Abstract:
This paper reports the electrodeposition of Pb films on Pt using ionic liquids based on choline chloride: ethylene
glycol eutectic mixture (ChCl-EG, 1:2 moles) in the 45-65 0C temperature range. Lead ion (as PbCl2) was dissolved in
ChCl:EG ionic liquid at concentrations in the range of 1-5 mM. The mechanism of Pb electrodeposition was investigated
by cyclic voltammetry and electrochemical impedance spectroscopy. Cyclic voltammograms show a single cathodic peak
of Pb deposition, with an amplitude increased with Pb2+ concentration, scan rate or temperature. Nyquist and Bode
impedance spectra show differences in Pt behavior due to its polarization at various cathodic potentials.
Keywords:
lead, choline chloride : ethylene glycol eutectic, ionic liquid, electrodeposition
PDF Version