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US 5,413,976 AGranted
Exhaust gas purification catalyst
AssigneeMazda Motor Corporation
InventorsAkihide Takami, Yasuto Watanabe, Hideharu Iwakini, Takashi Takemoto
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Abstract
An exhaust gas purifying catalyst includes an active compound, including platinum (Pt) and iridium (Ir), as an essential active compound base and any combination of two or more metals of terbium (Tb), nickel (Ni), indium (In), tin (Sn), cobalt (Co) and cerium (Ce), excepting a combination of indium (In) and tin (Sn), as an additive active material. The base and additive active material are deposited on and carried by a silicate carrier.
Claims20
An exhaust gas purifying catalyst comprising:
- a silicate carrier;
- and
- an active material carried by said silicate carrier, said active material comprising platinum (Pt) and iridium (Ir) as an essential active material base, and any combination of at least two metals including terbium (Tb), nickel (Ni), indium (In), tin (Sn), cobalt (Co) and cerium (Ce), excepting a combination of indium (In) and tin (Sn), as an additive active material.
Dependencies are inferred from the claim text.