A novel symmetrical cell was prepared by facile tape-casting and infiltration methods. The cell is ideal for CO₂ electrolysis, achieving a current density of 1.24 A cm⁻², which could be attributed to the significantly extended active sites resulting from novel architectures with infiltrated Sr₂FeMoO₆ (SFM) nano-networks. The combined strategy appears to be a promising approach to produce unique architectures for CO₂ electrolysis with solid oxide electrolysis cells (SOECs).

Sodium doping increases oxygen vacancy concentration, modulates the electronic structure, and improves CO₂ chemical adsorption, enabling superior CO₂/CO reversible conversion.