Cataler Corporation

Toyota Jidosha Kabushiki Kaisha

Susumu Enomoto

Hiroaki Takahashi

Tomoaki Terada

Takahiro Nagata

Toshiharu Tabata

Yosuke Horiuchi

Tetsuo Kawamura

Sozaburo Ohashi

Yousuke Horiuchi

Hideyasu Kawai

A conductive carbon carrier for a fuel cell having at least a surface layer graphitized, characterized in that the dimension (La) in a six-membered ring face (carbon plane) direction of a crystallite measured by X-ray diffraction is 4.5 nm or more. This carbon carrier improves the durability in a fuel cell and enables operation for a long period of time.

Conductive carbon carrier for fuel cell, electrode catalyst for fuel cell and solid polymer fuel cell comprising same

An object of the present invention is to reduce the amount of catalytic metal such as Pt in a fuel cell. The present invention provides a fuel cell electrode catalyst comprising a conductive carrier and catalytic metal particles, wherein the CO adsorption amount of the electrode catalyst is at least 30mL/g&#xb7;Pt.

Fuel cell electrode catalyst with reduced noble metal amount and solid polymer fuel cell comprising the same

To provide a production process of an electrode catalyst for fuel cell whose initial voltage is high and whose endurance characteristics, especially, whose voltage drop being caused by high-potential application is less. A production process according to the present invention of an electrode catalyst for fuel cell is characterized in that: it includes: a dispersing step of dispersing a conductive support in a solution; a loading step of dropping a platinum-salt solution, a base-metal-salt solution and an iridium-salt solution to the resulting dispersion liquid, thereby loading respective metallic salts on the conductive support as hydroxides under an alkaline condition; and an alloying step of heating the conductive support with metallic hydroxides loaded in a reducing atmosphere to reduce them, thereby alloying them.

Production process of electrode catalyst for fuel cell

Growing community of inventors

Kakegawa, Japan

Susumu Enomoto