Electrochemical quartz crystal microbalance and cyclic voltammetry studies on PbSe electrodeposition mechanisms

Abstract
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 PbSe was found to occur by an induced codeposition mechanism via a six-electron 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.

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