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首页> 外文期刊>RSC Advances >High-performance yttrium-iron alloy doped Pt-free catalysts on graphene for hydrogen evolution
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High-performance yttrium-iron alloy doped Pt-free catalysts on graphene for hydrogen evolution

机译：高性能钇铁合金掺杂石墨烯上无铂催化剂用于析氢

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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/YFeO _(3) / ~(G) C) using a simple and efficient method. The catalytic performance of the Pd/YFeO _(3) / ~(G) C 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/YFeO _(3) / ~(G) C is highly active for hydrogen evolution with an onset potential of ?8 mV in 0.5 M H _(2) SO _(4) solution and a Tafel slope of 37 mV dec ~(?1) with a Pd loading of only 20 μg _(Pd) cm ~(?2) . These results clearly demonstrated that Pd/YFeO _(3) / ~(G) C is an excellent catalyst for hydrogen evolution.
机译：金属/石墨烯纳米复合材料的制备与应用研究是石墨烯应用领域的重要课题。金属纳米材料和石墨烯材料具有许多优异的性能，并且已经完美地结合到金属/石墨烯纳米复合材料中。这些提供了金属纳米材料的高催化活性以及石墨烯的高比表面积和良好的导电性。独特的优势可以产生协同效应，并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极好的析氢应用前景。在这里，我们报告了使用简单有效的方法在石墨烯上制备钇掺杂的钯/铁（Pd / YFeO_（3）/〜（G）C）。评价了Pd / YFeO_（3）/〜（G）C纳米复合材料对水电解和制氢的催化性能。结果表明，在？10 mA cm〜（？2）处，氢气析出反应的超电势仅为15 mV，与Pt / C催化剂竞争。 Pd / YFeO _（3）/〜（G）C对氢的释放具有很高的活性，在0.5 MH _（2）SO _（4）溶液中的起始电位为？8 mV，Tafel斜率为dec〜37 mV。 （？1）的Pd负载仅为20μg_（Pd）cm〜（？2）。这些结果清楚地表明，Pd / YFeO_（3）/〜（G）C是一种极好的析氢催化剂。

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