A catalyst composition is provided for use on a
diesel particulate filter which facilitates the oxidation of
soot from
diesel engine exhaust and which generates low NO2 emissions during regeneration of the filter. The catalyst composition includes a
catalytic metal comprising a
platinum group
metal selected from Pt, Pd, Pt—Pd, or combinations thereof, an active
metal oxide component containing Cu and La; and an
oxide component selected from oxides of Co, Fe, or combinations thereof. The catalyst composition includes a support selected from
alumina, silica, zirconia, or combinations thereof. The catalyst composition may be provided on a
diesel particulate filter by impregnating the filter with an
alumina, silica or zirconia
sol solution modified with
glycerol and / or saccharose, impregnating the filter with a stabilizing solution, and impregnating the filter with a solution containing the catalyst
metal precursor(s), the active metal
oxide precursor(s) and the Co or Fe oxide(s). The resulting catalyst coated
diesel particulate filter provides effective
soot oxidation, exhibits good
thermal stability, has a high BET surface area, exhibits minimal backpressure, and produces low NO2 emissions during filter regeneration.