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

被引：5
作者：
Liu Pei [1 ,2 ,3 ]
Cheng Qingqing [1 ,3 ]
Chen Chi [1 ]
Zou Lianglian [1 ]
Zou Zhiqing [1 ]
Yang Hui [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
[2] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2018年 / 39卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Fe-N-C; Iron nitride; Oxygen reduction reaction (ORR); Carbon nanofibers; NH3-etching; FUEL-CELLS; GRAPHENE; EFFICIENT; ELECTROCATALYST; COMPOSITE; MEMBRANE; CATHODE; DURABILITY; ELECTRODES; NANOTUBES;
D O I：
10.7503/cjcu20180459
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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 NH3-etching. The FexN@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 Fex N@Fe-N-C. Ion probing and acid. etching experiments indicate that both Fe-N-x sites and FexN nanoparticles contribute to the ORR activity.
引用
收藏
页码：2492 / 2499
页数：8
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