In Situ Exsolved NiFe/(NiFe)Ox Core–Shell-Structured Nanocatalysts on Perovskite Anode with Enhanced Coking Resistance

A solid oxide fuel cell (SOFC) anode consisting of a NiFe bimetal alloy/(NiFe)Ox (NFA/NFO) core–shell-structured nanocatalyst-decorated ceramic substrate was fabricated by in situ reduction of A-site deficient cubic perovskite (Ba0.2Sr0.8)0.9Ni0.07Fe0.63Mo0.3O3-δ (BSNFM) in wet H2 at 800 °C. The BSNFM-NFA/NFO ceramic anode exhibits an excellent catalytic activity toward H2 and hydrocarbon fuels. The La0.8Sr0.2Ga0.83Mg0.17O3-δ (LSGM) electrolyte-supported SOFC single cell with a BSNFM-NFA/NFO anode delivers a Pmax of 1099 mW cm–2 in wet H2 at 800 °C and 1049 mW cm–2 in wet C3H8 at 850 °C, respectively. Moreover, the single cell with a BSNFM-NFA/NFO anode showed a stable output under a constant current density of 1.0 A cm–2 at 750 °C in C3H8 fuel, suggesting that BSNFM-NFA/NFO is a promising anode with outstanding coking resistance.