Mazda Motor Corporation

Yasuhiro Matsumura

Masahiko Shigetsu

Hisaya Kawabata

Akihide Takami

Masaaki Akamine

Hiroshi Yamada

Takeo Yamauchi

Kazuya Yokota

Yusuke Koike

Yuki Murakami

Toshihiko Ohsumi

A device includes a first catalystincluding a Pd-containing catalyst layer and a Rh-containing catalyst layer and a second catalystcontaining 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 catalystor the second catalystis located upstream of the other in a flow direction of an exhaust gas from an engine

Exhaust gas purification catalyst device and exhaust gas purification method

An exhaust gas purification catalytic devicecontains Pt, Pd, and Rh as catalytic metals. The catalytic metal Pt is loaded on silica-alumina which serves as a support, and Pt-loaded silica-alumina obtained by loading the Pt on the silica-alumina is contained in a catalytic layer with which an exhaust gas contacts first.

Catalyst device for exhaust gas purification and method for exhaust gas purification

An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes Rh-supporting Zr-based composite oxide in which Rh6 is supported on Zr-based composite oxide containing Zr and a rare earth metal except Ce. The Rh-supporting Zr-based composite oxide has been previously subjected to a reduction treatment.

Exhaust gas purification catalyst and method for producing the same

An exhaust gas purification catalytic material for purifying exhaust gas from an engine includes ZrLaY composite oxide containing ZrOas a main component, 2% by mass or more and 10% by mass or less of LaO, and 2% by mass or more and 20% by mass or less of YO, and Rh is loaded on the composite oxide.

Exhaust gas purification catalyst

An exhaust gas purification catalyst includes a Rh-containing catalyst layer provided on a base material. The Rh-containing catalyst layer includes a binder material of Rh-doped CeZr-based composite oxide containing Ce and Zr and doped with Rh. The binder material has been previously subjected to a reduction treatment.

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Hiroshima, Japan

Yasuhiro Matsumura