Metal–Ligand Core–Shell Nanocomposite Catalysts for the Selective Semihydrogenation of Alkynes

Authors

  • Dr. Takato Mitsudome,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • Yusuke Takahashi,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • Dr. Satoshi Ichikawa,

    1. Institute for NanoScience Design Center, Osaka University, Toyonaka, Osaka 560-8531 (Japan)
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  • Dr. Tomoo Mizugaki,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • Prof. Dr. Koichiro Jitsukawa,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • Prof. Dr. Kiyotomi Kaneda

    Corresponding author
    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
    2. Research Center for Solar Energy Chemistry Osaka University, 1-3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
    • Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • This work was supported by the Japan Society for the Promotion of Science (JSPS) through a Grant-in-Aid for Young Scientists (A) (23686116). We thank Dr. Uruga, Dr. Tanida, Dr. Nitta, Dr. Taniguchi, and Dr. Hirayama (SPring-8) for XAFS measurements. T.M. thanks the JGC-S Scholarship Foundation.

Abstract

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Catalysts with a sheltered upbringing: Novel core–shell nanocomposite catalysts consisting of active metal nanoparticles encapsulated by macroligands have been prepared. They have Pd nanoparticles (PdNPs) as an active core and shell ligands having sulfoxide moieties coordinated to the PdNPs. The shell protects the catalyst from coordination by alkenes and allows the lead-free selective semihydrogenation of a wide range of alkynes without any additives (see scheme).

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