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MOF-derived porous carbon supported iron-based catalysts with optimized active sites towards oxygen reduction reaction

机译:MOF衍生的多孔碳负载具有优化的活性位点的铁基催化剂,朝向氧还原反应

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摘要

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 degrees C, is composed of Fe and Fe3O4 nanoparticles encapsulated in the nitrogen-enriched tnesoporous 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.
机译:作为铂族金属催化剂的新型替代反应(ORR)的新替代材料的开发仍然是推动燃料电池商业化的巨大挑战。 通过使用金属有机框架(MOF)作为前体合成铁基催化剂。 通过在650℃下热解获得的FERD-650由包封在富含氮棘碳中的Fe和Fe 3 O 4纳米颗粒组成。 它与其他FENC催化剂和商业PT / C相比,它表现出更高的电催化活性和稳定性。 研究了热解温对活性位点和独特结构的影响。 优异的电催化性能和优异的稳定性使其成为实际燃料电池应用的有前途的非贵金属催化剂。

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