Add time:08/12/2019         Source:sciencedirect.com

The deactivation upon oxidative treatments of solid oxide fuel cell (SOFC) anodes based on La0.7Sr0.3VO3.85 with a Pd/ceria catalyst is examined using electrodes formed by infiltration of La0.7Sr0.3VO3.85, Pd, and ceria into porous yttria-stabilized zirconia (YSZ). Based on XRD results, performance measurements of cells made with varying La:Sr:V ratios, and Pd dispersion measurements using CO adsorption, we conclude that La0.7Sr0.3VO3.85 is kinetically unstable upon reduction-oxidation treatments at 973 K, forming molten, strontium–vanadate phases that partially cover the catalytic component. Deactivation can be minimized using V-deficient compositions.

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