The SEM Observation of the Potentiostatic Oxidation of Lead Sulfate on a Gold Plate in Sulfuric Acid Solution

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Abstract
The oxidation of lead sulfate deposited on the electrode by the discharge of , which was electrodeposited onto the gold planar plate, was studied by the observation of the surface, the cross section, and the interface between the gold substrate and the oxidized film with a scanning electron microscope. The conversion of lead sulfate film to lead dioxide involved three processes: (i) the formation of the thin lead dioxide layer at the interface between lead sulfate and the gold plate; (ii) the two‐dimensional growth of the thick lead dioxide layer at the inner part of lead sulfate film; and (iii) the oxidation of lead sulfate near the interface between lead sulfate and a sulfuric acid solution.

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