Voltage-driven exsolution of Cu nanoparticles from Sr 0.9 Ti 0.45 Fe 0.4 W 0.05 Cu 0.1 O 3− δ for enhanced CO 2 electrolysis in solid oxide electrolysis cells

is achieved at 850 °C and 1.8 V. In addition, the electrode demonstrates excellent resistance to carbon deposition together with good short-term operational stability.