Abstract
The Cu- and Mn-doped ceria were prepared using the citric acid sol–gel method. The structural and redox properties of the mixed oxides were investigated by means of XRD, BET, O 2-TPD, CO-TPR and CO reduction under isothermal conditions. TPO tests were performed to evaluate the catalytic activity for soot oxidation. The results showed that Mn x+ cations entered into the ceria lattice to form solid solutions, which increased the amount of oxygen vacancies and promoted surface oxygen chemisorption. Cu x O clusters were more likely to be dispersed on the surface of ceria particles. The interaction between copper and cerium greatly enhanced the rapid release of lattice oxygen of the oxides in the reducing atmosphere. These two mixed oxides showed improved catalytic activities and selectivities to CO 2 for soot oxidation compared with pure ceria. The order of activities under different contact conditions was believed to be related to active oxygen species released by the catalysts.
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.
