Vergleichende Untersuchungen an Pb8Tl5O24-, α-PbO2- und Tl2O3-Elektroden / Comparative Investigations of Pb8Tl5O24, α-PbO2 and Tl2O3 Electrodes

Abstract

The anodic deposition of Pb8Tl5O24 is compared with that one of Tl2O3 and α-PbO2. Scanning electron microscopic pictures of the oxide surfaces show obvious differences. This should be the reason for different oxygen overpotentials measured at these anodes. Comparative cyclic voltammograms show, that the redox behaviour of Pb8Tl5O24 in sulfuric acid is essentially determined by the lead ions. Because of the high corrosion rate Pb8Tl5O24 is not suitable as anode material for electrolysis in sulfuric acid