First stages of silver electrodeposition in a deep eutectic solvent. Comparative behavior in aqueous medium

摘要: Abstract The aim of the present work was to study viability a deep eutectic solvent (DES) (consisting in mixture 1 choline chloride: 2 urea) as electrolyte for electrodeposition silver (I), paying special attention influence liquid on mechanism nucleation process. As this DES is rich chloride anion, which can act complexing agent cation, parallel analysis made, reference, aqueous media, both free-chloride solution and excess chloride. These studies were made analyze role anion first stages electrodeposition, but also compare changes depending medium, especially when used. For all solutions, cyclic voltammetry useful establish potential range at occurred, while potentiostatic technique used In deposition follows three dimensional growth governed by diffusion. Scharifker–Hills model demonstrated. rising parts j – t transients confirms obtained results model. Diffusion coefficients species calculated from linear regression vs −1/2 long times.