The synthesis of 1-(N-But-4-yl-pyrrol)-1,2-bis(diphenylphosphino borane) ethane is described. Electropolymerisation of this monomer in acetonitrile produces functionalised polypyrrole films, bearing supported diphosphine ligands protected from oxidation by borane groups. The incorporation of palladium can be achieved in preformed films to generate palladium(0) catalysts.