Oxidation of benzyl alcohol by using gold nanoparticles supported on ceria foam
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.
Please refer to publisher version or contact your library.