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

被引：56

作者：

Yamauchi, Y

Momma, T

Fuziwara, M

Nair, SS

Ohsuna, T

Terasaki, O

Osaka, T

Kuroda, K

机构：

[1] Waseda Univ, Fac Sci & Engn, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan

[2] Waseda Univ, Fac Sci & Engn, Major Nanosci & Nanoengn, Shinjuku Ku, Tokyo 1698555, Japan

[3] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 1690051, Japan

[4] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320021, Japan

[5] Stockholm Univ, Arrhenius Lab, Dept Struct Chem, S-10691 Stockholm, Sweden

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 25期

关键词：

D O I：

10.1021/cm051844q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：6342 / 6348

页数：7

共 58 条

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