Study on the Electrodeposition of Lead with In-Situ Ellipsometry

摘要

In this study, we applied the in situ spectroscopic ellipsometry (SE) technology to the electrochemicaltest, and combined with cyclic voltammetry (CV) mainly researched underpotential-deposited (UPD)of Pb on polycrystalline Cu. The results showed the kinetics of UPD Pb on polycrytalline Cu was aquasi-reversible two dimensional nucleation and growth process, the reversible Pb UPD potential is50mV. The substrate solution interface structure was described with an effective mediumapproximation (EMA) model, and the volume fraction of Pb and solution were fitted. Fitting resultsshowed that double layer charge and hydrogen reduction reaction cannot be ignored.