THE PHOTOELECTROCHEMICAL BEHAVIOR OF LEAD ELECTRODES IN H2SO4 SOLUTION

The mechanism of photoresponse during the anodic oxidation of rb elect rode was investigated, The results showed that there was photoactivati on during the oxidation of Pb electrode under illumination when the el ectrode potential was over 0 V. The study of the cathodic photorespons e of lead anodic films in tile cathodic potential region showed that t he lead anodic films could produce cathodic and anodic photocurrents. The cathodic photocurrent was produced by p-type lead oxide in the fil m, and the anodic photocurrent might be produced by the lead oxide, wh ich formed p-n junctions, The measurement of photo-potential was used to study rile constant current polarization of lead electrodes in H2SO 4 solution.