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Self-Assembly of Hierarchical Ni-Mo-Polydopamine Microflowers and their Conversion to a Ni-Mo_2C/C Composite for Water Splitting

机译:分层Ni-Mo-聚德莫多胺微母线的自组装及其转化为水分裂的Ni-Mo_2C / C复合材料

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摘要

With the aim of finding efficient non-noble metal catalysts for water splitting, hierarchical Ni-Mo-polydopamine microflowers (Ni-Mo_2C/C MF) were synthesized through a facile aqueous-phase reaction at room temperature. NiMoO_4 nanowires were utilized as both Ni and Mo source; they can complex with dopamine to form a hierarchical structure and affect the scale of the final product. The energy dispersive spectroscopy (EDS) measurement of Ni- Mo_2C/C microflowers (MF) shows a high content of Mo_2C and Ni (>90 wt%). For the hydrogen evolution reaction (HER), the Ni-Mo_2C/C MF displays a low overpotential of 99 mV at a current density of -10 mAcm~(-2) and a small Tafel slope of 73 mVdec~(-1) in 1.0m KOH. By comparison with Mo_2C/C microspheres (MS), the nanosized Ni-doped particles offer more active sites and enhance the kinetic performance. This facile synthesis strategy is also suitable for preparing other metal-Mo_2C/C composites that can be used in the fields of catalysis and energy conversion.
机译:目的是寻找用于水分裂的有效的非贵金属催化剂,通过室温的容易水相反应合成等级Ni-Mo-聚德莫多胺微射线(Ni-Mo_2C / C MF)。 NIMOO_4纳米线用作Ni和Mo来源;它们可以复杂化多巴胺以形成分层结构并影响最终产品的规模。 NI-MO_2C / C微射线(MF)的能量分散光谱(EDS)测量显示出高含量的MO_2C和Ni(> 90wt%)。对于氢进化反应(她),Ni-Mo_2C / C MF在-10mmm〜(-2)的电流密度下显示99 mV的低过电位,并且小Tafel斜率为73 mvdec〜(-1) 1.0m酸。通过与MO_2C / C微球(MS)的比较,纳米型Ni掺杂颗粒提供更多的活性位点并增强动力学性能。该容易合成策略也适用于制备可用于催化和能量转换领域的其他金属-MO_2C / C复合材料。

著录项

  • 来源
    《Chemistry: A European journal》 |2017年第19期|共7页
  • 作者单位

    State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China);

    State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China);

    State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China);

    State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China);

    State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China);

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    electrocatalysis; hydrogen evolution reaction; molybdenum carbide; nanostructures; nickel doping;

    机译:电殖分析;氢气进化反应;碳化钼;纳米结构;镍掺杂;

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