Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Nippon Steel Chemical & Material Co., Ltd.

Mikihiro Kataoka

Kotaro Horiai

Tetsuo Nagami

Tomoaki Terada

Hiromitsu Tanaka

Nobuaki Mizutani

Yusuke Itoh

Toru Yamamoto

Mikihiro Hori

Tomohiro Ishida

Kenji Yamamoto

Yuki Makino

Yosuke Horiuchi

Sozaburo Ohashi

Takahiro Nagata

Akihiro Hori

Kohei Koyamada

Yuusuke Itou

An electrode catalyst for a fuel cell, the electrode catalyst having high initial activity and being capable of long-term retention of said activity; and a fuel cell using the electrode catalyst for a fuel cell. The electrode catalyst for a fuel cell includes catalyst metal particles that include platinum or a platinum alloy, and carrier particles that carry said catalyst metal particles, wherein the carrier particles are a carbonaceous material having a cumulative pore volume of 0.10 cc/g or less in the diameter range of 2 nm or less, and a BET specific surface area of greater than 900 m/g; and a fuel cell comprising the electrode catalyst for a fuel cell.

Electrode catalyst for fuel cell, and fuel cell using same

The present invention relates to an electrode catalyst for a fuel cell that includes a carbon support () having pores () and catalyst particles containing platinum or a platinum alloy supported on the carbon support (). The pores () of the carbon support () have a mode size of pores () in a range of 2.1 nm to 5.1 nm. A total pore volume of the pores () of the carbon support () is in a range of 21 cm/g to 35 cm/g. A distance between the catalyst particles and a surface of the carbon support () is in a range of 2.0 nm to 12 nm as a distance of a 50% cumulative frequency.

Electrode catalyst for fuel cell, method of producing the same, and fuel cell

An electrode catalyst and a method for producing the electrode catalyst are described, in which the electrode catalyst includes catalyst metal particles containing platinum or a platinum alloy, and carrier particles supporting the catalyst metal particles. The carrier particles are made of a carbonaceous material with a BET specific surface area of 700 m/g or more. The catalyst metal particles have an average particle size of 2.5 to 4.5 nm, and a standard deviation of the particle size of the catalyst metal particles is 1.30 nm or less. The electrode catalyst has a high initial activity and is able to maintain that activity over a long period of time.

Electrode catalyst for fuel cell and method of production of same

An electrode catalyst for fuel cells that can inhibit an increase in gas diffusion resistance includes a carbon material having a ratio of a peak intensity Iderived from an amorphous structure to a peak intensity Iderived from a graphite structure in an X-ray diffraction spectrum (ratio I/I) of 0.90 or less as a catalyst-supporting carrier.

Electrode catalyst for fuel cells

An electrode catalyst for a fuel cell including: a carbon support; and catalytic metal supported on the carbon support, the catalytic metal being selected from platinum or a platinum alloy, in which the carbon support has a crystallite size of (002) plane of carbon within a range of 5.0 nm or more and has a specific surface area within a range of 95 m/g to 170 m/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Electrode catalyst for fuel cell and method of producing the same, and cathode, anode, and fuel cell including electrode catalyst

Provided is an electrode catalyst for a fuel cell including: a carbon support; and catalytic metal supported on the carbon support, the catalytic metal being selected from platinum or a platinum alloy, in which the carbon support has a crystallite size of (002) plane of carbon within a range of 5.0 nm or more and has a specific surface area within a range of 95 m/g to 170 m/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

A method for producing an electrode catalyst for a fuel cell is provided. The electrode catalyst includes a carbon support and a catalyst supported on the carbon support. The catalyst is one of platinum and a platinum-alloy. The method includes supporting the catalyst on the carbon support; and treating the carbon support carrying the catalyst with a nitric acid and cleaning the treated carbon support, such that an amount of an acid present on the carbon support becomes in a range from 0.7 mmol to 1.31 mmol of the acid per gram of the electrode catalyst.

Growing community of inventors

Kakegawa, Japan

Mikihiro Kataoka