Redox Couple Behavior on Lithiated Nickel Oxide Electrodes

Abstract
The rotating electrode technique has been used to study the kinetics of various redox couples , Fe2+ /Fe3+, Cr2+ /Cr3+, and quinone/hydroquinone] on mosaic lithiated nickel oxide electrodes in sulfate solutions. At potentials cathodic to the flatband potential, the redox reactions are very inhibited. At potentials anodic to the flatband potential, the oxidation of the ferrocyanide ion exhibits a transfer coefficient of a with an apparent standard rate constant approximately two orders of magnitude smaller than on Pt. The other couples exhibit abnormal transfer coefficients under these conditions, probably because of specific adsorption on the oxide electrode surface.