A Highly Efficient Mononuclear Iridium Complex Photocatalyst for CO2 Reduction under Visible Light

Authors

  • Dr. Shunsuke Sato,

    Corresponding author
    1. Toyota Central Research and Development Laboratories, Inc. Nagakute, Aichi 480-1192 (Japan)
    2. Precursory Research for Embryonic Science and Technology (PRESTO) (Japan) Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
    • Toyota Central Research and Development Laboratories, Inc. Nagakute, Aichi 480-1192 (Japan)
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  • Dr. Takeshi Morikawa,

    1. Toyota Central Research and Development Laboratories, Inc. Nagakute, Aichi 480-1192 (Japan)
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  • Dr. Tsutomu Kajino,

    1. Toyota Central Research and Development Laboratories, Inc. Nagakute, Aichi 480-1192 (Japan)
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  • Prof. Osamu Ishitani

    1. Department of Chemistry, and Department of Chemistry and Materials Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1, E1-9, Meguro-ku, Tokyo 152-8551 (Japan)
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  • This study was partially supported by the Precursory Research for Embryonic Science and Technology (PRESTO). The authors would like to thank, M. Yamamoto and A. Ohshima for their experimental support.

Abstract

original image

Mononuclear iridium(III) terpyridine (tpy) 2-phenylpyridine (ppy) complexes [Ir(tpy)(R-ppy)Cl] (R=H, Me, CF3) can act as efficient and selective CO2 reduction photocatalysts. The reaction is driven using visible light in a homogeneous solution, and even in a H2O mixed solution. The most efficient photocatalyst is [Ir(tpy)(Me-ppy)Cl], for which the turnover in CO was over 50 and the quantum yield was 0.21 at 480 nm.

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