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High-performance yttrium-iron alloy doped Pt-free catalysts on graphene for hydrogen evolution

机译：高性能的钇 - 铁合金掺杂在石墨烯上的Pt-Faints催化剂用于氢气进化

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摘要

Research into the preparation and application of metal/graphene nanocomposite materials is an important issue in the field of graphene applications. Metal nanomaterials and graphene materials have many excellent properties and have been perfectly combined into metal/graphene nanocomposite materials. These offer the high catalytic activity of metal nanomaterials and the high specific surface area and favorable electrical conductivity of graphene. The unique advantages can produce synergistic effects and can significantly improve the overall performance of the composite materials. This gives the metal/graphene nanocomposite materials excellent application prospects for hydrogen evolution. Here, we report the preparation of yttrium-doped palladium/iron on graphene (Pd/YFeO3/C-G) using a simple and efficient method. The catalytic performance of the Pd/YFeO3/C-G nanocomposites for water electrolysis and hydrogen production was evaluated. The results show that the overpotential for the hydrogen evolution reaction at -10 mA cm(-2) is only 15 mV, which is competitive with Pt/C catalysts. The Pd/YFeO3/C-G is highly active for hydrogen evolution with an onset potential of -8 mV in 0.5 M H2SO4 solution and a Tafel slope of 37 mV dec(-1) with a Pd loading of only 20 g(Pd) cm(-2). These results clearly demonstrated that Pd/YFeO3/C-G is an excellent catalyst for hydrogen evolution.
机译：金属/石墨烯纳米复合材料的制备和应用研究是石墨烯应用领域的重要问题。金属纳米材料和石墨烯材料具有许多优异的性能，并完全合并成金属/石墨烯纳米复合材料。这些提供了金属纳米材料的高催化活性和高比表面积和石墨烯的良好导电性。独特的优点可以产生协同效果，可以显着提高复合材料的整体性能。这为金属/石墨烯纳米复合材料提供了氢进化的优异应用前景。在这里，我们使用简单且有效的方法报告在石墨烯（Pd / YFeO 3 / C-G）上制备钇掺杂的钯/铁。评价Pd / YFeO 3 / C-G纳米复合材料的催化性能进行水电解和氢气产生。结果表明，-10mA cm（-2）的氢进化反应的过电位仅为15mV，与Pt / C催化剂具有竞争力。 Pd / YfeO 3 / Cg对于氢气进化，对于0.5M H 2 SO 4溶液的起始电位和37mV DEC（-1）的Tafel斜率，具有仅20g（Pd）cm（ -2）。这些结果清楚地证明Pd / YfeO 3 / C-g是氢进化的优异催化剂。

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  • 来源
    《RSC Advances》 |2018年第71期|共7页
  • 作者

    Zhu Pengcheng; Lyu Dandan; Shen Pei Kang;

  • 作者单位

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning 530004 Peoples R China;

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning 530004 Peoples R China;

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning 530004 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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