THE EFFECTS OF ANIONS AND CATIONS ON OXYGEN REDUCTION AND EVOLUTION REACTIONS ON PLATINUM ELECTRODES
WESTERN RESERVE UNIV CLEVELAND OH ELECTROCHEMISTRY RESEARCH LAB
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The effects of 0.0010 to 1.0 M of various anions and cations added to 1 N H2SO4 and 1 M NaOH solutions on oxygen-reduction at pre-anodized and precathodized platinum electrodes were examined by measuring the coulombic efficiency for the formation of hydrogen peroxide. Current potential curves were also obtained. Results are discussed on the basis of the adsorption of cations and anions on the oxide or hydroxide covered electrode surfaces with emphasis on the ion exchange properties of the oxides. Evidence for various oxide films and or adsorbed oxygen on platinum electrodes is summarized. A voltammetric study of a special oxide layer formed on an excessively anodized platinum electrode is also described.
- Inorganic Chemistry