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首页> 外文期刊>Applied Surface Science >Onion-derived N, S self-doped carbon materials as highly efficient metal-free electrocatalysts for the oxygen reduction reaction
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Onion-derived N, S self-doped carbon materials as highly efficient metal-free electrocatalysts for the oxygen reduction reaction

机译：洋葱衍生的N，S自掺杂碳材料，是用于氧还原反应的高效无金属电催化剂

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摘要

Onion-derived nitrogen, sulfur self-doped nanoporous carbon spheres (NSC) as efficient metal-free electrocatalyst were synthesized via a facile hydrothermal and subsequent pyrolysis process. The typical NSC with a high BET specific surface area of 1558 m(2) g(-1), contains 6.23 at.% N and 0.36 at.% S, and possesses high concentration of pyridinic and graphitic nitrogen species. Experimentally, the best performance was the NSC-A2 which showed excellent catalytic activity to oxygen reduction reaction via a 4 electron mechanism with an onset potential of 0.88 V (vs. RHE), and a superior stability comparable to commercial Pt/C catalyst. The high electrocatalytic activity is attributed to not only the synergistic effect of N and S dual doping in carbon and the sufficient active sites, but also its high BET specific surface area and suitable microporous structure. The results demonstrate that it is a simple and scalable approach for preparing efficient and low-cost carbon-based electrocatalysts for oxygen reduction reaction. (C) 2017 Published by Elsevier B.V.
机译：通过简便的水热和随后的热解过程，合成了洋葱来源的氮，硫自掺杂纳米多孔碳球（NSC）作为有效的无金属电催化剂。典型的NSC具有1558 m（2）g（-1）的高BET比表面积，包含6.23 at。％的N和0.36 at。％的S，并具有高浓度的吡啶和石墨氮物种。实验上，最好的性能是NSC-A2，它通过4电子机理对氧还原反应表现出出色的催化活性，起始电势为0.88 V（vs. RHE），并且具有与商用Pt / C催化剂相当的稳定性。高的电催化活性不仅归因于碳中N和S双重掺杂的协同效应以及足够的活性位点，还归因于其高BET比表面积和合适的微孔结构。结果表明，这是一种简单有效的方法，可用于制备高效，低成本的氧还原反应碳基电催化剂。 （C）2017由Elsevier B.V.发布

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  • 来源
    《Applied Surface Science》 |2018年第ptab期|626-634|共9页
  • 作者

    Yang Shuting; Mao Xinxin; Cao Zhaoxia; Yin Yanhong; Wang Zhichao; Shi Mengjiao; Dong Hongyu;

  • 作者单位

    Henan Normal Univ, Coll Phys & Mat Sci, Xinxiang 453007, Henan, Peoples R China|Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Henan Normal Univ, Coll Phys & Mat Sci, Xinxiang 453007, Henan, Peoples R China|Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

    Natl & Local Joint Engn Lab Mot Power & Key Mat, Xinxiang 453007, Henan, Peoples R China|Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mot Power, Xinxiang 453007, Henan, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Porous carbon; Metal-free electrocatalyst; Hydrothermal synthesis; Activation; Electrocatalysis; Oxygen reduction reaction;

    机译：多孔碳;无金属电催化剂;水热合成;活化;电催化;氧还原反应;

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