Toyota Jidosha Kogyo Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Cataler Industrial Co., Ltd.

Cataler Industrical Co. Ltd.

Masayasu Sato

Yoshihiro Suzuki

Hiroo Kinoshita

Shinichi Matsumoto

Naoto Miyoshi

Shoji Saruhashi

Masanori Ohara

A catalyst for the purification of exhaust gases capable of maintaining excellent durability at elevated temperatures and preventing the formation of LaAlO.sub.3, comprises a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients carried on the catalyst carrier layer. The catalyst carrier layer comprises oxides of lanthanum and cerium in which the molar fraction of lanthanum atoms to the total rare earth atoms is 0.05 to 0.20, and the ratio of the member of the total rare earth atoms to the number of aluminum atoms is 0.05 to 0.25.

Catalyst for the purification of exhaust gases

A monolithic catalyst, for the purification of exhaust gases from an internal combustion engine, comprising: an inert carrier; a film of alumina and rare earth oxides coated onto the surface of said inert carrier, wherein Ce and La are present in said film at an atomic ratio of Ce/La of 0.05-0.3 and the total content of rare earth oxides in said film is 2-50 wt. %, measured as R.sub.2 O.sub.3, wherein R is an element of the lanthanide series of the Periodic Table; and said film carries a catalyst component containing at least one element of the platinum family.

Monolithic catalyst for exhaust gas purification

Exhaust gas purifying catalyst characterized in that a carrier carries as the catalytic elements, a Pt-family element or elements containing over 50 weight % of Pt and an alkaline metal in proportions of 0.001.about.1 mole per 1 kg of catalyst; or the carrier carries Ce additionally.

Exhaust gas purifying catalyst

Growing community of inventors

Shizuoka, Japan

Masayasu Sato