Study of Copper Electrodeposition from Ammonia Bath with Different Electrochemical Techniques

Abstract

An electrochemical study for the copper electrodeposition on nanostructured carbon black films electrodes supported in glassy carbon (GC) is presented, using the cyclic voltammetry of reversal potential (Eλ), chronoamperometry, chronocoulometry and chronopotentiometry techniques in the electrolytic system 10-3M CuCl2;1M NH4OH, 1M KCl, pH =10. The cyclic voltammetry studies allow characterizing the potential range by copper electrodeposition in two steps: Cu(II) to Cu(I) and Cu(I) to Cu(0). A Chronocoulometry study shows an important adsorption process of chlorine ions, couple to the copper deposit. The quantity of monolayer and atoms of metallic copper, were evaluated by chronopotentiometry studies.