Abstract
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.
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