On the mechanism of hydrogen-promoted gold-catalyzed CO oxidation

Handle URI:
http://hdl.handle.net/10754/566008
Title:
On the mechanism of hydrogen-promoted gold-catalyzed CO oxidation
Authors:
Quinet, Elodie; Piccolo, Laurent; Morfin, Franck; Avenier, Priscilla; Diehl, Fabrice; Caps, Valerie; Rousset, Jean Luc
Abstract:
The kinetics of CO oxidation, H2 oxidation and preferential CO oxidation (PrOx) over Au/Al2O3 catalysts have been investigated. The catalysts with the smallest particles (∼2 nm) are the most active for all three reactions. As previously observed, the presence of H2 greatly promotes CO oxidation, which becomes faster than CO-free H2 oxidation at low temperature. From these results and on the basis of previous works, we propose a complete PrOx mechanism. The reaction involves Au-OOH, Au-OH and Au-H intermediates, also involved in H2 oxidation, and benefits from the presence of low-coordination sites. © 2009 Elsevier Inc. All rights reserved.
KAUST Department:
KAUST Catalysis Center (KCC)
Publisher:
Elsevier BV
Journal:
Journal of Catalysis
Issue Date:
10-Dec-2009
DOI:
10.1016/j.jcat.2009.09.019
Type:
Article
ISSN:
00219517
Appears in Collections:
Articles; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorQuinet, Elodieen
dc.contributor.authorPiccolo, Laurenten
dc.contributor.authorMorfin, Francken
dc.contributor.authorAvenier, Priscillaen
dc.contributor.authorDiehl, Fabriceen
dc.contributor.authorCaps, Valerieen
dc.contributor.authorRousset, Jean Lucen
dc.date.accessioned2015-08-12T08:59:10Zen
dc.date.available2015-08-12T08:59:10Zen
dc.date.issued2009-12-10en
dc.identifier.issn00219517en
dc.identifier.doi10.1016/j.jcat.2009.09.019en
dc.identifier.urihttp://hdl.handle.net/10754/566008en
dc.description.abstractThe kinetics of CO oxidation, H2 oxidation and preferential CO oxidation (PrOx) over Au/Al2O3 catalysts have been investigated. The catalysts with the smallest particles (∼2 nm) are the most active for all three reactions. As previously observed, the presence of H2 greatly promotes CO oxidation, which becomes faster than CO-free H2 oxidation at low temperature. From these results and on the basis of previous works, we propose a complete PrOx mechanism. The reaction involves Au-OOH, Au-OH and Au-H intermediates, also involved in H2 oxidation, and benefits from the presence of low-coordination sites. © 2009 Elsevier Inc. All rights reserved.en
dc.publisherElsevier BVen
dc.subjectCO oxidationen
dc.subjectGolden
dc.subjectHydrogenen
dc.subjectHydroperoxy intermediatesen
dc.subjectPrOx or SelOxen
dc.titleOn the mechanism of hydrogen-promoted gold-catalyzed CO oxidationen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalJournal of Catalysisen
kaust.authorCaps, Valerieen
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