Preparation and Oxygen Reduction Catalytic Performance of Nichol Electrode with Platinum and Palladium Particles Loaded onto Polyaniline

Pt Pd/Ni electrode was prepared by despositing Pt and Pd particles on a Ni electrode by potentiostatic method. Polyaniline was electropolymerized onto Ni by the cyclic voltammetric method, and then Pt and Pd particles were deposited on a polyaniline modified Ni electrode by potentiostatic method to make the Pt Pd PANi/Ni electrode. Catalytic activities of the prepared electrodes were studied by Linear Sweep Voltammetry(LSV), Electrochemical Impedance Spectroscopy(EIS), SEM and EDS techniques. The results showed that both the dispersion and the efficiency of utilization in electro catalysis of Pt and Pd particles with the size of 1 μm to 5 μm were improved. With the same load of Pt and Pd, Pt Pd PANi/Ni electrode presented better performance in oxygen electric catalytic reduction activity than that of Pt Pd/Ni. The best performance of Pt Pd PANi/Ni appeared when polyaniline was swept for 600 s and then deposited with 5 cycles.