Evaluation of Bi-Functional Electrochemical Catalytic Activity of Co3O4-CoFe2O4 Composite Spinel Oxide

Oxygen reduction reaction (ORR) and oxygen evolution (OER) are important for developing energy systems such as fuel cells metal–air batteries. Precious metal catalysts, Pt IrO2, have been considered electrochemical catalysts because of their excellent activity the ORR OER. However, disadvantages, low durability long-term operation high price, necessitate development alternative catalysts. Transition oxides with electrical conductivity, efficiency, stability owing to OER activities, which similar those precious Therefore, in this study, composite catalyst materials comprising Co3O4 CoFe2O4 spinel were synthesized via hydrothermal synthesis. The exhibit bi-functional catalytic large active surface area increased number vacancies nanostrain nanoparticles.