Hydrogen diffusion through Ru thin films

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

Hydrogen diffusion through Ru thin films

Journal article (2020)

Authors

O.B. Soroka University of Twente

J.M. Sturm University of Twente

C. J. Lee Student

H. Schreuders ChemE/Afdelingsbureau

B. Dam ChemE/Chemical Engineering

F Bijkerk University of Twente

Department

ChemE/Chemical Engineering

Activation energy Hydrogen diffusion Optical transmission Ruthenium Yttrium

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Published Date

2020

Language

English

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Department

ChemE/Chemical Engineering

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/k_Bτ), with k_B the Boltzmann constant and τ the temperature.

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