Abstract: In the application of fuel cells, it is important to research and develop low-cost high-performance transition metal nitrogen-carbon catalyst materials to replace high-cost noble metal catalysts. In this thesis, mixed different proportions of cobalt acetate tetrahydrate and melamine as precursors, Co-N-C catalysts were synthesized by pyrolysis method. The phase structure and morphology of the samples were characterized by XRD, SEM, XPS and other analytical techniques, and the electrocatalytic performance of the Co-N-C catalyst was tested and analyzed in alkaline electrolyte. The results show that the Co-N-C(1∶10) catalyst exhibits excellent electrocatalytic activity with a half-wave potential of 0.86 V in alkaline electrolyte, which is comparable to the half-wave potential of commercial 20% Pt/C catalyst. The Co-N-C catalyst exhibits good cycling stability, and its half-wave potential shifts to the left by 10 mV after 2 000 cycles, which is better than that of commercial Pt/C.

DOI: 10.3969/j.issn.1002-087X.2023.04.016