Synthesis of mesoporous Pt films with tunable pore sizes from aqueous surfactant solutions

Hongjing Wang, Liang Wang, Takaaki Sato, Yasuhiro Sakamoto, Satoshi Tominaka, Keiichi Miyasaka, Nobuyoshi Miyamoto, Yoshihiro Nemoto, Osamu Terasaki, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)

Abstract

Platinum (Pt) is widely used as battery electrodes, catalysts for chemicals, and catalysts for exhaust gas decomposition in industries. Increasing need and very limited supply of rare Pt is a serious problem in the world. Here, we propose new synthetic way for reducing the use of Pt in a catalytic system by increasing the surface area and modifying the Pt surface structure. Several types of mesoporous Pt films with different pore sizes ranging from 5 to 30 nm are prepared by electrochemical plating in aqueous surfactant solutions. The mesopore walls are composed of connected Pt nanoparticles with around 3 nm in diameter. The Pt atomic crystallinity is coherently extending across over several Pt nanoparticles, showing a large number of atomic steps, which can accelerate methanol oxidation reaction. As a result of a high surface area and unique Pt surface, our mesoporous Pt film exhibits high potentiality as a superior electrocatalyst.

Original languageEnglish
Pages (from-to)1591-1598
Number of pages8
JournalChemistry of Materials
Volume24
Issue number9
DOIs
Publication statusPublished - 2012 May 8
Externally publishedYes

Keywords

  • Pt
  • electrochemical deposition
  • mesoporous film
  • mesoporous material
  • surfactant assembly

ASJC Scopus subject areas

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

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