Anodic deposition of manganese and cobalt oxides

Abstract

Our studies are extended to investigate conventient baths for the anodic deposition of managanese and cobalt oxides, and to check the utility of these oxides as indicator electrodes in potentiometric titrations. The results showed new baths for the deposition of these oxides from their metal salt solutions in presence of complexing agents. The results of electron microscopic investigation confirmed by data given in the A.S.T.M. cards for all the oxides coincided with those given by the chemical analysis. The migration mechanisms were proposed and discussed in the light of different factors affecting the anodic deposition of the oxides. The oxide electrodes showed sensitive variation with pH and were successfully used as indicator electrodes in potentiometric titrations. Sharp inflections were generally observed in the vicinity of the end points.