Gold nanoparticles supported on passivated silica: access to an efficient aerobic epoxidation catalyst and the intrinsic oxidation activity of gold.
Well-defined and perfectly dispersed [( identical withSiO)Au(I)] surface species supported on silica have been obtained via surface organometallic chemistry and transformed upon mild reduction (H(2), 300 degrees C) into small (1.8 +/- 0.6 nm) Au particles supported on silica passivated with SiMe(3) functionalities. Improved performance in liquid-phase aerobic epoxidation has been achieved, and the intrinsic activity of gold in oxidation is revealed.
Gajan
David
D
Universite de Lyon, Institut de Chimie de Lyon, C2P2-LCOMS UMR 5265 (CNRS - CPE - Universite Lyon 1), ESCPE Lyon, 43, Bd. du 11 Novembre, F-69616 Villeurbanne, France.
Guillois
Kevin
K
Delichère
Pierre
P
Basset
Jean-Marie
JM
Candy
Jean-Pierre
JP
Caps
Valérie
V
Copéret
Christophe
C
Lesage
Anne
A
Emsley
Lyndon
L