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Superior performance of gold supported on doped CeO2 catalysts for the preferential CO oxidation (PROX)

Paper ID Volume ID Publish Year Pages File Format Full-Text
39469 45824 2014 11 PDF Available
Title
Superior performance of gold supported on doped CeO2 catalysts for the preferential CO oxidation (PROX)
Abstract

•Au catalysts supported on ceria and Y or Nb doped ceria were studied.•The three catalysts perform well in ideal mixtures.•The Nb doped catalysts perform better in simulate reformate gas.

Herein, the preferential oxidation of CO in excess hydrogen (PROX reaction) was studied over Au catalysts supported on ceria and Y or Nb doped ceria. Both supports and catalysts have been extensively characterized by a number of advanced techniques; XRD, N2-adsortion, Raman spectroscopy, XPS, and H2-TPR. The catalytic results showed that when an ideal mixture of H2 and CO is used for the PROX reaction the gold supported on pure ceria behaves better than the others samples. However, when a typical reformate gas composition containing CO2 and H2O is used, the gold supported on Nb doped sample behaves better than gold supported in pure ceria. It is suggested that niobium hampers the strong adsorption of CO2 and H2O in the active sites, thus improving the catalytic performance in real reformate gas.

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Keywords
PROX; CO oxidation; Gold nanoparticles; Ceria; Doped ceria
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Superior performance of gold supported on doped CeO2 catalysts for the preferential CO oxidation (PROX)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 487, October 2014, Pages 119–129
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