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首页> 外文期刊>Journal of power sources >Identical locations transmission electron microscopy study of Pt/C electrocatalyst degradation during oxygen reduction reaction
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Identical locations transmission electron microscopy study of Pt/C electrocatalyst degradation during oxygen reduction reaction

机译：氧还原反应过程中Pt / C电催化剂降解的相同位置的透射电子显微镜研究

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摘要

The degradation mechanisms of Pt nanoparticles supported on Carbon have been characterized during oxygen reduction reaction (ORR) conditions using IL-TEM. A TEM grid is used as the sole working electrode allowing a direct correlation between the electrochemical response and the TEM analysis. We mainly observe a decrease in nanoparticle size with some particle disappearance and some particle sintering after potential cycling simulating the start-up and shut-down of a fuel cell. The observation of nanoparticles with reduced particle size provides evidence that dissolution phenomena are the main cause of degradation in Pt/C electrocatalysts, under ORR conditions.
机译：使用IL-TEM在氧还原反应（ORR）条件下表征了载于碳上的Pt纳米颗粒的降解机理。 TEM栅格用作唯一的工作电极，可在电化学响应和TEM分析之间建立直接关联。我们主要观察到在模拟燃料电池的启动和关闭的潜在循环后，纳米粒子尺寸的减小，其中一些粒子消失并且一些粒子烧结。对具有减小的粒径的纳米颗粒的观察提供了证据，即溶解现象是在ORR条件下Pt / C电催化剂降解的主要原因。

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  • 来源
    《Journal of power sources》 |2011年第15期|p.6085-6091|共7页
  • 作者

    FranciscoJ.Perez-Alonso; ChristianF. Elkjaer; SigneS.Shim; BillieL Abrams; Ifan E.LStephens; Ib Chorkendorff;

  • 作者单位

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark;

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark;

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark,IRD Fuel Cells A/S, Kullinggade 31, DK-5700 Svendborg, Denmark;

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark;

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark;

    Center for Individual Nanoparticle Functionality, Department of Physics. Building 312, Technical University of Denmark, DK-2800 Lyngby, Denmark;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    oxygen reduction; identical locations transmission electron; microscopy; platinum; corrosion; fuel cell;

    机译：氧气还原相同位置传输电子;显微镜铂;腐蚀;燃料电池;

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