Hollow La0.6Sr0.4Ni0.2Fe0.75Mo0.05O3-δ electrodes with exsolved FeNi3 in quasi-symmetrical solid oxide electrolysis cells for direct CO2 electrolysis

Symmetrical solid oxide electrolysis cells (Sym-SOECs) have emerged as one of the most attractive cells for direct CO 2 electrolysis owing to their structural advantages, low cost, and reversible operability. However, their practical applications are limited due to the non-availability of fuel electrode electrocatalysts with excellent performance. In this study, hollow La 0.6 Sr 0.4 Ni 0.2 Fe 0.75 Mo 0.05 O 3-δ (LSNFM) electrodes were prepared via a mild molten-salt-assisted approach. Subsequently, quasi-Sym-SOECs were constructed using LSNFM electrodes, where the cathode exsolved FeNi 3 nanoparticles to enhance CO 2 reduction performance. Compared with Sym-SOECs, the proposed quasi-Sym-SOECs show improved current density of electrolysis and reduced interfacial polarization resistance, which demonstrate the advantages of quasi-Sym-SOECs for CO 2 electrolysis.