abstract |
Described is a substrate monolith 6 having a length L that has a first zone 11 of substantially uniform length defined at one end by a first end of the substrate monolith, the first zone having a selective catalytic reduction (SCR) catalyst for reducing Nitrogen oxides comprising a nitrogen-containing reducing agent in exhaust gas emitted from an internal combustion engine, and a second zone 8 of substantially uniform length smaller than L defined at one end by a second end of the substrate monolith, the second zone (Fig. a) at least one particulate metal oxide or a mixture of any two or more thereof for trapping a platinum group metal (PGM) in the gas phase, wherein the at least one particulate metal oxide does not serve as a support for any further catalytic component, or (b) a Component with the ability to trap and / or alloy Forming with a PGM in the gas phase includes. |