Hydrogen diffusion through Ru thin films

O. Soroka, J. M. Sturm, C. J. Lee, H. Schreuders, B. Dam, F. Bijkerk

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1 Citation (Scopus)

Abstract

In this paper, an experimental measurement of the diffusion constant of hydrogen in ruthenium is presented. By using a hydrogen indicative Y layer, placed under the Ru layer, the hydrogen flux through Ru was obtained by measuring the optical changes in the Y layer. We use optical transmission measurements to obtain the hydrogenation rate of Y in a temperature range from room temperature to 100 °C. We show that the measured hydrogenation rate is limited mainly by the hydrogen diffusion in Ru. These measurements were used to estimate the diffusion coefficient, D, and activation energy of hydrogen diffusion in Ru thin films to be D = 5.9 × 10−14 m2/s ∙ exp (-0.33 eV/kBτ), with kB the Boltzmann constant and τ the temperature.

Original languageEnglish
Pages (from-to)15003-15010
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number29
DOIs
Publication statusPublished - 2020

Keywords

  • Activation energy
  • Hydrogen diffusion
  • Optical transmission
  • Ruthenium
  • Yttrium

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