Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Yoshihide Watanabe

Tomoyoshi Motohiro

Yasuhiko Takeda

Shoji Noda

Shinichi Matsumoto

Akihiko Suda

Mareo Kimura

Tetsushi Ohmura

A catalyst for purification of automobile exhaust gas comprising: a support and rhodium supported on the support in an atomic state, wherein an amount of the rhodium supported is 0.05 to 0.30% by mass relative to the total amount of the support and the rhodium, 50 at. % or more of the rhodium is supported on the support as two-atom clusters of rhodium, and an average distance between adjacent ones of the two-atom clusters is 1.0 nm or more.

Catalyst for purification of automobile exhaust gas and method for manufacturing the same

An anisotropic nanophase composite material and a method of producing same. The composite material comprises a nanophase composite structure containing a multiplicity of particulates of at least one material. The particulates of one material are spaced from each other three-dimensionally and anisotropically oriented in a given direction. The particulates have an average thickness of 1 to 10 nanometers and an average length of not less than 10 nanometers, the length being larger than the thickness. Since the particulates of dimensions on the order of nanometers are oriented only in a given direction, the composite material produces an intensified nonlinear optical effect and is excellent in polarizing characteristics, birefringent characteristics, or photovoltaic characteristics.

Anisotropic nanophase composite material and method of producing same

A catalyst used for purifying exhaust gases resulting from the combustion of a lean fuel-air mixture mixture comprises a porous support material having a framework formed by MO.sub.2, where M is silicon or a metal, AlO.sub.2 and PO.sub.2, and at least one base metal and at least one metal of the platinum group which are carried on ion exchange sites of the support material a coexistent state. The catalyst exhibits a high level of NO.sub.x conversion for a long time even at a high temperature owing to the high heat resistance and durability of the support material, and the cooperative action of the two kinds of metals, i.e. the promotion of the catalytic action of the base metal (e.g. copper) by the metal of the platinum group (e.g. palladium) serving as cocatalyst.

Catalyst for purification of exhaust gases

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Aichi, Japan

Yoshihide Watanabe