High catalytic activity for CO oxidation of gold nanoparticles confined in acidic support Al-SBA-15 at low temperatures

Chia Wen Chiang, Aiqin Wang, Ben Zu Wan, Chung Yuan Mou

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

While there is a large number of recent studies of Au nanocatalysts supported on metal oxides, low-temperature CO oxidation under an acidic environment has not yet been accomplished. Over a novel acidic Al-SBA-15 support, uniformly distributed gold nanoparticles with sizes ∼2.7 nm were obtained by a successive procedure of aminosilane grafting, gold adsorption-reduction, and then high-temperature hydrogen treatment. The catalyst system, Au@Al-SBA-15, exhibits extraordinarily high activity for CO oxidation at 80°C. By varying the Si/Al ratio of the support, the dependence of the catalytic activity on the support Si/Al ratio was found in the CO oxidation reaction.

Original languageEnglish
Pages (from-to)18042-18047
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number38
DOIs
Publication statusPublished - Sep 29 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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