Development of new kinetic Monte Carlo simulator for hydrogen diffusion process in palladium-silver alloys

Hitoshi Kurokawa, Kazunori Bada, Michihisa Koyama, Momoji Kubo, Akira Miyamoto

    Research output: Contribution to journalConference articlepeer-review

    10 Citations (Scopus)

    Abstract

    A novel kinetic Monte Carlo simulator "ARC" was developed to investigate hydrogen diffusion process in metals and alloys. The results of the hydrogen diffusion coefficients in palladium, silver, and Pd 1-x Ag x (x ≤ 0.5) are in excellent agreement with experimental results. Two different diffusion sites, Pd-rich diffusion site and Ag-rich diffusion site, are found to be necessary to explain diffusion behaviors of hydrogen in palladium-silver alloys. Detailed analysis clarified that hydrogen atoms preferentially diffuse through the palladium-rich region of palladium-silver alloys at low silver concentrations, and that the hydrogen diffusion process at low silver contents is dominated by the jumps in palladium-rich regions. The migration barrier of hydrogen from Pd-rich diffusion site to Ag-rich diffusion site is estimated to be between 0.40 and 0.45 eV.

    Original languageEnglish
    Pages (from-to)636-639
    Number of pages4
    JournalApplied Surface Science
    Volume244
    Issue number1-4
    DOIs
    Publication statusPublished - May 15 2005
    Event12th International Conference on Solid Films and Surfaces - Hammatsu, Japan
    Duration: Jun 21 2004Jun 25 2004

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Condensed Matter Physics
    • Physics and Astronomy(all)
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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