新型炭材料2023，Vol.38Issue(1)：154-161,8.DOI:10.1016/S1872-5805(22)60649-8
电纺炭纳米纤维的铁氮位点嵌入及电催化氧还原反应
The synthesis of iron-nitrogen sites embedded in electrospun carbon nanofibers with an excellent oxygen reduction reaction activity in alkaline/acidic media
摘要
Abstract
Metal-nitrogen carbon catalysts have received great attention in the field of gas-evolving electrocatalysis due to their high activity,large specific surface area and efficient gas diffusion paths.A solution of porphyrin iron,g-C3N4 and polyacrylonitrile in N,N-dimethylformamide was sonicated and electrospun into doped polyacrylonitrile nanofibers(NFs),and the NFs were then sta-bilized and carbonized at 900 ℃ to prepare Fe-N/CNF catalyst for oxygen reduction reaction(ORR).It was found that the addition of g-C3N4 to the electrospinning precursor led to the formation of abundant Fe-N species in Fe3+and Fe2+valence states,while Fe3C nanoparticles were formed without adding g-C3N4.Compared to Fe3C/CNF prepared without g-C3N4,the Fe-N/CNF catalyst presents an 4e? improved oxygen reduction reaction activity in both alkaline and acidic media.Furthermore,as a cathode in Zn-air batteries,the Fe-N/CNF catalyst exhibits high performance with an open-circuit voltage of 1.49 V,a power density of 146 mW cm?2 and a spe-cific capacity of 703 mAh g?1.This work suggests a way to prepare metal-nitrogen-carbon catalysts for energy-related electrocatalyt-ic applications.关键词
静电纺丝/炭纳米纤维/氧还原反应Key words
Electrospun/Carbon nanofiber/Oxygen reduction reaction分类
通用工业技术引用本文复制引用
许翔翔,张念超,王俊英,王俊中..电纺炭纳米纤维的铁氮位点嵌入及电催化氧还原反应[J].新型炭材料,2023,38(1):154-161,8.基金项目
We acknowledge the financial support by grants from National Natural Science Foundation of China(22179138),Natural Science Foundation of Shanxi(20210302123005)and Shanxi Major Project(20181102026).国家自然科学基金(22179138),山西省自然科学基金(20210302123005),山西省重大科技专项(20181102026). （22179138）
