包覆氮化铁的Fe,N掺杂碳纳米纤维的制备及对氧还原反应的催化性能  

Preparation and Oxygen Reduction Reaction Catalytic Performance of Fe,N Co-doped Carbon Nanofibers with Encapsulated Iron Nitride

作　　者：刘培 程庆庆 陈驰 邹亮亮[1] 邹志青[1] 杨辉[1,2] LIU Pei;CHENG Qingqing;CHEN Chi;ZOU Liangliang;ZOU Zhiqing;YANG Hui(Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100039,China)

机构地区：[1]中国科学院上海高等研究院,上海201210 [2]上海科技大学物质科学与技术学院,上海201210 [3]中国科学院大学,北京100039

出　　处：《高等学校化学学报》2018年第11期2492-2499,共8页Chemical Journal of Chinese Universities

基　　金：国家重点研究发展计划项目(批准号:2017YFA0206500);国家自然科学基金(批准号:21673275;21533005)资助~~

摘　　要：通过静电纺丝、碳化和氨气刻蚀制备了具有核-壳结构的包覆氮化铁(FexN)纳米颗粒的Fe,N共掺杂多孔碳纳米纤维(FexN@Fe-N-C),并研究了其在酸性和碱性介质中对氧还原反应(ORR)的电催化性能.结果表明,该催化剂具有优异的氧还原催化活性,在酸性介质中的半波电位(E1/2)可达0. 81 V(vs. RHE),在碱性条件下的E1/2高达0. 897 V,高于商业Pt/C催化剂.在酸性介质中经过10000周加速衰减测试后,FexN@Fe-N-C的E1/2仅衰减了26 m V,展示出极佳的耐久性.离子探针和浓酸刻蚀实验结果表明,Fe-Nx以及FexN纳米颗粒均对ORR有重要催化作用.Fe,N co-doped porous carbon nanofibers with iron nitride(Fe x N)nanoparticles encapsulated in Fe,N co-doped carbon shell(Fe x N@Fe-N-C)were preparated through electrospinning,carbonization and NH 3-etching.The Fe x N@Fe-N-C catalyst exhibits excellent catalytic activity for oxygen reduction reaction(ORR)in both acid and alkaline media.The half-wave potential(E 1/2)in acidic medium can reach to 0.81 V(vs.RHE),while the E 1/2 in alkaline medium is 0.897 V(vs.RHE),which is even higher than that of commercial Pt/C catalyst.After 10000 cycles of accelerated durability test in acid media,the E 1/2 only decreases by 26 mV,demonstrating the excellent durability of Fe x [e-mail] probing and acid-etching experiments indicate that both Fe-N x sites and Fe x N nanoparticles contribute to the ORR activity.

关 键 词：Fe-N-C 氮化铁 氧还原反应 碳纳米纤维 氨气刻蚀 

分 类 号：O646[理学—物理化学]