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首页> 外文期刊>Journal of power sources >Effect of high oxygen reduction reaction activity of octahedral PtNi nanoparticle electrocatalysts on proton exchange membrane fuel cell performance
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Effect of high oxygen reduction reaction activity of octahedral PtNi nanoparticle electrocatalysts on proton exchange membrane fuel cell performance

机译：八面体PtNi纳米粒子电催化剂高氧还原反应活性对质子交换膜燃料电池性能的影响

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摘要

To reduce Pt loading in proton exchange membrane (PEM) fuel cells, we synthesized (111) faceted octahedral PtNi nanoparticles supported by carbon black (octahedral PtNi NPs/C) using a new chemical method, and evaluated the effect of reduction of Pt loading and durability in actual PEM fuel cells. We confirmed that the synthesized particles were octahedral and the PtNi alloy nanoparticles had a size of 10-15 nm. In high resolution transmission electron microscopy analysis, nearly all exposed surfaces of the octahedral PtNi NPs were identified as (111) facets. Energy dispersion X-ray spectroscopy analysis showed that the corners and edges of the octahedral PtNi NPs were richer in platinum than the internal region, thus it was determined that the octahedral PtNi NPs adopted a core -shell structure. Mass activity of octahedral PtNi NPs/C as a cathode in fuel cells was 3.4 times higher than that of commercial Pt catalysts. This corresponds to a 71% reduction of Pt for the cathode. In potential cycling tests, the octahedral PtNi NPs/C also exhibited better durability than the commercial Pt catalysts.
机译：为了减少质子交换膜（PEM）燃料电池中的Pt负载，我们使用一种新的化学方法合成了（111）炭黑负载的多面八面体PtNi纳米颗粒（八面体PtNi NPs / C），并评估了降低Pt负载和实际PEM燃料电池的耐久性。我们确认合成的颗粒为八面体，PtNi合金纳米颗粒的尺寸为10-15 nm。在高分辨率透射电子显微镜分析中，几乎所有八面体PtNi NP的暴露表面都被识别为（111）面。能量色散X射线光谱分析表明，八面体PtNi NPs的角和边缘比内部区域富含铂，因此可以确定八面体PtNi NPs采用核-壳结构。八面体PtNi NPs / C作为燃料电池阴极的质量活性是商业Pt催化剂的3.4倍。这对应于阴极的Pt降低71％。在潜在的循环测试中，八面体PtNi NPs / C也比商用Pt催化剂具有更好的耐久性。

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  • 来源
    《Journal of power sources》 |2014年第10期|117-123|共7页
  • 作者

    Ryogo Sakamoto; Kaoru Omichi; Terumi Furuta; Masao Ichikawa;

  • 作者单位

    Honda R&D Co., Ltd., Fundamental Technology Research Center, 1-4-1 Chuo, Wako-shi, Saitama, Japan;

    Honda R&D Co., Ltd., Fundamental Technology Research Center, 1-4-1 Chuo, Wako-shi, Saitama, Japan;

    Honda R&D Co., Ltd., Fundamental Technology Research Center, 1-4-1 Chuo, Wako-shi, Saitama, Japan;

    Honda R&D Co., Ltd., Fundamental Technology Research Center, 1-4-1 Chuo, Wako-shi, Saitama, Japan;

  • 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

    PEM fuel cell; Electrocatalysts; Octahedral PtNi nanoparticles; Oxygen reduction reaction;

    机译：PEM燃料电池;电催化剂;八面体PtNi纳米颗粒;氧还原反应;

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