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 language | English |
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Pages (from-to) | 2-6 |
Number of pages | 5 |
Journal | ACS Catalysis |
Volume | 1 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 Jan 7 |
Externally published | Yes |
Keywords
- Au clusters
- aerobic oxidation
- hydroxiapatite
- size effect
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)