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Marked effect of In, Pb and Ce addition upon the reduction of NO by CO over SiO2 supported Pd catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
53096 46907 2007 6 PDF Available
Title
Marked effect of In, Pb and Ce addition upon the reduction of NO by CO over SiO2 supported Pd catalysts
Abstract

Addition effect of In, Pb and Ce on the NO–CO reaction over SiO2 supported Pd catalysts was studied, using a closed gas circulation system as well as an in situ infrared spectroscopy. Formation of intermetallic compounds was observed in the cases of Pd–In/SiO2 and Pd–Pb/SiO2 catalysts, which caused the drastic enhancement of the reaction rate of N2O formation. The infrared analyses revealed the weakening of adsorption strength of CO on Pd metal by the formation of intermetallic compounds, which is the main reason for the enhancement of the reaction rate. In the case of Pd–Ce/SiO2 catalysts, SMSI-like interaction between Pd and CeO2 would be important for the enhancement effect.

Keywords
NO–CO reaction; Pd/SiO2 catalyst; Addition effect; Pd–In; Pd–Pb; Pd–Ce
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Marked effect of In, Pb and Ce addition upon the reduction of NO by CO over SiO2 supported Pd catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 8, August 2007, Pages 1249–1254
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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