Abstract
Symmetric solid oxide electrolysis cells (SSOECs) have attracted considerable interest because of their low fabrication cost and few compatibility issues. However, the development of SSOECs is restricted by the lack of electrode materials with desirable catalytic activity and stability. Herein, novel double-perovskite Sr2Ti1−xFeNixO6 (STFNx) oxides are prepared and evaluated as electrodes for CO2 electrolysis in SSOECs. The Sr2Ti0.9FeNi0.1O6 (STFNi01) electrode shows the best performance with the minimum polarization resistance. The physicochemical characterization reveals that Ni substitution increases the concentrations of surface-adsorbed oxygen species and electrical conductivity and enhances CO2 chemical adsorption, improving the electrode surface reaction kinetics, as evidenced by the distribution of relaxation time analysis. The STFNi01 symmetric cell presents a current density of 0.91 A cm−2 at 1.6 V and 800 °C and shows no performance degradation in the durability test due to the excellent carbon deposition resistance, indicating that STFNi01 is a promising electrode material for SSOECs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
