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

被引：148

作者：

Concepción, P

Corma, A

Silvestre-Albero, J

Franco, V

Chane-Ching, JY

机构：

[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain

[2] Rhone Poulenc Rech, F-93308 Aubervilliers, France

[3] Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Spain

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 17期

关键词：

D O I：

10.1021/ja031768x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pt on mesostructured CeO2 nanoparticles embedded within ultrathin layers of highly structured SiO2 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 CeO2 (70%) together with the formation of Pt-CeO2-x, sites at the interface between Pt and CeO2 (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.

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页码：5523 / 5532

页数：10

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