1.  Cathodic Deposition of Pb from Ionic Liquids Based on Choline Chloride

Authors: F. Golgovici


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

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