Morrison & Foerster
Catalyst for purifying exhaust gas
 An exhaust gas purifying catalyst (3) has an inner catalytic layer (5) fixed on a carrier (4). In the inner catalytic layer (5), there are held a palladium component, platinum component and a rhodium component by a base material containing an alumina component composed of alumina impregnated with lanthanum. Further, the exhaust gas purifying catalyst (3) has an outer catalytic layer (6) formed on the inner catalytic layer (5). In the outer catalytic layer (6), a palladium component is held by a base material which contains an alumina component, an oxide complex of ceria and zirconia and a magnesium component. 
Mazda Motor Corporation
B B B Y Y F
B01D B01J B01J Y02T Y02A F01N
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Shinichi Osamu Yuki Kaori Hiroshi Hiroshi Kenji
Tanioka Takayama Koda Imada Yamada Murakami Okamoto