Synergistic effect of A-site deficiency and exsolved Fe particles in Sr1−xFeO3−δ cathodes for enhanced CO2 electroreduction in solid oxide electrolysis cells

Abstract

This study investigated SrFeO₃-based perovskite materials with A-site deficiencies for the electrolysis of CO₂. Sr_0.85FeO_3−δ exhibits enhanced capabilities of CO₂ adsorption, dissociation, and CO desorption, as well as strong resistance to carbon deposition. Incorporating Fe nanoparticles further improved the electrochemical performance, achieving 0.62 A cm⁻² under circumstances of 1.8 V and 850 °C with exceptional stability.