SIMULTANEOUS UNDERPOTENTIAL DEPOSITION OF LEAD AND THALLIUM ON POLYCRYSTALLINE SILVER-III

Simultaneous underpotential deposition of lead and thallium from a tar trate medium on a polycrystalline silver electrode is reported. Result s of cyclic voltammetric investigations of the effects of concentratio n and sweep rate on the codeposition behaviour are discussed. Further investigations of the codeposition behaviour through voltammetric expe riments using programmed potential inputs are described and discussed in terms of formation of a two-dimensional alloy. Finally, the validit y of the existing models of electrochemical phase formation has been i nvestigated under the codeposition conditions.