THE ELECTROCHEMISTRY OF OXYGEN ON NICKEL OXIDE,
Abstract
The electrochemistry of oxygen has been examined on both pure and lithiated nickel oxide prepared by the oxidation of nickel at elevated temperatures. The rest potentials of such electrodes in alkaline solutions containing oxygen and peroxide have been found to be very close to those expected on the basis of the standard electrode potential for the oxygen-hydrogen peroxide couple and follow the Nernst dependence on peroxide concentration expected for this couple. Cathodic coulombic efficiency measurements indicate that the majority of the current is derived from the reduction of oxygen to the peroxide. Voltammetry studies indicate that oxygen reduction to peroxide and the reverse process can be relatively easily accomplished on nickel oxide, particularly the lithiated nickel oxide, but that the further two-electron reduction of peroxide to water and hydroxide ions is extremely irreversible. The dissolution rates for NiO also have been examined in various solutions and found to be very low even in acid solutions at somewhat elevated temperatures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1964
- Accession Number
- AD0615495
Entities
People
- Akiya Kozawa
- Ernest B. Yeager
Organizations
- Case Western Reserve University