Electrochemical Behavior of Novel Ti/IrO<i>_x</i>−Sb₂O₅−SnO₂ Anodes

TL;DRAbstract

There are growing interests in anodes for oxygen evolution because of the importance of this reaction in many electrochemical processes such as water electrolysis, electroplating, electrosynthesis, metal electrowinning, and electroflotation. Ternary IrOx−Sb2O5−SnO2 has been shown to be among the best elecytrocatalysts for oxygen evolution. Its high stability and relatively low cost will make it more attractive than IrOx and many other electrocatalytic materials. In this paper, the open-circuit potential, voltammetric behavior, oxygen evolution mechanism, and kinetics of the IrOx−Sb2O5−SnO2 coated titanium anodes were studied. It was found that the open-circuit potential could change significantly during the initial period of time probably because of the hydration of the coating film. Cyclic voltammograms obtained on Ti/IrOx−Sb2O5−SnO2 were somewhat different from those on IrOx coated anodes. Apparent cathodic peaks from Ir(III)/Ir(IV) and Ir(IV)/Ir(V) were observed. However, the corres

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