Studebaker & Brackett PC
Exhaust gas purification catalyst device and exhaust gas purification method
A device includes a first catalyst 41 including a Pd-containing catalyst layer and a Rh-containing catalyst layer and a second catalyst 42 containing Pt-loaded alumina and containing neither Rh nor Pd. The first catalyst or the second catalyst are disposed in one place in such a manner that one of the first catalyst 41 or the second catalyst 42 is located upstream of the other in a flow direction of an exhaust gas from an engine 1. 
MAZDA MOTOR CORPORATION
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Masahiko Yasuhiro Hisaya Hiroshi
Shigetsu Matsumura Kawabata Yamada