Tailored Electrochemical Synthesis of 2D-Hexagonal, Lamellar, and Cage-Type Mesostructured Pt Thin Films with Extralarge Periodicity

被引：63

作者：

Takai, Azusa ^{[1
]}

Yamauchi, Yusuke ^{[1
,2
,3
]}

Kuroda, Kazuyuki ^{[1
]}

机构：

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

[2] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton MANA, WPI, Tsukuba, Ibaraki 3050044, Japan

[3] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 01期

基金：

日本学术振兴会;

关键词：

MESOPOROUS MOLECULAR-SIEVES; PLATINUM; SILICA; DEPOSITION; PHASE; NANOPARTICLES; SURFACTANTS; TEMPLATES; DESIGN; SYSTEM;

D O I：

10.1021/ja9062844

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 nm(2) region proved by the lattice fringes of Pt extending over several nanoparticles.

引用

页码：208 / 214

页数：7

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