MECHANISM OF SILVER ELECTRODEPOSITION FROM SILVER-CYANIDE COMPLEX SOLUTIONS

The mechanism of silver electrodeposition from silver-cyanide complex solutions was investigated. It was found that electrodeposition of sil ver in the solution containing only 0.1M KAg(CN)(2) occurred by the di scharge of AgCN near the rest potential, and also by the discharge of Ag(CN)(2)(-) at a potential less than -0.74V(vs Ag-AgCl). In the solut ion containing 0.3M Ag(CN) and 2.1M KCN, electrodeposition of silver o ccurred by the discharge of Ag(CN), near the rest potential, and also by the discharge of Ag(CN)(3)(2-) at a potential less than -0.98V. In the solution containing 0.3M Ag(CN) and 4.5M KCN, electrodeposition of silver occurred by the discharge of Ag(CN)(2)(-) near the rest potent ial, and also by the discharge of Ag(CN)(3)(2-) at a potential less th an -1.02V, and also by the discharge of Ag(CN)(4)(3-) at a potential l ess than -1.25V.