| abstract |
An oxidation catalyst for treating exhaust gas produced by a diesel engine including a catalyst region and a substrate, wherein the catalyst region is bismuth (Bi), antimony (Sb) or an oxide thereof; (i) platinum (Pt), (ii) palladium (Pd) and (iii) a platinum group metal (PGM) selected from the group consisting of platinum (Pt) and palladium (Pd); and a support material that is a refractory oxide; A platinum group metal (PGM) is supported on the support material; bismuth (Bi), antimony (Sb) or an oxide thereof is supported on the support material, and / or a refractory oxide is bismuth, An oxidation catalyst is described that includes antimony or oxides thereof. [Selection] Figure 1 |