Synthesis and characterization of a new platinum supported catalyst based on poly-{acrylamide-co-[3-(acryloylamino)propyltrimethylammoniumchloride]} as carrier

In the following the synthesis of a new platinum supported catalyst founded upon the title copolymer is described. Adsorption of hexachloroplatinic acid through an ion exchange process followed by reduction in hydrogen leads to a catalyst which is useful in various heterogeneous gas phase reactions. Using several copolymers in different monomer proportions, it is demonstrated that a polymer carrier of composition 90% acrylamide and 10% quaternary compound is the most active one. On the basis of results obtained by use of X-ray photoelectron spectroscopy the presence of Pt-0 and Pt2+ species on the surface of the carrier is proved. It is shown that both species are influenced by amide and quaternary groups of the support. Taking the catalytic activity of samples which differ in the Pt-0 and Pt2+ content into consideration, it is demonstrated that platinum in the zerovalent state is active in the reactions.