The effect of anions on the anodic formation of copper sulphide films on copper

The influence of anions (Cl−, SO42−, HCO3−) on the anodic formation of Cu2S films on Cu was investigated using cyclic voltammetry at rotating disk electrodes. At low ionic strengths, film growth was partially or completely controlled by ionic migration within pores in the growing film depending on the sulphide concentration. At low sulphide concentrations and high ionic strengths, film growth was controlled by the rate of anodic formation of CuI...