Microstructure-scaled active sites imaging of a solid oxide fuel cell composite cathode

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  • Additional Information
    • Publication Information:
      Elsevier BV, 2017.
    • Publication Date:
      2017
    • Abstract:
      Active sites for oxygen reduction reaction in strontium-doped lanthanum manganite (LSM)/scandia-stabilized zirconia (ScSZ) composite cathode of solid oxide fuel cell (SOFC) is visualized in microstructure scale by oxygen isotope labeling. In order to quench a reaction, a SOFC power generation equipment with a nozzle for direct helium gas impinging jet to the cell is prepared. A typical electrolyte-supported cell is operated by supplying 18 O 2 at 1073 K and abruptly quenched to room temperature. During the quench, the temperature of the cell is decreased from 1073 K to 673 K in 1 s. The 18 O concentration distribution in the cross section of the quenched cathode is obtained by secondary ion mass spectrometry (SIMS) with a spatial resolution of 50 nm. The obtained 18 O mapping gives the first visualization of highly distributed active sites in the composite cathode both in macroscopic and particle scales.
    • ISSN:
      0378-7753
    • Online Access:
      https://explore.openaire.eu/search/publication?articleId=doi_dedup___::542eed7b1307f5389ab8d46612b93d97
      https://api.elsevier.com/content/article/PII:S0378775317312016?httpAccept=text/xml
    • Rights:
      CLOSED
    • Accession Number:
      edsair.doi.dedup.....542eed7b1307f5389ab8d46612b93d97