Hydrogen Sensing and Theoretical Understanding of Absorption Phenomena for Materials

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  • YAKABE Taro
    Natilnal Institute for Materials Science, RCAMC
  • IMAMURA Gaku
    Natilnal Institute for Materials Science, MANA Graduate School of Information Science and Technology, Osaka University
  • YOSHIKAWA Genki
    Natilnal Institute for Materials Science, RCFM Materials Science and Engineering, Graduate School of Pure and Applied Science, University of Tsukuba
  • MIYAUCHI Naoya
    Natilnal Institute for Materials Science, RCAMC Natilnal Institute for Materials Science, Materials Analysis St.
  • KITAJIMA Masahiro
    Natilnal Institute for Materials Science, RCAMC
  • ITAKURA Akiko N.
    Natilnal Institute for Materials Science, RCAMC

Bibliographic Information

Other Title
  • 水素センシングおよび物質への吸蔵現象の理論的解釈
  • スイソ センシング オヨビ ブッシツ エ ノ キュウゾウ ゲンショウ ノ リロンテキ カイシャク

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Abstract

<p>This report introduces hydrogen sensing with Membrane-type Surface stress Sensor (MSS) coated with two kinds of hydrogen adsorbent materials : Pd and PdCuSi. The equilibrium hydrogen pressure can be measured by detecting surface stress associated with a volume change of the material caused by hydrogen absorption. For Pd on MSS, it takes a long time for the hydrogen absorption reaction to reach saturation. However, it is possible to shorten the determination time by using the initial absorption rate as an index. As for PdCuSi on MSS, it needs a short time to reach saturation. We show that the relationship between the hydrogen concentration and the respective index of the absorption rate or the saturation value of the absorption can be well explained by using a 2-step reaction kinetic model for hydrogen absorption into bulk via adsorption on surface.</p>

Journal

  • Vacuum and Surface Science

    Vacuum and Surface Science 66 (2), 114-119, 2023-02-10

    The Japan Society of Vacuum and Surface Science

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