Exhaust gas purification catalyst
AssigneeMazda Motor Corporation
InventorsHisaya Kawabata, Masahiko Shigetsu
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Abstract
Catalytic converter for exhaust gas purification comprises a carrier, an oxide layer positioned above the carrier and comprising a compound oxide of cerium (Ce) and magnesium (Mg) with its molar ratio of Mg/(Ce+Mg), and a catalytic metal loaded on the oxide layer. By comprising the compound oxide of cerium and magnesium in the oxide layer, higher purification performance or lower light-off temperature can be obtained under the lean exhaust gas condition during the engine startup.
Claims20
A catalytic converter for exhaust gas purification comprising:
- a carrier;
- an oxide layer positioned above said carrier, said oxide layer comprising a compound oxide of cerium (Ce) and magnesium (Mg);
- and
- a catalytic metal loaded on said oxide layer.
Catalytic matter for exhaust gas purification comprising:
- compound oxide prepared from cerium (Ce) and magnesium (Mg);
- and
- catalytic metal loaded on said compound oxide.
A method of manufacturing catalytic matter for exhaust gas purification, the method comprising:
- preparing compound oxide at least from cerium (Ce) and magnesium (Mg);
- and
- loading catalytic metal on said compound oxide to form catalytic matter.
Dependencies are inferred from the claim text.