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A Study on the Electrodeposition of Palladium-Iron Alloy and Its Electrocrystallization Mechanism

The electrodeposition and electrocrystallization mechanism of palladium-iron alloy are studied by the methods of cyclic voltammetry and potential step. The results show that in the system of the electrolyte solution which is made up of FeSO_4·7H_2O and Pd(NH_3)_2Cl_2 being acted as the main salts, sulfosalicylic acid (SSCS) being the complexing agent and ammonium sulfate being the conductance salt, co-deposition of Pd-Fe alloy lives nucleation and no underpotential deposition; it’s a irreversible process; according to the i～t curves of potential step, a conclusion can be drawn that the electrocrystallization of Pd-Fe alloy obeys the mechanism of instantaneous nucleation and three dimensional growth by attributing the potential step curve and calculating data of Pd-Fe alloy codeposition .