Oxygen deficient interfacial effect in CeO2-modified Fe2O3/C for oxygen reduction reaction in alkaline electrolyte

We report fabrication of non-precious Fe2O3-CeO2/C electrocatalyst (EC) with rich interfacial structure for oxygen reduction reaction in alkaline electrolyte. Taking the advantage of its unique redox property it shows an appreciable positive onset potential (0.81 V vs. RHE), half-wave potential (0.57 V), smaller Tafel slope (68 mV dec−1) as compared to Fe2O3/C and higher limiting current density (− 6.05 mA cm−2) compared to that of 20 wt% Pt/C. Furthermore, it exhibits remarkable stability with 87.5% current retention during the chronoamperometric test, establishing it as a promising EC.