Patent ID: 8207078

Claim:
A close coupled catalyst for purification of exhaust gas of motor vehicle, comprising: a carrier, a washcoating applied on the carrier, and catalyst active components applied on the washcoating, characterized in that: the carrier is selected from cordierite honeycomb ceramic material; the washcoating is a mixture of hexaaluminate and perovskite-type composite oxide, cerium-zirconium solid solution, rare-earth oxide and alumina, alkali-earth oxide and molecular sieve having a Si/Al ratio greater than 80, wherein the molecular sieve is selected from the group consisting of MCM-22 and beta zeolite; the rare-earth element is selected from lanthanum, cerium or praseodymium; the alkali-earth oxide is one and/or more than one of calcium oxide, strontium oxide, and barium oxide; the catalyst active components are a mixture of noble metal, non-noble metal oxide and rare-earth oxide, wherein the noble metal is palladium and rhodium, the non-noble metal is manganese, cobalt and iron, and the rare-earth oxide is cerium oxide.