Investigation of oxygen vacancies in CeO2/Pt system with synchrotron light techniques

16th International Conference on X-ray Absorption Fine Structure

Braglia, L.^1,2 ; Bugaev, A.L.^2 ; Lomachenko, K.A.^1,2 ; Soldatov, A.V.^2 ; Lamberti, C.^1,2 ; Guda, A.A.^2

Department of Chemistry, NIS and CrisDi Centers, Turin University, INSTM Reference Center, Turin

10125, Italy^1

International Research Center Smart Materials, Southern Federal University, Rostov-on-Don

344090, Russia^2

关键词: Co oxidation;    Ionic diffusion;    Reactive site;    Synchrotron light;    Temporal evolution;    Time-resolved;    XRD measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012064/pdf
DOI  :  10.1088/1742-6596/712/1/012064

来源: IOP

【 摘 要 】

A peculiar property of ceria is the ease to form oxygen vacancies, producing reactive sites or facilitating ionic diffusion. For these reasons ceria promotes catalytic activities for a number of important reactions when it is used as a support for transition metals. In our work we study the temporal evolution of oxygen vacancies formation by time-resolved XANES at Ce K- edge and XRD measurements on CeO2/Pt nanoparticles, successfully monitoring the reaction of CO oxidation.