One-step and one-pot method for synthesis of hybrid composite palladium-polypyrrole-carbon (Pd/PPy/C) nanomaterials

Abstract

63 A onestep and onepot method to design compos� ite nanomaterials based on conjugated polymer, poly� pyrrole, and palladium nanoparticles by the redox reaction of the monomer and a palladium salt in non� aqueous and aqueous media was described previously in the works of our team (1-3). These composite materials were successfully tested as heterogeneous catalysts for the most known organic syntheses (Suzuki reaction, direct C-C conjugation, Sonogash� ira reaction, etc.) and showed excellent catalytic activ� ity. This fact made such materials interesting for fur� ther investigation. The main feature of palladium-polypyrrole (Pd/PPy) composite nanomaterials consists is that the formation of palladium nanoparticles within polypyr� role globules requires no additional stabilizers in the system. Therefore, no protective layers appear on the surface of palladium nanoparticles so that it remains catalytically active. At the same time, the polymer resulting from the chemical reaction has a porous structure that favors the diffusion of reactants to cata� lytically active centers.