Gold clusters supported on alkaline treated TS-1 for highly efficient propene epoxidation with O2 and H2

Gold could be deposited as clusters smaller than 2.0nm in diameter on TS-1 by solid grinding (SG) of the support with dimethyl Au(III) acetylacetonate after TS-1 was pretreated in aqueous solution of alkaline metal hydroxides. While in C3H6 epoxidation with O2 and H2 mixture Au nanoparticles larger...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2010-04, Vol.95 (3-4), p.430-438
Main Authors: Huang, Jiahui, Takei, Takashi, Akita, Tomoki, Ohashi, Hironori, Haruta, Masatake
Format: Article
Language:English
Subjects:
Alkaline treatment
Catalysis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold cluster
H2 efficiency
O2/H2 mixture
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Propene epoxidation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
TS-1
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Summary:Gold could be deposited as clusters smaller than 2.0nm in diameter on TS-1 by solid grinding (SG) of the support with dimethyl Au(III) acetylacetonate after TS-1 was pretreated in aqueous solution of alkaline metal hydroxides. While in C3H6 epoxidation with O2 and H2 mixture Au nanoparticles larger than 2.0nm deposited on TS-1 without alkaline treatment gave a very low PO formation rate of 11gPOkgcat.−1h−1, Au clusters on alkaline treated TS-1 presented a greatly enhanced rate as high as 137gPOkgcat.−1h−1, which was comparable to the best data reported so far. In addition, very high H2 efficiency reaching 47% could be obtained by gold clusters on alkaline treated TS-1.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2010.01.023