Emmission control catalyst article with enriched PGM zone

An emission control catalyst article comprising:

• a substrate having an inlet axial end and an outlet axial end,
• a bottom washcoat layer coated on about 60% to about 100% of the axial length of the substrate from the inlet axial end to the outlet axial end, and
• a top washcoat layer coated on about 60% to about 100% of the axial length of the substrate from either the inlet or the outlet end of the substrate such that the top washcoat layer covers at least about 60% of the length of the bottom washcoat layer,
• wherein the top washcoat layer and/or the bottom washcoat layer comprises a first portion comprising one or more platinum group metals and a second portion comprising one or more platinum group metals,
• wherein the first portion begins at the inlet axial end of the substrate,
• wherein the platinum group metal concentration in the first portion is about 2 to about 100 times higher than the platinum group metal concentration in the second portion,
• wherein the first portion has a length of about 0.25 inches to about 2 inches, and
• wherein the platinum group metal loading in the first portion is about 10 g/ft3 to about 1000 g/ft3, as determined axially from a first end of the first portion to a second end of the first portion.