Study on Preparation and Electrocatalytic Performance of Self-supported Carbon Transition Metal Catalysts

Ni/CP and FeO/CP oxygen evolutionOxygen evolution electrocatalysts were prepared by one-step electrodepositionElectrodeposition on carbon paper (CP). X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the structure and morphology of catalysts. Compared with CP before deposition, CP was completely covered by Ni and FeO. The electrochemical performances of Ni/CP and FeO/CP were measured by cyclic voltammetric curves (CV), anodic polarization curve, and electrochemical impedance spectra (EIS). The results show that the overpotentialOverpotential of CP, Ni/CP, and FeO/CP was 776 mV, 854 mV and 788 mV respectively at the current density of 50 mA cm−2, and the double layer capacitors were 43.30 mF cm−2, 55.65 mF cm−2, and 99.20 mF cm−2, respectively. Ni/CP and FeO/CP can carry more charge and have better electrocatalyticElectrocatalytic performance of oxygen evolutionOxygen evolution; consequently they have the potential to be used as new zinc electrowinning anode materials.