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Selective CO oxidation over carbon-coated Pt/SiO2-TiO2 particles

Paper ID Volume ID Publish Year Pages File Format Full-Text
44317 46014 2006 6 PDF Available
Title
Selective CO oxidation over carbon-coated Pt/SiO2-TiO2 particles
Abstract

Carbon-coated Pt/SiO2-TiO2 catalyst was synthesized by vapor infiltration of furfuryl alcohol into porous SiO2-TiO2 particles, followed by carbonization at 1000 °C under N2 atmosphere. At the elevated temperature of 1000 °C, the Pt particles on the uncoated SiO2-TiO2 particles aggregated and the micropores and macropores of the uncoated SiO2-TiO2 particles disappeared. Further, a phase transformation of TiO2 from anatase to rutile was complete at 1000 °C. On the other hand, the aggregation of Pt and SiO2-TiO2 particles and the phase transformation of TiO2 were partly suppressed for the carbon-coated Pt/SiO2-TiO2 particles. The carbon-coated catalyst showed a high activity and high selectivity for CO oxidation in excess H2, due to selective adsorption and diffusion of CO through the carbon layer. This work demonstrates that reactant selectivities (CO/H2) in oxidation can be enhanced by a combination of catalyst particles with an adsorption-selective layer.

Keywords
Pt/SiO2-TiO2; Carbon coating; CO oxidation; Vapor infiltration; Thermal stability
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 308, 10 July 2006, Pages 210–215
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us