Tailored electrochemical synthesis of 2D-hexagonal, lamellar, and cage-type mesostructured Pt thin films with extralarge periodicity

Azusa Takai, Yusuke Yamauchi, Kazuyuki Kuroda

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    54 Citations (Scopus)

    Abstract

    We report the synthesis of mesostructured Pt films with extralarge periodicity from lyotropic liquid crystals consisting of block copolymers (polystyrene-b-polyethylene oxide, PS-b-PEO) on Au substrates by electrochemical deposition. The Pt films with three types of (two-dimensional (2D)-hexagonal, lamellar, and cage-type) mesostructures are successfully synthesized by controlling the compositional ratio between block copolymers and Pt species in precursor solutions. The mesostructured Pt films have high electrochemically active surface areas. The bumpy mesopore surfaces, which reflect the mesopore walls consisting of connected nanoparticles, greatly contribute to the enhancement of the surface areas. The mesopore walls have single crystal domains over 400 nm2 region proved by the lattice fringes of Pt extending over several nanoparticles.

    Original languageEnglish
    Pages (from-to)208-214
    Number of pages7
    JournalJournal of the American Chemical Society
    Volume132
    Issue number1
    DOIs
    Publication statusPublished - 2010 Jan 13

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    ASJC Scopus subject areas

    • Chemistry(all)
    • Catalysis
    • Biochemistry
    • Colloid and Surface Chemistry

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