Abstract
The performance of La 2-xM x CuO 4 perovskites (where M = Ce, Ca or Sr) as catalysts for the water-gas shift reaction was investigated at 290 °C and 360 °C. The catalysts were characterized by EDS, XRD, N 2 adsorption-desorption, XPS and XANES. The XRD results showed that all the perovskites exhibited a single phase (the presence of perovskite structure), suggesting the incorporation of metals in the perovskite structure. The XPS and XANES results showed the presence of Cu 2+ on the surface. The perovskites that exhibited the best catalytic performance were La 2- x Ce x CuO 4 perovskites, with CO conversions of 85%–90%. Moreover, these perovskites have higher surface areas and larger amounts of Cu on the surface. And Ce has a higher filled energy level than the other metals, increasing the energy of the valence band of Ce and providing more electrons for the reaction. Besides, the La 1.80Ca 0.20CuO 4 perovskite showed a good catalytic performance.
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.
