Abstract
Solid Oxide Cell electrode engineering is of paramount importance to obtain high performing, versatile and reliable devices. In this work, the structural and morphological evolution of Sr2FeNi0.4Mo0.6O6-δ (SFNM) is investigated and fully characterized over subsequent temperature programmed reductions. Comparison of the results of X-ray diffraction, high transmission electron microscopy and electrochemical impedance spectroscopy analyses confirms how metallic phase exsolution upon reduction endows the perovskite with highly active Ni-Fe-based catalytic sites for applications in hydrogen-fueled SOFCs. As a novelty, this study presents voltage-induced reduction of SFNM at 1.6 V as a fast and reliable way to induce morphological and structural changes of the SFMN-derivate exsolved-perovskite. This enhances its catalytic activity towards CO2 electrolysis in SOEC configuration, providing SFNM with a high versatility in solid oxide cells applications.
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