Ozone Evolution at the Lead Dioxide Electrode in Highly Acid
and Neutral Electrolytes: The Influence of Polarization
and Fluoride Ions on the Process Kinetics

A. A. Chernik, V. B. Drozdovich, and I. M. Zharskii

Belarussian State Technological University, Minsk, Belarus

Received July 11, 1995; in final form, January 29, 1996

Abstract—The influence of preliminary polarization and fluoride ions on the anodic behavior of the -PbO₂
electrode is studied by cyclic voltammetry in H₂SO₄, HClO₄, and HBF₄ solutions and in the (K₂HPO₄ +
KH₂PO₄) phosphate buffer of pH 7. The study is conducted at high anodic potentials under the conditions of
ozone generation. Saturation of the lead dioxide surface layer with oxygen is assumed to be the principal reason
for the anodic overvoltage decrease during polarization. The fluoride anion is shown to act as an inhibitor.

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