ELECTROCRYSTALLIZATION OF COPPER SULPHIDE (CU2S) ON COPPER.

Article abstract of DOI:10.1016/0013-4686(84)87057-7

The anodic formation of copper sulfide on copper was studied at various pH and sulfide concentrations. The kinetics and mechanism of film formation were elucidated by cyclic voltammetry and transient techniques. It was found that the film grows by a nucleation and growth mechanism controlled by localized hemispherical diffusion which, at long times, turns into linear diffusion due to overlapping of the diffusion zones of neighbouring centers. The analysis indicates that the number of active centers available for the nuclei formation is finite. The kinetic parameters for the nucleation have been interpreted according to the classical and atomistic models of nucleation. It is also shown that potentiostatic and galvanostatic techniques give comparable results.