Preparation and Catalytic Performance for Oxygen Reduction of Nitrogen Doped MnCo2O4/N-KB

MnCo2O4/N-KB catalysts was prepared by hydrolysis-hydrothermal method, in which Mn (Ac)2 and Co (Ac)2 were used as precursors and nitrogen doped conductive carbon Ketjenblack (KB) was used as the carbon source. The microstructure of the MnCo2O4/N-KB catalysts and its catalytic performance for oxide reduction reaction were studied. The results showed that chemical coupling was formed between N-KB and MnCo2O4. It produced synergistic effect and effectively improved the oxygen reduction activity of MnCo2O4/N-KB catalyst. When the mass ratio of MnCo2O4 to N-KB was 1:9, the limiting current density of the reaction was 5.7 mA"cm' and the half wave potential was close to 0.81 V. MnCo2O4/N-KB catalyst obtained the best electrocatalytic performance for oxygen reduction. Comparing to the commercial Pt/C catatlyst with a current density of 5.2 mA " cm' and a half-wave potential 0.83 V, MnCo2O4/N-KB catalyst had a highly active oxygen reduction with higher ultimate current density and durability under the same capacity condition.