Abstract
SrTi1-xFexO3-δ (STF) has shown promise as a fuel electrode, and as a basis for fuel electrodes with catalytically active nanoparticle exsolution. This study aims to determine trends in performance and stability of STF in highly reducing environments as Fe-content is varied from x = 0.5 to 0.8. Here we report that, while polarization resistance of STF fuel electrodes decreases with higher Fe-content, this is accompanied with lower stability in highly reducing conditions. For too-reducing conditions and too-high x, partial decomposition of the original perovskite phase is observed with the formation of metallic Fe and a Ruddlesden-Popper STF phase.
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