Abstract
The authors made the electrochemical studies on the electrode processes during copper electrodeposition with ionic liquids-reline as an electrolytic medium. Reline is a commercial name for a eutectic mixture of choline chloride and urea(1:2, molar ratio). This new proposed method of copper deposition is an ecological one because the ionic liquids are recyclable, non-volatile and non-toxic. Cyclic voltammetry investigations were conducted at 343 and 353 K in choline chloride-urea(Reline) deep eutectic solvent with single salt CuCl(generally in 0.05–0.38 mol/L concentration range). Electrochemical impedance spectroscopy investigations were conducted in choline chlorideurea ionic liquid with CuCl(0.05 mol/L). We investigated both cathodic and anodic processes of Cu+ ions at different sweep rates in this new electrolytic system based on choline chloride. We have proposed by this an alternative to the classical copper electrodeposition. Coefficient of diffusion, D 0, for the system Reline-CuCl is presented and the value of D 0 is 1.22×10−8 cm2/s.
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