A vanadium-doped BSCF perovskite for CO2 electrolysis in solid oxide electrolysis cells

CO 2 electrolysis through solid oxide electrolysis cells (SOECs) is a promising strategy for converting CO 2 to useful fuels and chemicals powered by renewable energy. Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) is a widely-investigated anode material of SOEC on account of its high and catalytic activity . However, its poor stability under CO 2 atmosphere limits its application as cathode in CO 2 electrolysis. Herein, we develop a vanadium-doped BSCF material Ba 0.5 Sr 0.5 (Co 0.8 Fe 0.2 ) 1-x V x O 3-δ (BSCFV x ) for SOEC cathode. The doping of V into B site of BSCF decreases the basicity of perovskite oxide and increases its stability under CO 2 atmosphere, thus improving the CO 2 electrolysis performance. Compared to BSCF, the cell of BSCFV 0.01 cathode shows a better tolerance to CO 2 and achieves 48.3% increase in current density at 1.6 V and 800 °C.