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首页> 外文期刊>Journal of Materials Research >Well dispersed Fe_2N nanoparticles on surface of nitrogen-doped reduced graphite oxide for highly effcient electrochemical hydrogen evolution
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Well dispersed Fe_2N nanoparticles on surface of nitrogen-doped reduced graphite oxide for highly effcient electrochemical hydrogen evolution

机译：氮掺杂还原氧化石墨表面上分散良好的Fe_2N纳米颗粒，可高效电化学析氢

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摘要

It is important to fabricate iron-based nitride/conductive material composite to obtain good catalytic performance. In this work, Fe_2N nanoparticles with diameter of approximately 30 nm have been successfully dispersed on the surface of nitrogen-doped graphite oxide (NrGO) by a facile sol-gel method and further ammonia atmosphere treatment. XPS, XRD, Raman, and TEM proved that Fe_2N nanoparticles are well monodispersed, and nitrogen atoms are doped in NrGO. The composite possessed two merits, that is, the more catalytic active site in Fe_2N nanoparticles due to the well monodispersion, and fast electron transfer due to the nitrogen dope in rGO. With the proper ratio, the composite exhibited brilliant catalytic activity and durability in acidic media. It possesses overpotential of 94 mV to approach 10 mA/cm~2, a small Tefel slope of 49 mV/dec, and maintains the good electrocatalytic activity for 10 h. Cyclic voltammetry and electrochemical impedance spectroscopy indicated that the electrocatalyst possessed high catalytic active area and fast electron transfer. Our work may provide a new avenue for the preparation of low-cost iron-based nitride/NrGO composite for highly efficient electrochemical hydrogen evolution.
机译：重要的是制造铁基氮化物/导电材料复合物以获得良好的催化性能。在这项工作中，直径约30 nm的Fe_2N纳米颗粒已通过便捷的溶胶-凝胶法和进一步的氨气处理成功地分散在掺氮氧化石墨（NrGO）的表面上。 XPS，XRD，Raman和TEM证明Fe_2N纳米粒子良好地单分散，并且NrGO中掺杂了氮原子。该复合材料具有两个优点，即由于良好的单分散性，Fe_2N纳米颗粒中的催化活性位点更多，以及由于rGO中的氮掺杂而实现了快速的电子转移。以适当的比例，该复合物在酸性介质中显示出出色的催化活性和耐久性。它具有94 mV的过电势，接近10 mA / cm〜2，Tefel斜率小，为49 mV / dec，并在10 h内保持良好的电催化活性。循环伏安法和电化学阻抗谱表明，该电催化剂具有较高的催化活性面积和快速的电子转移。我们的工作可能为制备用于高效电化学制氢的低成本铁基氮化物/ NrGO复合材料提供一条新途径。

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  • 来源
    《Journal of Materials Research》 |2017年第9期|1770-1776|共7页
  • 作者

    Yi Zhang; Ying Xie; Yangtao Zhou; Xiuwen Wang; Kai Pan;

  • 作者单位

    Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People's Republic of China;

    Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People's Republic of China;

    Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People's Republic of China;

    Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People's Republic of China;

    Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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