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首页> 外文期刊>RSC Advances >Enhanced electrocatalytic activity and durability of highly monodisperse Pt@PPy-PANI nanocomposites as a novel catalyst for the electro-oxidation of methanol
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Enhanced electrocatalytic activity and durability of highly monodisperse Pt@PPy-PANI nanocomposites as a novel catalyst for the electro-oxidation of methanol

机译：高度单分散Pt @ Ppy-Pani纳米复合材料的电催化活性和耐久性作为用于甲醇电氧化的新型催化剂

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摘要

Highly monodisperse Pt nanocomposites (Pt@ PPy-PANI NPs) supported on polypyrrole (PPy)-polyaniline (PANI) have been successfully synthesized for the first time by a simple one-pot process, which involves the simultaneous reduction of the conducting polypyrrole (PPy)-polyaniline (PANI) and Pt precursors using DMAB (dimethylamine borane) as a reductant under ultrasonic conditions. Pt@ PPy-PANI NPs have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). All the results show that highly crystalline and stable colloidal Pt@ PPy-PANI NPs have been formed as one of the most active and long-lived catalysts with superior reusability performance for the electro-oxidation of methanol at room temperature. Compared to PPy or PANI supported Pt nanoparticles, Pt@ PPy-PANI NPs exhibit extraordinary electrocatalytic activity and stability toward the electro-oxidation of methanol, showing their potential use as a new electrode material for direct methanol fuel cells (DMFCs). It should be primarily attributed to the PPy-PANI, which not only provided larger surface area and flaws for the deposition of Pt nanoparticles, but also the adsorption of more methanol molecules for further oxidation.
机译：高度单分散的Pt纳米复合材料（Pt @ ppy-pani nps）通过简单的单锅工艺首次成功地合成了聚吡咯（ppy）-polyaniline（pani），这涉及同时减少导电聚吡咯（PPY ） - 使用DMAB（二甲胺硼烷）作为超声条件下还原剂的聚苯胺（PANI）和PT前体。 PT @PPY-PANI NPS的特征在于X射线衍射（XRD），透射电子显微镜（TEM）和X射线光电子能谱（XPS）。所有结果表明，高度结晶和稳定的胶体PT @ Ppy-Pani NPS已形成为最活跃和长寿命的催化剂之一，具有优异的可再利用性能，在室温下为甲醇电氧化。与PPY或PANI负载的PT纳米颗粒相比，PT @PPY-PANI NPS表现出非凡的电催化活性和朝向甲醇电氧化的稳定性，显示它们作为用于直接甲醇燃料电池（DMFC）的新电极材料的潜在用途。它应该主要归因于PPY-PANI，其不仅提供了较大的表面积和用于沉积PT纳米颗粒的缺陷，而且还吸附更多甲醇分子以进一步氧化。

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  • 来源
    《RSC Advances》 |2016年第56期|共7页
  • 作者

    Karatepe Ozlem; Yildiz Yunus; Pamuk Handan; Eris Sinan; Dasdelen Zeynep; Sen Fatih;

  • 作者单位

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

    Dumlupinar Univ Sen Res Grp Dept Biochem Fac Arts &

    Sci EvliyaCelebi Campus TR-43100 Kutahya Turkey;

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  • 正文语种 eng
  • 中图分类 化学;
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