Electrochemical doping with meso-tetrakis(4-sulphonatophenyl)-porphyrincobalt of a polypyrrole film electrode

Abstract
A polypyrrole film electrode in which meso-tetrakis(4-sulphonatophenyl)porphyrincobalt is electrochemically doped as the counter anion shows excellent catalytic activity for the cathodic reduction of oxygen.