Time-phase-controlled exsolution of FeCoNi ternary alloy nanoparticles on perovskite anode catalyst for enhanced dual-functional catalysis and protection in ammonia-fueled protonic ceramic fuel cells

We present a novel exsolution strategy to fabricate a Sr 2 Fe 1.5 Mo 0.35 Co 0.1 Ni 0.05 O 6− δ perovskite anode catalytic layer, with in situ formation of FeCoNi alloy nanoparticles with enhanced catalytic activity for ammonia decomposition and durability.