3-5452-6338
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Abstract

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Noble behavior: Pt, Pd, and Au clusters protected by mercapto- and dimercaptosuccinic acid serve as sensitizers for TiO2. Pt and Pd clusters give higher photocurrents than Au clusters, and the photocurrents are further improved by employing an electrolyte containing iodide ions as electron donors, in which Au clusters are corroded (see picture).

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