The Redox Chemistry of Ruthenium Dioxide: A Cyclic Voltammetry Study—Review and Revision

By cyclic voltammetry at high scan rates, the electrochemical properties of RuO 2 in acidic and alkaline solutions were investigated in detail. Thirteen current peaks can be distinguished in sulfuric acid and sodium hydroxide. With respect to the pH sensitivity of RuO 2 electrodes, we considered charge calculations, peak currents, and apparent diffusion coefficients. The nature of the Ru(II) oxidation was clarified by Ru(I)−Ru(III) species.