N, F?Codoped Microporous Carbon Nanofibers as Efficient Metal?Free Electrocatalysts for ORR

论文摘要

Currently, the oxygen reduction reaction（ORR） mainly depends on precious metal platinum（Pt） catalysts. However, Pt-based catalysts have several shortcomings, such as high cost, scarcity, and poor long-term stability. Therefore, development of e cient metal-free electrocatalysts to replace Pt-based electrocatalysts is important. In this study, we successfully prepared nitrogen-and fluorinecodoped microporous carbon nanofibers（N, F-MCFs） via electrospinning polyacrylonitrile/polyvinylidene fluoride/polyvinylpyrrolidone（PAN/PVDF/PVP） tricomponent polymers followed by a hydrothermal process and thermal treatment, which was achieved for the first time in the literature. The results indicated that N, F-MCFs exhibit a high catalytic activity(Eonset: 0.94 V vs. RHE, E1/2: 0.81 V vs. RHE, and electron transfer number: 4.0) and considerably better stability and methanol tolerance for ORR in alkaline solutions as compared to commercial Pt/carbon（Pt/C, 20 wt%） catalysts. Furthermore, in acidic media, N, F-MCFs showed a four-electron transfer pathway for ORR. This study provides a new strategy for in situ synthesis of N, F-MCFs as highly e cient metal-free electrocatalysts for ORR in fuel cells.

论文目录

文章来源

类型: 期刊论文

作者: Tianle Gong,Ruoyu Qi,Xundao Liu,Hong Li,Yongming Zhang

来源: Nano-Micro Letters 2019年01期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 有机化工

单位: Shanghai Electrochemical Energy Devices Research Center, Shanghai Key Lab of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University,School of Material Science and Engineering, University of Jinan

基金: funding for this work provided by the National Nature Science Foundation of China (51573090),National Key R&D Program of China (2016YFB0302000),Open Foundation from State Key Laboratory of Fluorinated Functional Membrane Material

分类号: TQ426

页码: 164-174

总页数: 11

文件大小: 1086K

下载量: 20

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