Activation of Dodecanethiol-Capped Gold Catalysts for CO Oxidation by Treatment with KMnO(4) or K(2)MnO(4)
Journal Article
·
· Catalysis Letters
OSTI ID:1044694
- ORNL
Dodecanethiol-protected gold nanoparticles were deposited onto fumed SiO{sub 2} (Cab-O-Sil) via colloidal deposition. The catalyst was treated with a strongly oxidative KMnO{sub 4} or K{sub 2}MnO{sub 4} solution. Low-temperature conversion in catalytic CO oxidation increased dramatically following the oxidative treatment and subsequent thermal activation at 300 C to burn off residual organic species. On the other hand, the treatment with Fenton's reagent did not lead to any positive effect. The influences of the average sizes of pre-synthesized gold particles (1.8, 2.1, 3.9, 9.9 nm) and the choice of different supports (SiO{sub 2}, TiO{sub 2}, C) were investigated, and relevant characterization using TG/DTG, XRD, TEM, EDX, and HAADF was conducted. The catalyst stability as a function of time on stream was also surveyed. This work establishes the beneficial effect of treating dodecanethiol-capped gold catalysts by KMnO{sub 4} or K{sub 2}MnO{sub 4}.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1044694
- Journal Information:
- Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 4 Vol. 136; ISSN CALEER; ISSN 1011-372X
- Country of Publication:
- United States
- Language:
- English
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