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Large-Scale Synthesis of Carbon-Shell-Coated FeP Nanoparticles for Robust Hydrogen Evolution Reaction Electrocatalyst

机译:鲁棒的析氢反应电催化剂的大规模合成碳壳包覆的FeP纳米粒子

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摘要

A highly active and stable non-Pt electrocatalyst for hydrogen production has been pursued for a long time as an inexpensive alternative to Pt-based catalysts. Herein, we report a simple and effective approach to prepare high-performance iron phosphide (FeP) nanoparticle electrocatalysts using iron oxide nanoparticles as a precursor. A single-step heating procedure of polydopamine-coated iron oxide nanoparticles leads to both carbonization of polydopamine coating to the carbon shell and phosphidation of iron oxide to FeP, simultaneously. Carbon-shell-coated FeP nanoparticles show a low overpotential of 71 mV at 10 mA cm~(-2), which is comparable to that of a commercial Pt catalyst, and remarkable long-term durability under acidic conditions for up to 10 000 cycles with negligible activity loss. The effect of carbon shell protection was investigated both theoretically and experimentally. A density functional theory reveals that deterioration of catalytic activity of FeP is caused by surface oxidation. Extended X-ray absorption fine structure analysis combined with electrochemical test shows that carbon shell coating prevents FeP nanoparticles from oxidation, making them highly stable under hydrogen evolution reaction operation conditions. Furthermore, we demonstrate that our synthetic method is suitable for mass production, which is highly desirable for large-scale hydrogen production.
机译:作为制氢的廉价替代品,长期以来一直在寻求一种高活性且稳定的用于制氢的非铂电催化剂。本文中,我们报告了一种简单有效的方法,以氧化铁纳米粒子为前体来制备高性能的磷化铁(FeP)纳米粒子电催化剂。聚多巴胺涂覆的氧化铁纳米颗粒的单步加热程序会同时导致聚多巴胺涂层碳化到碳壳和氧化铁磷化成FeP。碳壳包覆的FeP纳米颗粒在10 mA cm〜(-2)下表现出71 mV的低过电势,可与市售Pt催化剂媲美,并且在酸性条件下具有高达10000次循环的出色长期耐久性活动损失可忽略不计。从理论上和实验上研究了碳壳保护的效果。密度泛函理论表明,FeP催化活性的下降是由表面氧化引起的。扩展的X射线吸收精细结构分析与电化学测试相结合表明,碳壳涂层可防止FeP纳米颗粒氧化,使其在氢释放反应操作条件下高度稳定。此外,我们证明了我们的合成方法适合大规模生产,这对于大规模制氢是非常需要的。

著录项

  • 来源
    《Journal of the American Chemical Society》 |2017年第19期|6669-6674|共6页
  • 作者单位

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

    Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea,School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, South Korea;

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  • 入库时间 2022-08-18 03:07:58

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