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Advanced Materials

Molecular Catalysts Confined on and Within Molecular Layers Formed on a Si(111) Surface with Direct Si–C Bonds

Authors

  • Takuya Masuda,

    1. Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
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  • Hitoshi Fukumitsu,

    1. Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
    2. Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
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  • Satoru Takakusagi,

    1. Catalysis Research Center, Hokkaido University, Sapporo 001-0021, Japan
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  • Wang-Jae Chun,

    1. Chemistry Department, International Christian University, Mitaka 181-8585, Tokyo, Japan
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  • Toshihiro Kondo,

    1. Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1, Ohtsuka, Bunkyo-ku, Tokyo 112-8610, Japan
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  • Kiyotaka Asakura,

    1. Catalysis Research Center, Hokkaido University, Sapporo 001-0021, Japan
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  • Kohei Uosaki

    Corresponding author
    1. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
    2. Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
    3. Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.
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Abstract

Two examples of confined molecular catalysts are presented. PtCl42− complexes are attached to a thiol-terminated monolayer by ligand exchange of Cl with a thiolate group and incorporated in a multilayer of viologen moieties by ion exchange. All Cl ligands are replaced by OH or H2O before HER takes place. Ex situ and in situ XAFS measurements confirm that the Pt complexes accelerate HER without being converted into Pt particles.

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