Abstract
The effect of Pd loading (0.25, 0.5 and 1.0 wt%) and ZrO2 support calcined at diverse temperatures (600, 700 and 800 °C) by pyrolysis of UiO-66 was investigated for CO oxidation in this work, respectively. The physicochemical properties of the samples were characterized by various characterization methods. The XRD results exhibited that all ZrO2 support possessed mixed crystalline phase, the monoclinic ZrO2 and tetragonal ZrO2. And the calcination temperature had a big impact on the composition of ZrO2 supports. Pyrolysis of UiO-66 at high temperature was favorable for the formation of monoclinic ZrO2. Additionally, the introduction of Pd was induced the phase conversion from tetragonal to monoclinic of ZrO2. The order of catalytic efficiency was as follows: 0.5Pd/Zr-700 > 0.5Pd/Zr-600 > 0.5Pd/Zr-800. Moreover, 0.5Pd/Zr-700 presented high stability and great reusability. The good catalytic performance of 0.5Pd/Zr-700 was ascribed to the better reduction ability at low temperature and high Oads/Olat and Pd0/Pd2+ on the surface. Importantly, the reaction pathway of CO oxidation over the 0.5Pd/Zr-700 was exposed.
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.
