Abstract
The present work investigates the effect of CO on NO reduction during the rich period over Pt/Pd-based NSR catalysts at low temperature. Three types of reducing agents (CO and/or H2) are used in this research. BET and XRD are used to determine physical properties, and in situ DRIFTS explore the competitive adsorption of NO–CO and the strength of CO adsorption on the noble metal component. It is found that NO is completely reduced over Pt/Pd-based catalysts at 150 °C when H2 is the reducing agent, while there is NO emission phenomenon when CO is the reducing agent. When H2 and CO are reductants together, catalysts with/without Pd exhibit different NO reduction activity. In situ DRIFTS results show that there is a competitive adsorption of NO and CO on Pt/Al2O3 and Pd/Al2O3, and Pt/Al2O3 presents stronger CO adsorption in comparison with Pd/Al2O3. It is probable that the NO reduction is related to CO adsorption on the noble metal component. The adsorption strength of CO on Pt/Pd-based catalysts affects the NO reduction performance during the rich period.
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 callSimilar Papers
More From: Catalysis Science & Technology
Disclaimer: 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.
