Electrochemical quartz crystal microbalance and cyclic voltammetry studieson PbSe electrodeposition mechanisms

Electrochemical reactions involved in the electrodeposition of PbSe and the electrochemical behaviour of the related precursors, HSeO3- and Pb(EDTA)(2 -), have been studied for the first time by combined electrochemical quartz crystal microbalance and cyclic voltammetry measurements. Formation of PbS e was found to occur by an induced codeposition mechanism via a six-electro n reduction reaction. HSeO3- is reduced by a four-electron reaction but the electrode becomes passivated. The reduction and oxidation of Pb(EDTA)(2-) occur via two-electron mechanisms, on the other hand, during the oxidation adsorption reactions are also observed.