Abstract
Structural and microstructural investigations of Pd-doped lanthanum strontium ferrite with stoichiometry La0.6Sr0.4Fe0.9Pd0.1O3-δ (LSFPd) were carried out under oxidizing and reducing conditions. LSFPd exhibited a smart behavior with a reversible redox structural transformation occurring upon switching from air to hydrogen and then back to air. Exsolution of nanometric metal particles was observed after reduction, and re-incorporation of metal cations onto the perovskite structure was confirmed after re-oxidation. The electrochemical performances were evaluated on electrolyte supported cells using LSFPd as symmetric electrodes and La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) as electrolyte. Fuel cell tests revealed promising performance in H2.
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