Abstract
The effects of added cations and anions on the nucleation and growth of lead dioxide were studied at a gold rotating disc electrode. The accumulation of electrodeposited lead dioxide in the presence of a high concentration of As(III) does not proceed because the chemical stripping rate of lead dioxide by As(III) is greater than its deposition rate. Among anions, sulfate and nitrate greatly enhance the rate of deposition of lead dioxide whereas phosphate decreases the rate of deposition. It is shown that the growth of PbO 2 on the gold substrate is not a uniform process, but proceeds by preferential growth on specific sites on the surface of the substrate.
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