Electrocatalysis of Anodic Oxygen Transfer Reactions: Detection of Soluble Intermediate Products during Electrodeposition and Stripping of β‐Lead Dioxide at a Gold Electrode

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Abstract
An Au rotated ring‐disk electrode (RRDE) was applied for the detection of soluble intermediate products during the anodic electrodeposition and cathodic dissolution of in solutions of . A soluble species which only can be reduced at the ring electrode is produced during the anodic nucleation and deposition processes for at the disk electrode. This soluble intermediate product is concluded to be Pb(IV) which is probably associated with oxygen, e.g., or . The cathodic ring current from detection of the soluble Pb(IV) species was studied as a function of the concentrations of Pb(II) and , and variation of rotational velocity. The results are consistent with chronamperometric data for deposition described previously. Soluble Pb(IV) and Pb(III), as well as Pb(II), are concluded to be products of the cathodic dissolution of .

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