Electrogeneration kinetics of polyaniline in the presence of lithium perchlorate

Summary

Polyaniline (Pani) was electrogenerated potentiostatically (1 V vs Ag/Ag⁺) in acid aqueous medium (2 M HNO₃) in the presence of LiClO₄ on Pt electrodes. The kinetic equation of the polymerization process was calculated by means of the electrochemical data of the polymerization charge (Q_pol), determined as R_p= [E]^0.14 [M]². Furthermore, the number of electrons consumed per monomer unit incorporated in the oxidated polymer was determined. The results show that the electrolyte has practically no effect on the reaction kinetics at the concentrations tested, but that it is, moreover, the triggering factor for fewer electrons to be incorporated into the polymer chain.