Under conditions with 10% C3H8/Ar and 10% CO2/Ar in the anode and cathode, respectively, propane conversion reached 78% at 800 °C (Figure ). C3H6 selectivity peaked at 35% at 650 °C, while C2H4 selectivity was maximized at 32% at 800 °C, with C2H4 selectivity declining with lower temperatures (Figure ). The optimal current density at 650 °C was determined to be 200 mA cm⁻², yielding a C3H6 selectivity of 41% and an olefin selectivity of 80% (Figure ), alongside the highest olefin yield (Figure ). A continuous increase in the C2H4 production rate under high current densities (Figure ), coupled with a peak in C3H6 production rate at 200 mA cm⁻² (Figure ), suggests slower reaction kinetics for C3H6 production compared to C2H4. Enhanced oxygen ion pumping to the anode at higher current densities aligns with the rate of C2H4 production but does not correspond with the rate of C3H6 production. The SOER using FNR@FeOx core-shell nanoparticles maintained stable operation over 150 h for simultaneous propylene production and CO2 reduction at a current density of 400 mA cm⁻² and 600 °C (Figure ). These results demonstrate the effectiveness and stability of core-shell nanoparticle-enhanced SOERs for CO2 conversion and propylene production.