Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 266, Issue 1-2, Pages 221-225Publisher
ELSEVIER
DOI: 10.1016/j.molcata.2006.11.004
Keywords
hydrogenation; dehalogenation; colloids; rhodium; palladium
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The original palladium colloidal suspensions with an average size of 2.7 nm have been synthesised by reducing Na2PdCl4 with sodium borohydride and were stabilized by water soluble N,N-dimethyl-N-cetyl-N-(2-hydroxyethyl)ammonium chloride salt. The catalytic hydrogenation and dehalogenation of various halogenoarenes have been investigated with this aqueous suspension of palladium nanoparticles and compared with the well-known rhodium suspension. The influences of the halogen fragment and the experimental conditions have also been studied. It was observed that the kinetics and selectivity of the competitive dehalogenation/hydrogenation depend on the nature of metal colloids and the hydrogen pressure. (c) 2006 Elsevier B.V. All rights reserved.
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