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) was visualized in particle scale by oxygen isotope labeling. In order to quench a reaction, a SOFC power generation equipment with a nozzle for direct helium impinging jet to the cell was prepared. A typical electrolyte-supported cell was operated by supplying 18O2 at 1073 K and abruptly quenched to room temperature. During the quench, the temperature of the cell was decreased from 1073 K to 673 K in 1 sec. The 18O concentration distribution in the cross section of the quenched cathode was obtained by secondary ion mass spectrometry (SIMS) with a spatial resolution of 50 nm. The obtained 18O concentration mapping gives the inhomogeneous distribution of active sites in the composite cathode.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.