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Issue 47, 2007
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Supported ionic liquid phase rhodium nanoparticle hydrogenation catalysts

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Abstract

Rh(0) nanoparticles (ca. 4 nm) dispersed in an ionic liquid (1-n-butyl-3-methylimidazolium tetrafluoroborate) were immobilized within a silica network, prepared by the sol–gel method. The effect of the sol–gel catalyst (acid or base) on the encapsulated ionic liquid and Rh(0) content, on the silica morphology and texture, and on the catalyst alkene hydrogenation activity was investigated. The Rh(0) content in the resulting xerogels (ca. 0.1 wt% Rh/SiO2) was shown to be independent of the sol–gel process. However, acidic conditions afforded higher contents of encapsulated ionic liquid and xerogels with larger pore diameters, which in turn might be responsible for the higher catalyst activity in hydrogenation of the alkenes.

Graphical abstract: Supported ionic liquid phase rhodium nanoparticle hydrogenation catalysts

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Publication details

The article was received on 29 May 2007, accepted on 25 Jul 2007 and first published on 09 Aug 2007


Article type: Paper
DOI: 10.1039/B708111A
Citation: Dalton Trans., 2007,0, 5549-5553
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    Supported ionic liquid phase rhodium nanoparticle hydrogenation catalysts

    M. A. Gelesky, S. S. X. Chiaro, F. A. Pavan, J. H. Z. dos Santos and J. Dupont, Dalton Trans., 2007, 0, 5549
    DOI: 10.1039/B708111A

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