Aerobic oxidation of cyclohexane catalyzed by size-controlled au clusters on hydroxyapatite: Size effect in the sub-2 nm regime

Yongmei Liu, Hironori Tsunoyama, Tomoki Akita, Songhai Xie, Tatsuya Tsukuda

Research output: Contribution to journalArticle

296 Citations (Scopus)

Abstract

In this work, we synthesized gold clusters, Aun (n = 10, 18, 25, 39), with atomically controlled sizes on hydroxyapatite (HAP) and studied the catalysis for aerobic oxidation of cyclohexane. These Aun/HAP catalysts could efficiently oxidize cyclohexane to cyclohexanol and cyclohexanone. The turnover frequency monotonically increased with an increase in the size, reaching values as high as 18 500 h-1 Au atom -1 at n = 39, and thereafter decreased with a further increase in n up to n ∼ 85. This finding provides a fundamental insight into size-specific catalysis of gold in the cluster regime (diameter < 2 nm) and a guiding principle for rational design of Au cluster-based catalysts.

Original languageEnglish
Pages (from-to)2-6
Number of pages5
JournalACS Catalysis
Volume1
Issue number1
DOIs
Publication statusPublished - 2011 Jan 7
Externally publishedYes

Keywords

  • Au clusters
  • aerobic oxidation
  • hydroxiapatite
  • size effect

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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