The electrocatalytic ORR performance of the different electrocatalysts were assessed using a rotating disc electrode (RDE) in a 0.1 M KOH electrolyte. Cyclic voltammetry (CV) and linear scan voltammetry (LSV) measurements were conducted, employing the coated glassy carbon electrode, graphite rod and Ag/AgCl as the working, counter, and reference electrodes, respectively. The CV curves comparing O2-saturated and N2-saturated electrolytes clearly show significant ORR electrocatalytic activity on a high surface area electrode (Figure ). Figure shows