Structure and Stability of Pt-Y Alloy Particles for Oxygen Reduction Studied by Electron Microscopy

Davide Deiana (Invited author), Jakob Birkedal Wagner (Invited author), Thomas Willum Hansen (Invited author)

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Platinum-yttrium alloy nanoparticles show both a high activity and stability for the oxygen reduction reaction. The catalysts were prepared by magnetron sputter aggregation and mass filtration providing a model catalyst system with a narrow size distribution. The structure and stability of nanostructured Pt-Y alloy catalysts were studied using transmission electron microscopy techniques. Using elemental X-ray mapping and high-resolution electron microscopy, the specific compositional structure and distribution of the individual nanoparticles was unraveled and the stability assessed. Studying the catalyst after reaction and after aging tests shows the development of a core-shell type structure after being exposed to reaction conditions.
    Original languageEnglish
    JournalE C S Transactions
    Volume66
    Issue number2
    Pages (from-to)115-127
    ISSN1938-5862
    DOIs
    Publication statusPublished - 2015
    Event227th ECS Meeting - Chicago, IL, United States
    Duration: 24 May 201528 May 2015

    Conference

    Conference227th ECS Meeting
    CountryUnited States
    CityChicago, IL
    Period24/05/201528/05/2015

    Keywords

    • Oxygen Electrodes II - May 26 2015 8:00AM

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