Patent ID: 8309488

Claim:
An exhaust gas purifying catalyst comprising: a catalyst substrate; and a catalyst coating layer containing a noble metal and a refractory inorganic oxide, and formed on the catalyst substrate, wherein the catalyst coating layer includes an upstream portion located upstream in a flow direction of an exhaust gas and a downstream portion located downstream in the flow direction of the exhaust gas, the upstream portion is separate from and abuts the downstream portion and at least the upstream portion has a layered structure including an upstream portion inside layer and an upstream portion outside layer, the upstream portion inside layer contains a cerium-zirconium composite oxide in which a relative proportion of CeO 2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer contains a cerium-zirconium composite oxide in which a relative proportion of ZrO 2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion and the amount of Rh contained in the downstream portion is greater than zero (0).