New Pd/CexZr1-xO2/Al2O3 three-way catalysts prepared by microemulsion Part 1. Characterization and catalytic behavior for CO oxidation. Fernandez-Garcia, M, Martinez-Arias, A, Iglesias-Juez, A, Hungria, A B, Anderson, J A, Conesa, J C, & Soria, J Applied Catalysis B: Environmental, 31(1):39–50, Instituto de Catálisis y Petroleoquímica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain, 2001.
abstract   bibtex   
The state of a series of palladium catalysts supported on ceria-zirconia and ceria-zirconia/alumina in the calcined state and under a reactive CO + O2 atmosphere has been characterized by a combination of electron transmission microscopy, infrared and electron paramagnetic resonance spectroscopies, and the results obtained used to interpret the catalytic behavior displayed by the samples in the CO oxidation reaction. The Ce/Zr promoter enhances the catalytic properties of the noble metal by favoring the formation of the metallic state and through creation of anionic vacancies in the Ce-Zr component even from room temperature. The optimum promoting effect in the CO oxidation is observed for palladium particles in contact with three-dimensional-like Ce-Zr particles due to the appropriate nature and high number of the anion vacancies present at their surface. Compared with classical ceria-based systems, CO oxidation is here maximized for Pd-supported on the bulk material and not on mixed ceria-containing/alumina catalysts. These differences are discussed on the basis of the effect of the ceria and ceria-zirconia promoter particle size on the nature and number of active sites. © 2001 Elsevier Science B.V.
@article{Fernandez-Garcia2001a,
abstract = {The state of a series of palladium catalysts supported on ceria-zirconia and ceria-zirconia/alumina in the calcined state and under a reactive CO + O2 atmosphere has been characterized by a combination of electron transmission microscopy, infrared and electron paramagnetic resonance spectroscopies, and the results obtained used to interpret the catalytic behavior displayed by the samples in the CO oxidation reaction. The Ce/Zr promoter enhances the catalytic properties of the noble metal by favoring the formation of the metallic state and through creation of anionic vacancies in the Ce-Zr component even from room temperature. The optimum promoting effect in the CO oxidation is observed for palladium particles in contact with three-dimensional-like Ce-Zr particles due to the appropriate nature and high number of the anion vacancies present at their surface. Compared with classical ceria-based systems, CO oxidation is here maximized for Pd-supported on the bulk material and not on mixed ceria-containing/alumina catalysts. These differences are discussed on the basis of the effect of the ceria and ceria-zirconia promoter particle size on the nature and number of active sites. © 2001 Elsevier Science B.V.},
address = {Instituto de Cat\'{a}lisis y Petroleoqu\'{\i}mica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain},
annote = {Cited By (since 1996): 70

        
Export Date: 15 January 2013

        
Source: Scopus

        
CODEN: ACBEE

        
doi: 10.1016/S0926-3373(00)00265-4

        
Language of Original Document: English

        
Correspondence Address: Fern\'{a}ndez-Garc\'{\i}a, M.; Inst. de Catalisis y Petroleoquimica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain; email: m.fernandez@icp.csic.es

        
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author = {Fernandez-Garcia, M and Martinez-Arias, A and Iglesias-Juez, A and Hungria, A B and Anderson, J A and Conesa, J C and Soria, J},
issn = {09263373 (ISSN)},
journal = {Applied Catalysis B: Environmental},
keywords = {Alumina-supported ceria-zirconia,CO oxidation,Catalysts,DRIFTS,EPR,Electron paramagnetic resonance spectrometry,Microemulsions,Oxidation,Palladium,Paramagnetic resonance,Particle size analysis,Precious metals,TEM-EDS,TWC catalysts,Thermal effects,Transmission electron microscopy,Zirconium compounds},
number = {1},
pages = {39--50},
title = {{New Pd/CexZr1-xO2/Al2O3 three-way catalysts prepared by microemulsion Part 1. Characterization and catalytic behavior for CO oxidation}},
volume = {31},
year = {2001}
}

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