Analysis of the kinetics and current efficiency of pyrrole galvanostatic electropolymerization

We propose a modified kinetic equation for the galvanostatic electropolymerization of pyrrole based on equal rates of monomer disappearance and its galvanostatic electropolymerization associated with applied current (I). The equation is distinguished by a zero-order kinetic plot and takes into account the effects of the pyrrole initial concentration ([M]_o) and current efficiency (η). We propose a mechanism for obtaining a η of less than 100% and increasing η with increasing [M]_o and I on the basis of the diffusion of radical cations (M^.+) from the anode surface to the bulk solution after the electroreduction of M^.+ to mpnomer molecules at the cathode.