Double-layer Influence on the A.C. Polarographic Behaviour of Zinc(II)

Abstract

It has been shown that the structure of the double layer influences the reduction of zinc(II) by altering the rate and activation energy of the electrochemical reaction ; there was no evidence that the effective concentration of zinc(II) was different from the bulk concentration. In perchlorate solutions, there was a direct correlation between the activation energy of the reaction and the potential at the outer Helmholtz plane, while in the presence of specifically adsorbed iodide ions, the activation energy was considerably less, indicating a different and readier reaction path for the electron transfer over an iodide " bridge ".