Fe3C@nitrogen doped CNT arrays aligned on nitrogen functionalized carbon nanofibers as highly efficient catalysts for the oxygen evolution reaction
Fe3C@nitrogen doped CNT arrays aligned on nitrogen functionalized carbon nanofibers as highly efficient catalysts for the oxygen evolution reaction
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DOI：
10.1039/c7ta05936a
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发表时间：
2017-09
影响因子：
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通讯作者：
Yufei Zhao;Jinqiang Zhang;Xin Guo;H. Fan;Wenjian Wu;Hao Liu;Guoxiu Wang
中科院分区：
文献类型：
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作者：
Yufei Zhao;Jinqiang Zhang;Xin Guo;H. Fan;Wenjian Wu;Hao Liu;Guoxiu Wang
Fe_3C基催化剂被认为是最有前途的析氧反应电催化剂之一。在此，我们报告了一种纳米结构材料，该材料由封装在富氮碳纳米管（NCNT）尖端的Fe 3C纳米颗粒组成，该纳米结构材料通过可扩展的静电纺丝技术排列在一维（1D）氮掺杂碳纳米纤维（Fe 3C @NCNTs-NCNFs）上，作为高性能OER催化剂。Fe 3C @NCNTs-NCNFs独特的3D分层结构导致高度暴露的活性位点、增强的电子转移性质和强的协同偶联效应。Fe 3C @NCNTs-NCNFs表现出出色的催化性能，具有高电流密度（10 mA cm-2，284 mV的过电位）、低塔菲尔斜率（56 mV dec-1）、低电荷转移电阻和在1 M KOH溶液中的强耐久性。电化学评价表明，Fe 3C @NCNTs-NCNF复合材料是一种很有前途的碱性OER电催化剂。
Fe3C based catalysts are found to be one of the most promising electrocatalysts for the oxygen evolution reaction (OER). Herein, we report on a nanoarchitectured material composed of Fe3C nanoparticles encapsulated at the tip of nitrogen-enriched carbon nanotubes (NCNTs), which are aligned on one dimensional (1D) nitrogen-doped carbon nanofibers (Fe3C@NCNTs-NCNFs) by a scalable electrospinning technique, as a high performance OER catalyst. The unique 3D hierarchical architecture of Fe3C@NCNTs-NCNFs leads to highly exposed active sites, enhanced electron transfer properties and strong synergistic coupled effects. Fe3C@NCNTs-NCNFs exhibit an outstanding catalytic performance with a high current density (10 mA cm−2 at an overpotential of 284 mV), a low Tafel slope (56 mV dec−1), a low charge transfer resistance and strong durability in 1 M KOH solution. The electrochemical evaluation demonstrates that the Fe3C@NCNTs-NCNF composite is a promising electrocatalyst for the OER in alkaline solution.