The Influence of Thallium on the Redox Reaction Cr3+/Cr2+

Investigations on the kinetics and electrocatalysis of the Cr3+/Cr2+ reaction were carried out. By means of cyclic voltammetry, it was discovered that the addition of thallium‐I‐chloride not only accelerates the Cr3+/Cr2+ reaction in electrolytes catalytically, using graphite electrodes with small amounts of Au, but also raises the hydrogen overvoltage more than lead and bismuth, the heavy metal catalysts already tested in the practical redox cells. Investigations concerning the reaction rate, the influence of chrome ion concentrations, the electrolyte storage time, temperature, and the presence of iron are being conducted.