First-principles study of oxygen coverage effect on hydrogen oxidation on Ni(1 1 1) surface

Shixue Liu, Takayoshi Ishimoto, Michihisa Koyama

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    The anodic oxidation reactions of solid oxide fuel cells are studied by density functional theory method under different oxygen coverage on the Ni(1 1 1) surface. Co-adsorbed atoms can change the binding energy of adsorbed species, and then affect the reaction barriers. We analyze the detailed structures and atomic charges to explain the mechanism of oxygen coverage effect. Our results indicate that higher oxygen coverage (in the range between 0 and 2/9) leads to lower oxidation reaction barriers. The main reason of the effect is the charge transfer between species and Ni surface was changed by the electron acceptor of co-adsorbed oxygen atoms.

    Original languageEnglish
    Pages (from-to)86-91
    Number of pages6
    JournalApplied Surface Science
    Volume333
    DOIs
    Publication statusPublished - Apr 1 2015

    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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