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Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

机译：用花样氮化物氮化物纳米片的高效合成氮掺杂碳，从而改善氧还原反应

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摘要

A novel three-dimensional (3D) electrocatalyst composite was successfully prepared through a facile hydrothermal method, consisting of tungsten nitride nanosheets with flower-like morphology (WN FNs) and nitrogen-doped carbon black (N-C). Highly crystalline WN FNs were observed to be uniformly distributed in N-C, and remarkably promoted the catalytic activities toward oxygen reduction reaction (ORR) of the N-C. Moreover, the electrochemical results proved that, WN FNs/N-C composite shows a significantly higher ORR activity with a 4-electron transfer pathway and limiting current density of 5.8 mA cm(-2) in alkaline solutions. The stability test of the nanocomposite showed less degradation after 5 h and its methanol tolerance also was enhanced compared with Pt/C. The improved performance of the WN FNs/N-C composite can be attributed to its unique configuration and the increased exposure of active sites, which suggests that it could serve as an ideal candidate for developing high performance ORR catalysts.
机译：通过一个浅显的水热法成功地制备了一种新的三维（3D）电极催化剂复合物，包括氮化钨纳米片的花样形态（WN FNS）和氮掺杂的炭黑（N-C）。观察到高度结晶WN FNs的均匀地分布在N-C，并显着促进向N-C的氧还原反应（ORR）的催化活性。此外，电化学结果证明，WN的FN / N-C复合材料示出了显著更高ORR具有4电子传递途径活性和限制在碱性溶液中5.8毫安厘米（-2）电流密度。 5小时后，将纳米复合材料的稳定性测试表明较少的降解和其甲醇公差也用的Pt / C相比增强。的WN的FN / N-C复合材料的改进的性能可以归因于其独特的结构和活性部位的曝光增加，这表明它可以作为开发高性能ORR催化剂的理想候选。

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  • 来源
    《RSC Advances》 |2017年第54期|共8页
  • 作者

    Zhang Jie; Chen Jinwei; Yang Haowei; Fan Jinlong; Zhou Feilong; Wang Yichun; Wang Gang; Wang Ruilin;

  • 作者单位

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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