Abstract
Development of earth-abundant materials as novel substitutes for platinum group metal catalysts towards the oxygen reduction reaction (ORR) remains a great challenge to drive the commercialization of fuel cell. Iron-based catalysts were synthesized by using a metal-organic framework (MOF) as the precursor. FeNC-650, which is obtained by pyrolyzed at 650°C, is composed of Fe and Fe3O4 nanoparticles encapsulated in the nitrogen-enriched mesoporous carbon. It exhibits higher electrocatalytic activity and stability, compared with other FeNC catalysts and commercial Pt/C for ORR. The effect of pyrolysis temperature on active sites and unique structures is investigated. The excellent electrocatalytic performance and superior stability make it a promising non-precious metal catalyst for practical fuel cell application.
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