Journal of Electroanalytical Chemistry, Vol.412, No.1-2, 103-108, 1996
Effect of Poly(Acrylonitrile-Co-Butadiene) on the Charge-Transfer Rate in Polypyrrole Film
The electrochemical behavior of polypyrrole (PPy) electropolymerized within poly(acrylonitrile-co-butadiene) (PAB) was compared with that of PPy deposited on Pt in terms of cyclic voltammetry, chronoamperometry, and chronopotentiometry in acetonitrile. The PAB coating was not removed after the PPy deposition. The reduction peak potentials of a PPyPABPt electrode occurred at more negative potentials than those of a PPyPt electrode. For both electrodes anodic and cathodic peak currents were proportional to the scan rate below 100 mV s(-1), but to the square root of the scan rate beyond 200 mV s(-1). The apparent diffusion coefficient of ClO4- in the PPy + PAB was estimated to be 1.6 times larger than that in the PPy. The more porous and rougher structure of the PPy film grown within the PAB layer had higher anodic and cathodic currents, faster charging and discharging rates and a larger capacity.