CATALYST AND METHOD FOR THE REDUCTION OF NITROGEN OXIDES
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Dec 10, 2015
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Feb 21, 2014
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Feb 21, 2013
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The present invention relates to a nitrogen oxide storage catalyst composed of at least two catalytically active washcoat layers on a support body, wherein a lower washcoat layer A contains cerium oxide, an alkaline earth metal compound and/or an alkali metal compound, and also platinum, and an upper washcoat layer B disposed atop the washcoat layer A, containing cerium oxide, and also platinum and palladium, and no alkaline earth metal compound, and a method for converting NOx in the exhaust gases of motor vehicles which are operated with lean-burn engines.
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