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AssigneeMazda Motor Corporation
InventorsTakashi Takemoto, Kazunari Komatsu, Taeko Shimizu, Hiroshi Yamada, Hiroshi Murakami, Masayuki Koishi, Yuki Koda, Keiko Matsui
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A catalyst (3) for purifying an automotive exhaust gas, in which inner and outer catalytic layers (5,6), each of which has a base material and a catalytic material held by the base material, are stratified on a honeycomb-type carrier (4). In the catalyst (3), the inner catalytic layer (5) contains a palladium component as the catalytic component. Further the inner catalytic layer (5) contains a nickel oxide component for preventing poisoning of the palladium component. On the other hand, though the outer catalytic layer (6) contains a rhodium component as the catalytic component, it does not contain a palladium component nor a nickel oxide component.
A catalyst for purifying an exhaust gas, comprising:
The catalyst recited in claim wherein said first catalytic layer contains a ceria component and a zirconia component.
A catalyst for purifying an exhaust gas, comprising a carrier and a plurality of catalytic layers coating said carrier,
A catalyst for purifying an exhaust gas, comprising:
A catalyst for purifying an exhaust gas, comprising:
Dependencies are inferred from the claim text.