Abstract
The present study demonstrated that, when a Cu-Ti electrode pair was polarized in an aqueous SO4 2-electrolyte, Cu was oxidized to a divalent state, under AC.In the solution volume, Cu 2+ interacted with OH¯, to produce Cu(OH)2.Depending on the electrolysis conditions, Cu(OH)2 underwent a dehydration reaction, which produced CuO.Under industrial AC, each electrode was alternately polarized, firstly towards the anode, then to the cathode.CuE passivation did not occur.With a change in j on TiE, in the range from 0 to 75 kA/m 2 , CuE dissolution CE increased, reaching 96.5%.When j on CuE was increased to 1000 A/m 2 , Cu dissolution CE was above 90%.The most favourable conditions for CuE dissolution were a Na2SO4 Ct from 65 to 75 g/L, experiment duration of 1 h, room T, and I frequency of 50 Hz.The obtained CuO (II) composition was identified by XRD and EDXRF analyses.