煅烧
催化作用
材料科学
介孔材料
化学工程
碳纤维
静电纺丝
氧化物
纳米纤维
石墨烯
碳纳米纤维
大孔隙
贵金属
纳米技术
复合材料
化学
复合数
碳纳米管
冶金
有机化学
聚合物
工程类
作者
Weiyuan Ding,Houfa Zhu,Lu Lu,Jiadong Zhang,Hongquan Yu,Hong Zhao
标识
DOI:10.1016/j.jallcom.2020.156605
摘要
Fe-N/C catalyst is the most promising non-noble-metal catalyst to replace Pt/C, and has long been a material of interest to researchers. It is generally acknowledged that the morphology of carbon support exerts a significant effect on the performance of Fe-N/C catalyst. In this study, the Fe-N/C catalyst that retains the original three-dimensional (3D) structure after calcination was constructed by adding graphene oxide (GO) into the precursor solution by electrostatic spinning technology. The 3D structure is composed of more than 20 layers of interconnected carbon nanofiber networks with carbon nanofiber connections between layers. The dual pore distribution is formed after calcination, comprising macropores between layers and the rich mesopores (3.8 nm) in the nanofibers. Fe-N/C catalysts containing a single active substance of FexN-based, Fe3O4-based, and Fe3C-based material were prepared by adjusting the heat-treatment conditions. The FexN-based Fe-N/C catalyst exhibits the best oxygen reduction reaction (ORR) performance and is superior to commercially available 20 wt% Pt/C catalyst.
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