A comprehensive study on the effect of preparation methods for Au-core@shell silica materials in room temperature oxidative amide formation
Lam, Frank L.Y.
|Source||Journal of Materials Chemistry A , v. 3, (2), January 2015, p. 789-796|
|Summary||Core-shell silica comprising mesoporous SiO2 shell and solid SiO2 core (SiO2@mSiO(2)) was utilized as catalytic support to prepare highly active and efficient Au-SiO2@mSiO(2) catalysts for room temperature catalysis. Results showed that the mesoporous shell significantly contributed to the high surface area of SiO2@mSiO(2). Au nanocatalysts prepared by different methods (impregnation, IM and deposition-precipitation-DP) exhibited remarkably different structural properties. Au-SiO2@mSiO(2) catalysts exhibited excellent catalytic activity and high stability. Conversion could reach ca. 54% in the amidation of benzaldehyde and morpholine, with a complete selectivity to the target amide product at room temperature.|
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