Effect of particle size on selective hydrogenation of cinnamaldehyde by Pt encapsulated in mesoporous silica

被引：46

作者：

Prashar, Atul K. ^{[1
]}

Mayadevi, S. ^{[2
]}

Devi, R. Nandini ^{[1
]}

机构：

[1] Natl Chem Lab, Catalysis & Inorgan Chem Div, Pune 411008, Maharashtra, India

[2] Natl Chem Lab, Chem Engn & Proc Dev Div, Pune 411008, Maharashtra, India

来源：

CATALYSIS COMMUNICATIONS | 2012年 / 28卷

关键词：

Cinnamaldehyde hydrogenation; Selective hydrogenation; alpha; beta-Unsaturated aldehydes; Mesoporous silica; Pt nanoparticles; Kinetic analysis; NANOPARTICLES; ADSORPTION; SURFACES;

D O I：

10.1016/j.catcom.2012.08.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pt nanoparticles of various sizes, viz. 8. 4.9, 3.6 and 1.8 nm were encapsulated in 2D hexagonal mesoporous silica by in-situ synthesis as well as post synthetic modifications so that the final catalyst composition was <= 1 wt.% Pt/SiO2. A kinetic analysis of the effect of particle size on selective hydrogenation of cinnamaldehyde was carried out on these catalysts. It was found that the materials, even at such low loading of Pt, were very active for the hydrogenation and selective for the desired product, cinnamyl alcohol. Among the different particle sizes, selectivity was found to be the highest on 8 nm particles. Kinetic analysis shows that the reaction follows a consecutive reaction pathway. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：42 / 46

页数：5

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