A Tafel plot is a useful device for estimating the kinetic parameters. The number of electrons involved in the rate determining step can be evaluated from the slope of the Tafel plot. The average Tafel slopes were obtained at 0.1290 V decade−1, demonstrating a one electron process for rate determining step. The transfer coefficient (α) is a measure of the symmetry of the energy barrier. The value for αwas calculated to be 0.55 using the relationship of b=2.30 RT / n(1−α)F. This value indicates that the energy barrier is symmetrical.