Objective:To reduce the commercial cost of fuel cells is of importance to develop biomass-based oxygen reduction catalysts with cost-effective,highly efficient and long-lasting as an alternative to noble metal oxygen reduction catalysts.Methods:Bio-based carbon materials loaded with Co nanoparticles(Co-C)were synthesized by dipping and high-temperature heat treatment using the peel of fertile oranges and Co(NO3)2·6H2O.Results:The findings indicated that the prepared Co-C catalyzed Oxygen Reduction Reaction(ORR)at the average electron transfer number of 3.59 in 0.1 mol/L KOH solution,which was close to the four-electron catalytic pathway.The Co-C had excellent catalytic performance.Moreover,the onset potential of Co-C(-0.11 V)was close to that of commercial Pt/C(-0.10 V,Pt 20％).The stability and methanol resistance of the prepared Co-C were superior to commercial Pt/C(Pt 20％).Conclusion:This biomass-derived orange peel-based porous carbon loaded with Co nanoparticles has enormous application potential in the field of electrocatalysis.
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