Aerobic oxidative esterification of benzyl alcohol and acetaldehyde over gold supported on nanostructured ceria-alumina mixed oxides

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Smolentseva E, Costa VV, Cotta RF, Simakova O, Beloshapkin S, Gusevskaya EV, Simakov A
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 2015
Journal: ChemCatChem
Journal acronym: CHEMCATCHEM
Volume number: 7
Issue number: 6
Start page: 1011
End page: 1017
Number of pages: 7
ISSN: 1867-3880
eISSN: 1867-3899


Abstract

Au nanoparticles supported on nanostructured ceria-alumina mixed oxides (10 and 30wt% ceria) were prepared by a deposition-precipitation method. Their properties were studied by N-2 adsorption, XRD, TEM, X-ray photoelectron spectroscopy, and UV/Vis spectroscopy under temperature-programmed reduction or oxidation. The materials catalyzed the liquid-phase aerobic oxidative esterification of benzyl alcohol and benzaldehyde effectively and showed a much better performance than Au supported on the individual oxides. The reactions occurred with high turnover numbers (up to 19000) in methanol solutions in the absence of any auxiliary base and gave mainly methyl benzoate. The strong synergetic effect of ceria and alumina can be explained by the enhanced oxygen storage capacity of the materials prepared from mixed oxides compared to that of pure alumina and ceria. The order of the catalytic activity (Au/Al2O32


Keywords

alcohols, gold, oxidation, supported catalysts

Last updated on 2019-17-11 at 03:28