Preparation and Catalytic Performance of α-MnO2/Sr2Ni0.4Co1.6O6< /sub> Hybrid Bifunctional Electrocatalysts for Oxygen Reaction

摘要

The double perovskite Sr2Ni0.4Co1.6O6 was prepared, and a set of alpha-MnO2/Sr2Ni0.4Co1.6O6 hybrids with different alpha-MnO2 loadings were fabricated. The electrochemical experiments illustrate that the hybrid catalyst (40 wt% of alpha-MnO2) exhibited the highest activity, and the current density for the oxygen reduction reaction and oxygen evolution reaction were 0.2389 A cm(-2) (- 0.6 V vs. Hg/HgO) and 0.3951 A cm(-2) (1 V vs. Hg/HgO), respectively. The synergistic effect between alpha-MnO2 and Sr2Ni0.4Co1.6O6 was responsible for the improved catalytic activity.

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