Carbon nanotube(CNT)was used as raw materials,loaded with vitamin B12,and then subjected to simple pyrolysis to obtain a nitrogen doped carbon nanotube(N/CNT)and loaded with low content Co3O4 nanoparticles(Co3O4@N/CNT)as an oxygen reduction reaction electrocatalyst.Due to the uniformly dispersed Co3O4 nanoparticles and N-doped effect,Co3O4@N/CNT exhibited excellent oxygen reduction reaction catalytic performance,with a half wave potential of 0.844 V(vs RHE),surpassing the performance of commercial Pt/C(0.820 V vs RHE).Compared to Pt/C,the zinc-air battery based on Co3O4@N/CNT exhibited better discharge performance and cycle stability.
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