Preparation of ∼1 nm Gold Clusters Confined within Mesoporous Silica and Microwave-Assisted Catalytic Application for Alcohol Oxidation

Yongmei Liu, Hironori Tsunoyama, Tomoki Akita, Tatsuya Tsukuda

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

A simple, effective method has been demonstrated to immobilize ∼1 nm Au clusters within mesoporous silicas (SBA-15, MCF, HMS) using triphenylphosphine-protected Au11 (Au11:TPP) clusters as precursors, which were deposited on the silica surface in an organic medium. A unique feature of this method is the ability to disperse Au11:TPP homogeneously over a large surface area by optimizing the solvent-mediated interaction. The Au11:TPP-silica composite was then carefully calcined to remove the protecting ligands while suppressing the aggregation of the resulting Au clusters. For SBA-supported Au clusters, the absence of the surface plasmon band in the reflectance spectrum indicated that contamination by AuNPs larger than 2 nm was negligibly small. The Au cluster size supported on SBA was estimated to be 0.8 ± 0.3 nm by HAADF-STEM observations. The SBA-supported Au clusters exhibited catalytic activity for oxidation of various alcohols by H2O2 under microwave irradiation and were found to be reusable.

Original languageEnglish
Pages (from-to)13457-13461
Number of pages5
JournalJournal of Physical Chemistry C
Volume113
Issue number31
DOIs
Publication statusPublished - 2009 Aug 6
Externally publishedYes

Fingerprint

Silicon Dioxide
Gold
alcohols
Alcohols
Silica
Microwaves
gold
silicon dioxide
microwaves
Oxidation
preparation
oxidation
Microwave irradiation
Catalyst activity
Contamination
Agglomeration
Ligands
Composite materials
catalytic activity
contamination

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Preparation of ∼1 nm Gold Clusters Confined within Mesoporous Silica and Microwave-Assisted Catalytic Application for Alcohol Oxidation. / Liu, Yongmei; Tsunoyama, Hironori; Akita, Tomoki; Tsukuda, Tatsuya.

In: Journal of Physical Chemistry C, Vol. 113, No. 31, 06.08.2009, p. 13457-13461.

Research output: Contribution to journalArticle

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