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One embodiment of the invention may include a method comprising providing a product comprising a substrate comprising a perovskite catalyst, NOx stored in or on the substrate and particulate matter in or on the substrate; releasing at least some of the stored NOx and oxidizing the released NOx to fo

One embodiment of the invention may include a method comprising providing a product comprising a substrate comprising a perovskite catalyst, NOx stored in or on the substrate and particulate matter in or on the substrate; releasing at least some of the stored NOx and oxidizing the released NOx to form NO2, and reacting the NO2 with carbon in the particulate matter to form at least one of CO or CO2.

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1. A product comprising: a combustion engine and exhaust treatment system wherein the combustion engine produces exhaust comprising particulate matter and NOx, the system comprising an engine and a catalytic converter downstream of the engine; a combination particulate filter and NOx storage compone

1. A product comprising: a combustion engine and exhaust treatment system wherein the combustion engine produces exhaust comprising particulate matter and NOx, the system comprising an engine and a catalytic converter downstream of the engine; a combination particulate filter and NOx storage component; the particulate filter comprising a perovskite catalyst and a NOx storage material, and constructed and arranged so that particulate matter from the combustion engine exhaust is trapped in the particulate filter and NOx is stored in the NOx storage material wherein the particulate filter comprises a second non-perovskite catalyst comprising platinum and the perovskite catalyst comprises an alkaline earth metal. 2. A product as set forth in claim 1 wherein the perovskite catalyst and NOx storage material are in the same layer. 3. A product as set forth in claim 1 wherein the perovskite catalyst and NOx storage material are in different layers or sections of the substrate or product. 4. A product as set forth in claim 1 wherein the NOx storage material comprises an alkaline earth metal rare earth based oxide comprising CeO2—ZrO2, CeO2—ZrO2—Pr6OII, CeO2—ZrO2—Pd2O3 or CeO2—ZrO2—La2O3. 5. A product comprising a combination of particulate filter and NOx storage component; the particulate filter comprising a perovskite catalyst and a NOx storage material, and constructed and arranged so that particulate matter from combustion engine exhaust is trapped particulate filter and NOx is stored in the NOx storage material wherein the particulate filter comprises a second non-perovskite catalyst comprising platinum and the perovskite catalyst comprises an alkaline earth metal. 6. A product as set forth in claim 5 wherein the perovskite catalyst and NOx storage material are in the same layer. 7. A product as set forth in claim 5 wherein the perovskite catalyst and NOx storage material are in different layers or sections of the substrate or product. 8. A method as set forth in claim 5 wherein the perovskite catalyst has the general formula ABO3, AA′BO3, ABB′O3, or AA′BB′O3, wherein A comprises an alkaline-earth metal and wherein B comprises a transition metal. 9. A method as set forth in claim 8, wherein said perovskite catalyst has the general formula AA′BO3; wherein A comprises an alkaline-earth metal;wherein B comprises a transition metal; andwherein A′ comprises a substitution of a promoter material for a portion of A. 10. A method as set forth in claim 8, wherein said perovskite catalyst has the general formula ABB′O3, wherein A comprises an alkaline-earth metal;wherein B comprises a transition metal; andwherein B′ comprises a substitution of a promoter material for a portion of B. 11. A method as set forth in claim 8, wherein said perovskite catalyst has the general formula AA′BB′O3, wherein A comprises an alkaline-earth metal;wherein B comprises a transition metal;wherein A′ comprises a substitution of a promoter material for a portion of A; andwherein B′ comprises a substitution of a promoter material for a portion of B. 12. A method as set forth in of claim 11, wherein A′ comprises Strontium. 13. A product as set forth in claim 8, wherein B is Cobalt or Manganese or Iron. 14. A product as set forth in claim 5 wherein the NOx storage material comprises a rare earth based oxide comprising CeO2—ZrO2,CeO2—ZrO2—Pr6OII, CeO2—ZrO2—Pd2O3 or CeO2—ZrO2—La2O3. 15. A method comprising providing a product comprising a particulate filter comprising a substrate comprising perovskite catalyst, NOx stored in or on the substrate and particulate matter in or on the substrate; releasing at least some of the stored NOx and oxidizing the released NOx to form NO2, and reacting the NO2 with carbon in the particulate matter to form at least one of CO or CO2 wherein the product comprises a second non-perovskite catalyst comprising platinum and the perovskite catalyst comprises an alkaline earth metal. 16. A method as set forth in claim 15, wherein the substrate further comprises a noble metal catalyst. 17. A method as set forth in claim 15, wherein the product may further comprise a NOx storage material. 18. A product as set forth in claim 15 wherein the substrate further comprises a nitrogen trap material comprises a rare earth based oxide comprising CeO2—ZrO2, CeO2—ZrO2—Pr6OII, CeO2—ZrO2—Pd2O3 or CeO2—ZrO2—La2O3. 19. A method comprising providing a particulate filter comprising a substrate comprising a perovskite catalyst, NOx stored in or on the substrate and particulate matter in or on the substrate; releasing at least some of the stored NOx and oxidizing the released NOx to form NO2, and reacting the NO2 with carbon in the particulate matter to form at least one of CO or CO2 wherein the particulate filter comprises a second non-perovskite catalyst comprising platinum and the perovskite catalyst comprises an alkaline earth metal. 20. A product as set forth in claim 19 wherein the substrate further comprises a nitrogen trap material comprises a rare earth based oxide comprising CeO2—ZrO2, CeO2—ZrO2—Pr6OII, CeO2—ZrO2—Pd2O3 or CeO2—ZrO2—La2O3. 21. A product comprising a particulate filter and NOx trap combination, wherein the particulate filter comprises a substrate constructed and arranged to trap particulate matter in a gas stream flowing in, through or over the substrate, and further comprising a trap material in, on or over the substrate and a perovskite catalyst in, on or over the substrate wherein the particulate filter and NOx trap combination comprises a second non-perovskite catalyst comprising platinum and the perovskite catalyst comprises an alkaline earth metal. 22. A product as set forth in claim 21 wherein the nitrogen trap material comprises a rare earth based oxide comprising CeO2—ZrO2, CeO2—ZrO2—Pr6OII, CeO2—ZrO2—Pd2O3 or CeO2—ZrO2—La2O3.