Studebaker & Brackett PC
Exhaust gas purifying catalyst, method for producing same, and exhaust gas purification method using same
An exhaust gas purify catalyst includes a substrate (1), an oxidation catalyst layer (2) formed on the substrate (1) and containing zeolite and at least one catalytic metal, an LNT layer (3) formed on the oxidation catalyst layer (2) and containing an NOx storage material and at least one catalytic metal, and an NOx reduction layer (4) formed on the LNT layer (3) and containing Rh acting as a catalytic metal and at least one of alumina or zirconia, wherein the NOx reduction layer (4) has a larger content of Rh than that in each of the oxidation catalyst layer (2) and the LNT layer (3).
MAZDA MOTOR CORPORATION
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Masahiko Takashi Yoshiyuki Koichiro Akihide Hiroshi
Shigetsu Baba Sato Harada Takami Yamada