Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Masaya Kamada

Naoki Takahashi

Hirohito Hirata

Satoru Katoh

Tadashi Suzuki

Masaya Ibe

Takaaki Kanazawa

Nobuyuki Takagi

Yuichi Sobue

Michihiko Takeuchi

Mayuko Osaki

Minoru Itou

Tetsuya Shinozaki

Hanae Ikeda

Ryoichi Inde

Itou Minoru

An exhaust gas-purifying catalyst includes a support provided with one or more through-holes through which exhaust gas flows, and a catalytic layer supported by the support and containing an oxygen storage material. The exhaust gas-purifying catalyst includes a first section to which the exhaust gas is supplied, and a second section to which the exhaust gas having passed through the first section is supplied. The catalytic layer includes a layered structure of a first catalytic layer containing platinum and/or palladium and a second catalytic layer containing rhodium in the first catalytic section and further includes a third layer containing rhodium in the second section. The second section is smaller in oxygen storage material content per unit volumetric capacity than the first section.

Exhaust gas-purifying catalyst

The exhaust gas purification catalyst according to the present invention has a substrate, a lower layerdisposed on this substrate, and an upper layerdisposed on this lower layer. The upper layeris provided with a first catalyst and a second catalyst, and the lower layeris provided with a first catalyst. This first catalyst has AlOas a carrier and Pt and Pd as noble metals supported on the AlO, while the second catalyst typically has an AlO&#x2014;ZrO&#x2014;TiOcomplex oxide as a carrier and has Pd as a noble metal supported on the AlO&#x2014;ZrO&#x2014;TiOcomplex oxide. Moreover, the upper layerhas a hydrocarbon adsorbent

Exhaust gas purification catalyst

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Toyota, Japan

Masaya Kamada