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Aging-Induced Metal Redistribution in Bimetallic Catalysts (2002)

Abstract

Alloy particles were detected by XRD in bimetallic catalysts, made from physical mixtures of powders comprising distinct metal-support combinations (e.g., Pd on alumina and Rh on ceria-zirconia), following high-temperature redox aging. The morphology of the catalysts was examined by TEM, and the compositional structure of some of the alloy particles was determined. Two different effects of the redistribution of metals on oxygen-storage capacity were identified, one due to Pd enrichment of the surface of Pd-Rh alloy particles and the other due to loss of contact between metal and ceria-zirconia.. Peer Reviewed. http://deepblue.lib.umich.edu/bitstream/2027.42/44261/1/10562_2004_Article_370782.pdf

Publication details

Download	, http://hdl.handle.net/2027.42/44261
Publisher	Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media
Contributors	Department of Materials Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI, 48109-2136, USA, Department of Materials Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI, 48109-2136, USA, Chemical Engineering Department, Ford Research Laboratory, MD3179/SRL, PO Box 2053, Dearborn, MI, 48121, USA, Chemical Engineering Department, Ford Research Laboratory, MD3179/SRL, PO Box 2053, Dearborn, MI, 48121, USA, Chemical Engineering Department, Ford Research Laboratory, MD3179/SRL, PO Box 2053, Dearborn, MI, 48121, USA, Ann Arbor
Repository	University of Michigan (United States)
Keywords	TEM, aging, Physical Chemistry, Industrial Chemistry/Chemical Engineering, Pharmacy, alloying, automotive exhaust catalysts, bimetallic catalysts, oxygen storage, Pd-Rh, Pt-Rh, Chemistry, ceria-zirconia, Chemical Engineering, Materials Science and Engineering, Chemistry, Biological Chemistry, Engineering, Health Sciences, Science
Language	English