Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
68000 | Journal of Molecular Catalysis A: Chemical | 2007 | 5 Pages |
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.
Graphical abstractThe present work describes the synthesis of the surfactant-stabilized aqueous palladium nanoparticle suspension. The catalytic hydrogenation and dehalogenation of various halogenoarenes have been investigated with Pd and Rh nanoparticles under mild pressure and temperature. The competitive dehalogenation/hydrogenation was discussed in the light of the nature of metal.Figure optionsDownload full-size imageDownload as PowerPoint slide