SINGLE-LAYERED HIGH-EFFICIENCY CATALYST FOR TREATING EXHAUST GASES OF INTERNAL COMBUSTION ENGINE AND A METHOD FOR PREPARING THE SAME Russian patent published in 2006 - IPC B01J23/63 B01J23/42 B01J21/04 B01J21/06 B01J23/89 B01J37/02 B01D53/94 

FIELD: gas treatment catalysts.

SUBSTANCE: invention provides catalyst consisted of inert carrier and catalytic coating containing platinum, rhodium, and oxide substrate, wherein catalytic coating includes: (i) at least one first substrate material selected from group consisted of first active aluminum oxide enriched with cerium oxide; mixed oxide, which is cerium oxide/zirconium dioxide; and zirconium dioxide component; provided that catalytic component in at least one first substrate material is first portion of the total quantity of catalyst platinum, wherein concentration of the first portion of the total quantity of catalyst platinum lies within a range of 0.01 to 5.0% of the total mass of catalyst-containing materials; and (ii) a second substrate material containing second portion of total quantity of platinum and rhodium as catalytic component, said second substrate material being second active aluminum oxide, wherein concentration of platinum plus rhodium on the second substrate material lies within a range of 0.5 to 20% of the total mass of the second substrate material. Method for preparing above catalyst is also provided.

EFFECT: increased catalytic activity and reduced catalyst preparation expenses.

17 cl, 3 dwg, 5 tbl, 3 ex