Abstract
The suppression of the CO oxidation activity by SO 2 treatment in Au/TiO 2 catalyst was investigated by means of reaction experiments, in situ IR and XPS. The CO oxidation activity over Au/TiO 2 catalyst decreased after SO 2 treatment. The oxidation state of Au particles did not change after SO 2 treatment. The XP spectra in the S 2p region showed that sulfate was formed on TiO 2 supports after SO 2 treatment. The IR experiment revealed that SO 2 treatment increased the adsorption strength between Au and CO. Carbonate peak was absent for the SO 2-pretreated sample in the presence of CO. The migration of CO was completely blocked by surface sulfate compound. Strong and irreversible formation of sulfate at the perimeter is the main reason of the loss of CO oxidation activity at low temperature CO oxidation.
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.
