▎ 摘　　要

The perovskite oxide La0.4Sr0.6Co0.8Ni0.2O3 was prepared by sol-gel method and applied to the oxygen electrode. To further improve its catalytic activity, N-doped graphene (NG) was coupled with La0.4Sr0.6Co0.8Ni0.2O3. The samples were characterized structurally and morphologically using XRD, SEM, and FT-IR. The electrochemical test results showed that the current densities for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalyzed by the hybrid catalyst 10%NG (NG in total catalyst mass ratio of 10%) were 359 mA center dot cm(-2) (0.9 V vs. Hg/HgO) and 393 mA center dot cm(-2) (- 0.6 V vs. Hg/HgO), respectively. The excellent ORR/OER activity and stability of the hybrid catalyst can be attributed to the synergistic effect between La0.4Sr0.6Co0.8Ni0.2O3 and NG.