Activation Energies of Anodic Gold Reactions in Aqueous Alkaline Cyanide

Abstract

The kinetics of the anodic reactions of gold in aqueous alkaline cyanide in the potential range −0.81 to +0.64V were studied by means of potentiostatic and potentiodynamic measurements for the temperature range 0°–50°C. The effects of mass transfer were also investigated. As in earlier works, three distinct regions of anodic activity (i.e., regions of anodic reactions) were found in potentiostatic measurements. The kinetic behavior of the gold reaction in each of these regions was found to behave in the manner predicted by the single reaction mechanism