POTENTIAL-DEPENDENT TRANSFER-COEFFICIENTS OF THE ZN(II)-ZN(HG) ELECTRODE-REACTION IN AQUEOUS-SOLUTIONS

The electrochemical kinetic parameters of the Zn(II)/Zn(Hg) reaction at the DME were determined by phase-sensitive a.c. and square-wave polarography in a sufficiently wide potential range to test the Marcus prediction on the potential dependence of transfer coefficients. In 1 mol dm-3 solutions of perchlorate, nitrate, chloride, bromide, and thiocyanate, the apparent cathodic transfer coefficient was found to be a linear function of the electrode potential, the potential dependence being in agreement with the Marcus theory. © 1979 Elsevier Sequoia S.A.