Toyota Jidosha Kabushiki Kaisha

Rui Imoto

Masao Watanabe

Naoki Hasegawa

Satoshi Nagao

Kazuhisa Yano

Kumiko Nomura

Tomohiro Takeshita

Daichi Sato

Masaya Ibe

Noriyuki Kitao

Yusaku Inatomi

Yuuki Kasama

Yunan Wang

Mesoporous carbon has a connecting structure in which primary particles made of carbon particles having primary pores with a primary pore diameter of less than 20 nm are connected. In the mesoporous carbon, the pore capacity of secondary pores with secondary pore diameters within a range of 20 nm to 100 nm, which is measured by a mercury intrusion method, is 0.42 cm/g or more and 1.34 cm/g or less. In addition, the mesoporous carbon has a linearity of 2.2 or more and 2.6 or less. An electrode catalyst for a fuel cell includes the mesoporous carbon and catalyst particles supported in the primary pores in the mesoporous carbon. Furthermore, a catalyst layer includes the electrode catalyst for the fuel cell and a catalyst layer ionomer.

Mesoporous carbon, electrode catalyst for fuel cell, catalyst layer, fuel cell, and method for producing mesoporous carbon

Mesoporous carbon has a beaded structure in which primary particles with mesopores are linked. In the mesoporous carbon, an average primary particle size is 7 nm or more and 300 nm or less, a pore diameter is 2 nm or more and 10 nm or less, an average thickness of pore walls is 3 nm or more and 15 nm or less, a pore volume is 0.2 mL/g or more and 3.0 mL/g or less, and a tap density is 0.03 g/cmor more and 0.3 g/cmor less. In a polymer electrolyte fuel cell, the mesoporous carbon is used as a catalyst carrier for at least an air electrode catalyst layer. The mesoporous carbon can be obtained by impregnating mesoporous silica satisfying a predetermined condition with a carbon source, performing polymerization and carbonization, and removing a template.

Mesoporous carbon and manufacturing method of the same, and polymer electrolyte fuel cell

To provide an exhaust gas catalyst using a fired aluminum phosphate body with more excellent performance, and a method for producing it. (1) An exhaust gas purification catalyst including at least one platinum-group metal selected from the group consisting of Pt, Rh and Pd having a mean particle diameter of between 0.50 nm and 2.0 nm, supported on a tridymite-type fired aluminum phosphate body. (2) A method for producing an exhaust gas purification catalyst, including the steps of: firing aluminum phosphate obtained from an aqueous solution prepared to a pH of 3.5 to 4.5, at a temperature of between 1000&#xb0; C. and 1200&#xb0; C. for 2 hours or longer, to obtain a fired aluminum phosphate body, and supporting at least one type of platinum-group metal selected from the group consisting of Pt, Rh and Pd on the fired aluminum phosphate body.

Catalyst for exhaust gas purification, and method for producing same

An exhaust-gas catalyst carrier made of a composite of &#x3b8;-alumina and a zirconia-titania solid solution, an exhaust-gas catalyst employing the exhaust-gas catalyst carrier, and a method of manufacturing the exhaust-gas catalyst carrier are provided.

Exhaust gas catalyst carrier, exhaust gas catalyst employing the exhaust gas catalyst carrier, and method of manufacturing the exhaust gas catalyst carrier

An exhaust gas purifying catalyst, which is obtained by having at least one platinum group metal selected from the group consisting of Pt, Rh, and Pd supported on a calcined aluminum phosphate body. The calcined aluminum phosphate body has a tridymite crystal structure and the ratio of the cumulative pore distribution of pores having a size of 10 nm or less to the cumulative pore distribution of pores having a size of 300 nm or less is 20% or more in the calcined aluminum phosphate body. A method for producing an exhaust gas purifying catalyst including calcining aluminum phosphate, which has been obtained from an aqueous solution that is controlled to have a pH within a predetermined range, at a predetermined temperature for a predetermined period of time, thereby obtaining a calcined aluminum phosphate body; and having at least one platinum group metal selected from the group consisting of Pt, Rh, and Pd supported on the calcined aluminum phosphate body.

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Susono, Japan

Rui Imoto