Abstract
Transference of CuO species and thermal solid-solid interaction in CuO/CeO 2-Al 2O 3 catalyst prepared by an impregnation method were characterized by in-situ XRD, Raman spectroscopy and H 2-TPR techniques. For the catalyst calcined at 300 °C, two kinds of CuO species coexist on the surface, that is, highly dispersed and bulk CuO crystalline phase. Four kinds of CuO species are present for the catalyst calcined at 600 °C: (1) highly dispersed CuO, (2) bulk CuO on the surface, (3) bulk CuO in the internal layer of CeO 2, and (4) CuAl 2O 4 formed from CuO-Al 2O 3 interaction. For the catalyst calcined at 800 °C, besides very little highly dispersed and bulk CuO on the surface, most of the CuO has transferred into the internal layer of CeO 2 and the mass of CuAl 2O 4 are increased. At 900 °C, all of CuO has diffused into the internal layer of CeO 2 and formed CuAl 2O 4. The results show that the distribution of CuO species in the catalysts depends on the calcination temperature; the different CuO species can be effectively confirmed by ia-situ XRD, Raman spectroscopy and H 2-TPR techniques.
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.
