Title

Oxidation of benzyl alcohol by using gold nanoparticles supported on ceria foam

RIS ID

105109

Publication Details

Alhumaimess, M., Lin, Z., Weng, W., Dimitratos, N., Dummer, N. F., Taylor, S. H., Bartley, J. K., Kiely, C. J. & Hutchings, G. J. (2012). Oxidation of benzyl alcohol by using gold nanoparticles supported on ceria foam. ChemSusChem: chemistry and sustainability, energy and materials, 5 (1), 125-131.

Abstract

The efficacy of using cerium oxide foams as a support for Au nanoparticles and subsequent use as oxidation catalysts have been investigated. These were synthesized using L-asparagine to produce a cerium coordination polymer foam, which was calcined to give the oxide foam. Au nanoparticles were supported on the CeO 2 foams using a sol-immobilization method. The activity of the Au/foamCeO 2 for solvent-free benzyl alcohol oxidation was superior to standard Au/CeO 2 catalysts, and the activity was found to be dependent on the crystallization time of the precursor foam. A crystallization time of 4 h was found to produce the most active catalyst, which retained activity and a high selectivity to benzaldehyde (ca. 96 %) when re-used and this is related to the structure of the material. The high activity is attributed to the greater lability of surface oxygen in the support compared with commercial CeO 2 materials. Tailored foam bed: Cerium oxide with a foam morphology is used as a support for gold nanoparticles. The foams are synthesized using L-asparagine to produce a cerium coordination polymer foam, which is calcined to give the oxide foam. The activity of the Au/foamCeO 2 for solvent-free benzyl alcohol oxidation is superior to standard Au/CeO 2 catalysts.

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/cssc.201100374