Vapor infiltration of a reducing agent for facile synthesis of mesoporous Pt and Pt-based alloys and its application for the preparation of mesoporous Pt microrods in anodic porous membranes

Yusuke Yamauchi, Azusa Takai, Masaki Komatsu, Makoto Sawada, Tetsu Ohsuna, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    59 Citations (Scopus)

    Abstract

    Highly ordered mesoporous Pt and Pt-based alloy (Pt-Ru and Pt-Ni) microparticles were deposited from lyotropic liquid crystal (LLC) films containing corresponding metal species via vapor infiltration of a reducing agent of dimethylaminoborane (DMAB). The LLC films with 2D hexagonal symmetry were prepared on flat substrates from diluted surfactant solutions including water, nonionic surfactant, ethanol, and metal species by drop-coating. Low-angle XRD measurements and TEM observations proved that the deposited Pt and Pt-based alloy microparticles have 2D hexagonally ordered mesoporous structures. Moreover, EDS mapping of mesoporous Pt-Ru microparticles indicated that the constituent metals are well-distributed within the mesopore walls. Moreover, we effectively utilized the method to fabricate mesoporous Pt microrods with 100 nm in diameter by using a porous anodic alumina membrane (PAAM) as a hard template. The Pt microrods possess a highly porous nanostructure. Our method utilizing vapor infiltration of a reducing agent, unlike conventional electrochemical and chemical deposition methods, allows the facile preparation of mesoporous metal microparticles and microrods and should be widely applicable to the deposition of various metals and multicomponent alloys.

    Original languageEnglish
    Pages (from-to)1004-1011
    Number of pages8
    JournalChemistry of Materials
    Volume20
    Issue number3
    DOIs
    Publication statusPublished - 2008 Feb 12

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    Reducing Agents
    Reducing agents
    Infiltration
    Metals
    Vapors
    Membranes
    Liquid Crystals
    Liquid crystals
    Aluminum Oxide
    Nonionic surfactants
    Crystal symmetry
    Angle measurement
    Surface-Active Agents
    Energy dispersive spectroscopy
    Nanostructures
    Surface active agents
    Ethanol
    Alumina
    Transmission electron microscopy
    Coatings

    ASJC Scopus subject areas

    • Materials Chemistry
    • Materials Science(all)

    Cite this

    Vapor infiltration of a reducing agent for facile synthesis of mesoporous Pt and Pt-based alloys and its application for the preparation of mesoporous Pt microrods in anodic porous membranes. / Yamauchi, Yusuke; Takai, Azusa; Komatsu, Masaki; Sawada, Makoto; Ohsuna, Tetsu; Kuroda, Kazuyuki.

    In: Chemistry of Materials, Vol. 20, No. 3, 12.02.2008, p. 1004-1011.

    Research output: Contribution to journalArticle

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    AU - Komatsu, Masaki

    AU - Sawada, Makoto

    AU - Ohsuna, Tetsu

    AU - Kuroda, Kazuyuki

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