Unique microstructure of mesoporous Pt (Hi-Pt) prepared via direct physical casting in lyotropic liquid crystalline media

Yusuke Yamauchi, Toshiyuki Momma, Minekazu Fuziwara, Sivakumar Sadasivan Nair, Tetsu Ohsuna, Osamu Terasaki, Tetsuya Osaka, Kazuyuki Kuroda

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Two-dimensional hexagonally ordered mesoporous Pt particles are prepared by Pt deposition in the aqueous domains of lyotropic liquid crystals (LLC) by chemical reduction with Zn powders. Interestingly, the framework is composed of connected nanoparticles of about 3 nm in size. Moreover, it is proved that the lattice fringes on the atomic crystallinity are coherently extended across the several nanoparticles in the framework. Such a framework composed of connected nanoparticles with extended crystallinity is uniquely created by using LLC as a soft template, which is not attainable by a traditional approach using mesoporous silica as a hard template. Through the structural identification, the formation mechanism of mesoporous Pt in the presence of LLC is thought to be continuous deposition of Pt nanoparticles from one nanoparticle.

Original languageEnglish
Pages (from-to)6342-6348
Number of pages7
JournalChemistry of Materials
Issue number25
Publication statusPublished - 2005 Dec 13


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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