Co/Co2N/N/C oxygen reduction reaction catalysts derived from sisal fiber porous carbon and cobalt phthalocyanine

Abstract

Sisal fibers (SF) were used as carbon source for their long and uniform multiporous structure. The composite Co/Co2N/N/C catalysts by pre-activation SF porous carbon (SPC) and cobalt phthalocyanine (CoPc) were prepared by high-temperature pyrolysis and precise control of the composite proportion of SPC and CoPc. The catalyst treated with a composite proportion of SPC and CoPc of 1 to 4 (SPC@CoPc-1-4) exhibited high Eonset potential of 1.04 V, high stability of 90.50 %, and slightly lower E1/2 of 5 mV than Pt/C (20 wt%) catalyst. Considering the performance and price of catalysts in practical application, these composite catalysts combining biomass carbon materials and phthalocyanine series will be provide a valuable reference for non-precious metal oxygen reduction reaction (ORR) catalysts.