期刊
CATALYSIS TODAY
卷 183, 期 1, 页码 124-129出版社
ELSEVIER
DOI: 10.1016/j.cattod.2011.08.046
关键词
Metallic nanoparticles; Magnetic support; Impregnation; Hydrogenation; Recycling
资金
- Region Bretagne
- Universite Europeenne de Bretagne
- international cooperation programs PICS Brazil-France [490678/2008-4, 3637/2007-2010]
- CAPES-COFECUB [965/09, Ph695/10]
- CNPq
- FAPESP
Wet impregnation of pre-synthesized surfactant-stabilized aqueous rhodium (0) colloidal suspension on silica was employed in order to prepare supported Rh-0 nanoparticles of well-defined composition, morphology and size. A magnetic core-shell support of silica (Fe(3)O4@SiO2) was used to increase the handling properties of the obtained nanoheterogeneous catalyst. The nanocomposite catalyst Fe3O4@SiO2-Rh-0 NPs was highly active in the solventless hydrogenation of model olefins and aromatic substrates under mild conditions with turnover frequencies up to 143,000 h(-1). The catalyst was characterized by various transmission electron microscopy techniques showing well-dispersed rhodium nanoparticles (similar to 3 nm) mainly located at the periphery of the silica coating. The heterogeneous magnetite-supported nanocatalyst was investigated in the hydrogenation of cyclohexene and compared to the previous surfactant-stabilized aqueous Rh-0 colloidal suspension and various silica-supported Rh-0 nanoparticles. Finally, the composite catalyst could be reused in several runs after magnetic separation. (C) 2011 Elsevier B. V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据