Honda Giken Kogyo Kabushiki Kaisha

Toshiya Kunisaki

Hiroshi Kato

Masaharu Nakamori

Jun Fujii

In a catalyst element for purifying exhaust gases having a metallic carrier and a catalyst carrying layer, an undercoat layer is formed by coating the surface of the carrier with a heat resistant inorganic oxide which is superior in adhesion to a metal. The catalyst carrying layer is then formed by carrying platinum (Pt) and rhodium (Rh) on an alumina layer. The catalyst carrier layer can thus be adhered in a close and better contact with the carrier via the undercoat layer. Even when the carrier is subjected to thermal expansion and vibrations, the amount of peeling of the platinum and rhodium off (or away from) the carrier can be minimized. Consequently, the decrease in the purifying characteristics can be minimized.

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Saitama-ken, Japan

Toshiya Kunisaki