Chemoselective hydrogenation catalysts: Pt on mesostructured CeO2 nanoparticles embedded within ultrathin layers of SiO2 binder

Patricia Concepción; Avelino Corma; Joaquín Silvestre-Albero; Victor Franco; Jean Y Chane-Ching

doi:10.1021/ja031768x

Chemoselective hydrogenation catalysts: Pt on mesostructured CeO2 nanoparticles embedded within ultrathin layers of SiO2 binder

J Am Chem Soc. 2004 May 5;126(17):5523-32. doi: 10.1021/ja031768x.

Authors

Patricia Concepción¹, Avelino Corma, Joaquín Silvestre-Albero, Victor Franco, Jean Y Chane-Ching

Affiliation

¹ Instituto de Tecnología Química, UPV-CSIC, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia, Spain.

PMID: 15113224
DOI: 10.1021/ja031768x

Abstract

Pt on mesostructured CeO(2) nanoparticles embedded within ultrathin layers of highly structured SiO(2) binder shows highest activity reported with 80% selectivity for the chemoselective hydrogenation of crotonaldehyde. Characterization by transmission electron microscopy (TEM), CO adsorption, and X-ray photoelectron spectroscopy (XPS) show the presence of small Pt metal particles, preferentially located on CeO(2) (70%) together with the formation of Pt-CeO(2-x) sites at the interface between Pt and CeO(2) (4 nm) nanoparticles. These sites are able to polarize the carbonyl group and facilitate the selective hydrogenation of this with respect to the double bond.