Dynamics of oxygen scattering on ionomer surface in catalyst layer of pefc

M. Nakauchi, T. Mabuchi, I. Kinefuchi, H. Takeuchi, T. Tokumasu

研究成果: Conference contribution

抄録

Molecular dynamics simulations have been performed to clarify the scattering phenomena of oxygen molecules on ionomer thin films, which affect the transport resistance of oxygen in catalyst layers in polymer electrolyte fuel cells. We have evaluated the probability density functions of the translational energy and scattering angle of scattered molecules, and the residence time of oxygen molecules on the ionomer surface. It was found that the energy distributions of scattered oxygen molecules depend on the incident energy and differ from that of thermally equilibrated molecules. On the other hand, the angular distributions are independent of the incident energy, and well reproduced by the diffusive scattering model. These results indicate that oxygen molecules do not accommodate completely with ionomer surface during the collision. We also evaluated the trapping dynamics of oxygen molecules on the ionomer surface in the trajectory calculations. Increasing the normal component of the incident energy results in the longer residence time on the ionomer surface.

本文言語English
ホスト出版物のタイトル16th International Conference on Nanotechnology - IEEE NANO 2016
出版社Institute of Electrical and Electronics Engineers Inc.
ページ218-221
ページ数4
ISBN(電子版)9781509039142
DOI
出版ステータスPublished - 2016 11 21
イベント16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 - Sendai, Japan
継続期間: 2016 8 222016 8 25

出版物シリーズ

名前16th International Conference on Nanotechnology - IEEE NANO 2016

Other

Other16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
CountryJapan
CitySendai
Period16/8/2216/8/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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