Investigation of palladium interaction with cerium oxide and its state in catalysts for low-temperature CO oxidation

Palladium catalysts supported on nanosized CeO 2 supports were synthesized by different methods. The catalysts showed high low-temperature activity (LTA) in CO oxidation. The synthesized palladium–ceria catalysts for low-temperature CO oxidation were investigated by a complex of physicochemical meth...

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Bibliographic Details
Published in:Catalysis today 2009-06, Vol.144 (3), p.201-211
Main Authors: Boronin, A.I., Slavinskaya, E.M., Danilova, I.G., Gulyaev, R.V., Amosov, Yu.I., Kuznetsov, P.A., Polukhina, I.A., Koscheev, S.V., Zaikovskii, V.I., Noskov, A.S.
Format: Article
Language:English
Subjects:
Catalysis
Ceria
CO oxidation
HRTEM
IRS
Palladium
XPS
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Summary:Palladium catalysts supported on nanosized CeO 2 supports were synthesized by different methods. The catalysts showed high low-temperature activity (LTA) in CO oxidation. The synthesized palladium–ceria catalysts for low-temperature CO oxidation were investigated by a complex of physicochemical methods, and their catalytic performance was determined in the light-off regime. It was shown using high-resolution transmission electron microscopy (HRTEM) and EDX microanalysis that the catalysts with high LTA are characterized by exceptionally high dispersity of palladium on the surface of the supports. Two different states of palladium were observed by XPS. They correspond to the surface interaction phases (SIPs) as Pd x CeO 2−δ and small metal clusters (
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2009.01.035