Efficient Aerobic Oxidation of Alcohols using a Hydrotalcite-Supported Gold Nanoparticle Catalyst

Authors

  • Takato Mitsudome,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan, Fax: (+81)-6-6850-6260; phone: (+81)-6-6850-6260
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  • Akifumi Noujima,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan, Fax: (+81)-6-6850-6260; phone: (+81)-6-6850-6260
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  • Tomoo Mizugaki,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan, Fax: (+81)-6-6850-6260; phone: (+81)-6-6850-6260
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  • Koichiro Jitsukawa,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan, Fax: (+81)-6-6850-6260; phone: (+81)-6-6850-6260
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  • Kiyotomi Kaneda

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan, Fax: (+81)-6-6850-6260; phone: (+81)-6-6850-6260
    2. Research Center for Solar Energy Chemistry, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
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Abstract

Hydrotalcite-supported gold nanoparticles (Au/HT) were found to be a highly efficient heterogeneous catalyst for the aerobic oxidation of alcohols under mild reaction conditions (40 °C, in air). This catalyst system does not require any additives and is applicable to a wide range of alcohols, including less reactive cyclohexanol derivatives. This Au/HT catalyst could also function in the oxidation of 1-phenylethanol under neat conditions; the turnover number (TON) and turnover frequency (TOF) reached 200,000 and 8,300 h−1, respectively. These values are among the highest values compared to those of other reported catalyst systems at high conversion. Moreover, the Au/HT can be recovered by simple filtration and reused without any loss of its activity and selectivity.

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