Loading patent…
AssigneesCataler Corporation, Toyota Jidosha Kabushiki Kaisha
InventorsMichihiko Takeuchi, Hirotaka Ori, Takeru Yoshida, Kazunobu Ishibashi, Ichiro Hachisuka
Estimating the term…
The present invention provides an exhaust gas purification catalyst comprising a base material, and a two or more layered catalyst coating layer, formed on the base material, wherein the two or more layers have upper and lower layers, and wherein the upper layer contains a large amount of noble metal per liter of the base material more than that of the lower layer, and the lower layer contains a large amount of an oxygen storage/release material per liter of the base material more than that of the upper layer. This exhaust gas purification catalyst has more excellent H2S purifying performance than conventional catalysts while maintaining purifying performance against NOx and the other exhaust gas components.
An exhaust gas purification catalyst comprising a base material, and a multi-layered catalyst coating layer formed on the base material, wherein the catalyst coating layer consists of an upper layer formed over a surface of a lower layer and the lower layer formed over a surface of the base material, and optionally, a plurality of additional layers in between the upper layer and the lower layer, and
An exhaust gas purification catalyst comprising a base material, and a multi-layered catalyst coating layer formed on the base material, wherein the catalyst coating layer consists of an upper layer formed over a surface of a lower layer and the lower layer formed over a surface of the base material, and optionally, a plurality of additional layers in between the upper layer and the lower layer, and
Dependencies are inferred from the claim text.