EXHAUST GAS PURIFICATION CATALYTIC DEVICE
Provided is an exhaust gas purification catalytic device having a first catalyst coating layer 200 and a second catalyst coating layer 300 on a substrate 100, wherein the first catalyst coating layer 200 includes first inorganic oxide particles 10 and first catalytic noble metal particles 40, the se...
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Sprache: | eng ; fre ; ger |
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Zusammenfassung: | Provided is an exhaust gas purification catalytic device having a first catalyst coating layer 200 and a second catalyst coating layer 300 on a substrate 100, wherein the first catalyst coating layer 200 includes first inorganic oxide particles 10 and first catalytic noble metal particles 40, the second catalyst coating layer 300 includes second inorganic oxide particles 60 and second catalytic noble metal particles 70, the first inorganic oxide particles 10 include a composite oxide support 30 containing an OSC material 11 and an alkaline earth metal oxide 20, the first catalytic noble metal particles 40 include one or two selected from Pt and Pd, the second inorganic oxide particles 60 include the OSC material 11, the second catalytic noble metal particles 70 include Rh, the first catalyst coating layer 200 is substantially free of Rh, and the second catalyst coating layer 300 is substantially free of Pt, Pd, and alkaline earth metal oxides. |
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