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首页> 外文期刊>ChemPlusChem >Nitrogen-doped Pt/C electrocatalysts with enhanced activity and stability toward the oxygen reduction reaction
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Nitrogen-doped Pt/C electrocatalysts with enhanced activity and stability toward the oxygen reduction reaction

机译：具有增强的活性和稳定性的氮气掺杂的Pt / C电催化剂对氧还原反应的稳定性

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摘要

Recently, nitrogen-doped carbon materials have proved to be effective catalytic platforms for the oxygen reduction reaction (ORR). Despite the recent synthetic advances for the preparation of nitrogen-incorporated carbon materials, the low-temperature and water-based synthesis of nitrogen-doped carbon materials has rarely been explored due to the difficulties in nitrogen-doping under such mild conditions. Here, nitrogen-doped Pt/C (Pt/NC) catalysts are prepared using a facile, low-temperature, aqueous-phase method. Hydrazine treatment of a Pt/C catalyst successfully yields Pt/NC with controlled nitrogen content. The as-prepared Pt/NC catalysts exhibit enhanced electrocatalytic activity and stability toward ORR in comparison to nitrogen-free Pt/C, and their ORR activities are highly dependent on the level of nitrogen-doping. The Pt/NC catalyst containing 2.0a at % nitrogen results in the largest improvement of ORR activity. It's all about the levels: Hydrazine treatment of a Pt/C catalyst successfully yielded nitrogen-doped Pt/C (Pt/NC) with controlled nitrogen content. The as-prepared Pt/NC catalysts exhibited enhanced electrocatalytic activity and stability toward the oxygen reduction reaction (ORR), and the corresponding ORR activity is highly dependent on the level of nitrogen-doping (see figure; RHE=reversible hydrogen electrode).
机译：最近，已证明氮气掺杂的碳材料是用于氧还原反应（ORR）的有效催化平台。尽管最近制备氮气掺入碳材料的合成进展，但由于在这种温和条件下的氮气掺杂困难，很少探讨氮掺杂碳材料的低温和水基合成。这里，使用容易，低温，水相法制备氮掺杂的Pt / C（Pt / NC）催化剂。 PT / C催化剂的肼处理成功产生Pt / Nc，具有受控氮含量。与无氮PT / C相比，AS制备的PT / NC催化剂表现出增强的电催化活性和稳定性，并且它们的ORR活性高度依赖于氮掺杂的水平。含有2.0A的PT / NC催化剂在％氮气中导致最大的ORR活性改善。这一切都关于水平：PT / C催化剂的肼处理成功地产生氮掺杂的Pt / C（Pt / NC），具有受控氮含量。制备的Pt / Nc催化剂表现出增强的电催化活性和朝向氧还原反应（ORR）的稳定性，并且相应的ORR活性高度依赖于氮掺杂水平（见图; RHE =可逆氢电极）。

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  • 来源
    《ChemPlusChem》 |2013年第10期|共6页
  • 作者

    ChoiS.-I.; LeeS.-U.; ChoiR.; ParkJ.T.; HanS.W.;

  • 作者单位

    Department of Chemistry and KI for the NanoCentury Korean Advanced Institute of Science and;

    Department of Chemistry and KI for the NanoCentury Korean Advanced Institute of Science and;

    Department of Chemistry and KI for the NanoCentury Korean Advanced Institute of Science and;

    Department of Chemistry and KI for the NanoCentury Korean Advanced Institute of Science and;

    Department of Chemistry and KI for the NanoCentury Korean Advanced Institute of Science and;

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

    electrocatalysis; fuel cells; nitrogen-doping; oxygen reduction reaction; platinum;

    机译：电催化;燃料电池;氮掺杂;氧还原反应;铂;

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