A rational repeating template method for synthesis of 2 D hexagonally ordered mesoporous precious metals

Azusa Takai, Yoji Doi, Yusuke Yamauchi, Kazuyuki Kuroda

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A repeating template method is presented for the synthesis of mesoporous metals with 2D hexagonal mesostructures. First, a silica replica (i.e., silica nanorods arranged periodically) is prepared by using 2D hexagonally ordered mesoporous carbon as the template. After that, the obtained silica replica is used as the second template for the preparation of mesoporous ruthenium. After the ruthenium species are introduced into the silica replica, the ruthenium species are then reduced by a vapor-infiltration method by using the reducing agent dimethylamine borane. After the ruthenium deposition, the silica is chemically removed. Analysis by transmission and scanning electron microscopies, a nitrogen-adsorption-desorption isotherm, and small-angle X-ray scattering revealed that the mesoporous ruthenium had a 2D hexagonal mesostructure, although the mesostructural ordering is decreased compared to that of the original mesoporous carbon template. This method is widely applicable to other metal systems. By changing the metal species introduced into the silica replica, several mesoporous metals (palladium and platinum) can be synthesized. Ordered mesoporous ruthenium and palladium, which are not easily attainable by the soft-templating methods, can be prepared. This study has overcome the composition variation limitations of the soft-templating method. Can I take your order please? A repeating template method is presented for the synthesis of mesoporous metals with 2D hexagonal mesostructures. Ordered mesoporous ruthenium and palladium are not easily attainable by soft-template methods.

Original languageEnglish
Pages (from-to)881-887
Number of pages7
JournalChemistry - An Asian Journal
Volume6
Issue number3
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • carbon
  • mesoporous materials
  • palladium
  • ruthenium
  • silica

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry

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