Abstract: 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 m2/g; and a fuel cell comprising the electrode catalyst for a fuel cell.

Abstract: The fuel cell includes a first separator electrically insulated from an anode, a first conductive member connected to the anode and passing through the first separator while being electrically insulated from the first separator, a second separator electrically insulated from the cathode, and a second conductive member connected to the cathode and passing through the second separator while being electrically insulated from the second separator.

Abstract: A leak inspection method includes: a gas confining step of confining a fuel gas with a predetermined pressure in a fuel gas flow field; a gas supply step of continuing to supply an oxygen-containing gas with a pressure equal to or higher than a predetermined pressure or equal to or lower than the predetermined pressure to an oxygen-containing gas flow field; and a measurement step of measuring the amount of pressure change per unit time of the gas confined in the gas confining step, when a switch provided to a wiring connecting an anode and a cathode without passing through an electrolyte membrane is in an OFF state.

Abstract: The present invention relates to an electrode catalyst for a fuel cell that includes a carbon support (11) having pores (13) and catalyst particles containing platinum or a platinum alloy supported on the carbon support (11). The pores (13) of the carbon support (11) have a mode size of pores (13) in a range of 2.1 nm to 5.1 nm. A total pore volume of the pores (13) of the carbon support (11) is in a range of 21 cm3/g to 35 cm3/g. A distance between the catalyst particles and a surface of the carbon support (11) is in a range of 2.0 nm to 12 nm as a distance of a 50% cumulative frequency.

Abstract: 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 m2/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.

Abstract: 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 IA derived from an amorphous structure to a peak intensity IG derived from a graphite structure in an X-ray diffraction spectrum (ratio IA/IG) of 0.90 or less as a catalyst-supporting carrier.

Abstract: 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 m2/g; and a fuel cell comprising the electrode catalyst for a fuel cell.

Abstract: The present invention relates to an electrode catalyst for a fuel cell that includes a carbon support (11) having pores (13) and catalyst particles containing platinum or a platinum alloy supported on the carbon support (11). The pores (13) of the carbon support (11) have a mode size of pores (13) in a range of 2.1 nm to 5.1 nm. A total pore volume of the pores (13) of the carbon support (11) is in a range of 21 cm3/g to 35 cm3/g. A distance between the catalyst particles and a surface of the carbon support (11) is in a range of 2.0 nm to 12 nm as a distance of a 50% cumulative frequency.

Abstract: 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 IA derived from an amorphous structure to a peak intensity IG derived from a graphite structure in an X-ray diffraction spectrum (ratio IA/IG) of 0.90 or less as a catalyst-supporting carrier.

Abstract: [Problem] The present invention has as its object the provision of an electrode catalyst for fuel cell with a high initial activity of the electrode catalyst and able to maintain that activity over a long period of time and a method of producing the same. [Solution] The present invention relates to an electrode catalyst for fuel cell, comprising catalyst metal particles containing platinum or a platinum alloy and carrier particles supporting the catalyst metal particles, wherein the carrier particles are made of a carbonaceous material with a BET specific surface area of 700 m2/g or more, wherein the catalyst metal particles have an average particle size of 2.5 to 4.5 nm, and wherein a standard deviation of the particle size of the catalyst metal particles is 1.30 nm or less.

Abstract: There are provided a catalyst layer for a fuel cell electrode and a method of producing the same. The catalyst layer for a fuel cell electrode includes a metal-supported catalyst including a carbon carrier and a metal catalyst supported on the carbon carrier and a fluororesin ionomer. A value obtained when a primary particle diameter of the carbon carrier measured with an SEM, a pH value of the metal-supported catalyst measured by a specific method, and a ratio between a weight of the fluororesin ionomer and a weight of the carbon carrier of the metal-supported catalyst are applied to a specific formula is a certain value or more.