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Issue 11, 2006
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Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

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Abstract

Metal complexes of polydimethylsiloxane-derived ligands can be adsorbed onto silica and subsequently reduced in-situ in supercritical CO2 (scCO2) to generate metal nanoparticles. Pd nanoparticles on silica, generated during C–C coupling reactions in scCO2, can be recycled several times without any loss in activity. Focusing on Heck and Suzuki coupling reactions, the products showed no contamination of the organic products with Pd using quantitative ICP emission spectroscopy. The use of scCO2 prevents the desorption of the Pd nanoparticles from their support. Build-up of ammonium salts as by-products in these coupling reactions leads to reduced activity for these heterogeneous catalysts after four runs.

Graphical abstract: Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

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Publication details

The article was received on 19 May 2006, accepted on 18 Jul 2006 and first published on 14 Aug 2006


Article type: Paper
DOI: 10.1039/B607118J
Citation: Green Chem., 2006,8, 965-971
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    Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

    S. Saffarzadeh-Matin, F. M. Kerton, J. M. Lynam and C. M. Rayner, Green Chem., 2006, 8, 965
    DOI: 10.1039/B607118J

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