Gold nanoparticles supported on passivated silica: access to an efficient aerobic epoxidation catalyst and the intrinsic oxidation activity of gold

David Gajan; Kevin Guillois; Pierre Delichère; Jean-Marie Basset; Jean-Pierre Candy; Valérie Caps; Christophe Copéret; Anne Lesage; Lyndon Emsley

doi:10.1021/ja903730q

Gold nanoparticles supported on passivated silica: access to an efficient aerobic epoxidation catalyst and the intrinsic oxidation activity of gold

J Am Chem Soc. 2009 Oct 21;131(41):14667-9. doi: 10.1021/ja903730q.

Authors

David Gajan¹, Kevin Guillois, Pierre Delichère, Jean-Marie Basset, Jean-Pierre Candy, Valérie Caps, Christophe Copéret, Anne Lesage, Lyndon Emsley

Affiliation

¹ 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.

PMID: 19780552
DOI: 10.1021/ja903730q

Abstract

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.