...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrochimica Acta >Influence of Nafion film on oxygen reduction reaction and hydrogen peroxide formation on Pt electrode for proton exchange membrane fuel cell
【24h】

Influence of Nafion film on oxygen reduction reaction and hydrogen peroxide formation on Pt electrode for proton exchange membrane fuel cell

机译：Nafion膜对质子交换膜燃料电池Pt电极上氧还原反应和过氧化氢形成的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The influence of Nafion film on ORR kinetics and H_2O_2 formation on a Pt electrode was investigated using RRDE in 0.1 M HClO_4. It was found that the Nafion-coated Pt system showed lower apparent ORR activity and more H_2O_2 production than the bare Pt electrode system. From the temperature sensitivity, it was revealed that the apparent activation energies of ORR in the Nafion-coated Pt system were lower than the bare Pt electrode system, and the H_2O_2 formation was suppressed with the increase of the temperature. In order to analyze the results furthermore, other systems (0.1/1.0 M, HClO_4/CF_3SO_3H) with the bare Pt electrodes were also examined as references. It was exhibited that the ORR kinetic current, the H_2O_2 formation, and the apparent activation energies of 1.0 M CF_3SO_3H system were close to those of the Nafion-coated Pt system. We concluded that the orientation of anion species of Nafion and CF_3SO_3H to the Pt surface via water molecules, as well as a fluorocarbon polymer network of Nafion, might block O_2 adsorption, resulting in the smaller effective surface area of the Pt electrode for ORR, the smaller ORR kinetic current, and the more H_2O_2 production.
机译：在0.1 M HClO_4中，使用RRDE研究了Nafion膜对Pt电极上ORR动力学和H_2O_2形成的影响。研究发现，与裸露的Pt电极体系相比，Nafion涂层的Pt体系表现出较低的表观ORR活性和更多的H_2O_2产生。从温度敏感性可以看出，Nafion包覆的Pt体系中ORR的表观活化能比裸露的Pt电极体系低，并且随着温度的升高H_2O_2的形成受到抑制。为了进一步分析结果，还检查了带有裸露Pt电极的其他系统（0.1 / 1.0 M，HClO_4 / CF_3SO_3H）。结果表明，1.0 M CF_3SO_3H体系的ORR动电流，H_2O_2的形成和表观活化能与Nafion涂层Pt体系的接近。我们得出的结论是，Nafion和CF_3SO_3H的阴离子物种通过水分子以及Nafion的碳氟聚合物网络向Pt表面定向可能会阻止O_2吸附，从而导致Pt电极对ORR的有效表面积较小，即ORR动电流越小，产生的H_2O_2越多。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号