Abstract: A fuel cell electrode catalyst includes: a noble-metal-supported catalyst including a carbon support and a noble metal supported on the carbon support; and a water-repellent material with which the noble-metal-supported catalyst is modified. The carbon support is mesoporous carbon in which a pore volume of pores having a pore size of 2 nm to 5 nm is 2.1 ml/g to 2.4 ml/g. An amount of the water-repellent material is 3% by weight to 7% by weight with respect to a total weight of the mesoporous carbon and the water-repellent material.

Abstract: 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 m2/g to 170 m2/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Abstract: 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 m2/g to 170 m2/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Abstract: 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 m2/g to 170 m2/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Abstract: 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.

Abstract: A production method of a fuel cell electrode catalyst includes: a supporting step of causing platinum and yttrium to be supported on a carrier using a nonaqueous solvent; and an acid treatment step of performing an acid treatment on the carrier on which platinum and yttrium are supported.

Abstract: A fuel cell electrode catalyst includes: a noble-metal-supported catalyst including a carbon support and a noble metal supported on the carbon support; and a water-repellent material with which the noble-metal-supported catalyst is modified. The carbon support is mesoporous carbon in which a pore volume of pores having a pore size of 2 nm to 5 nm is 2.1 ml/g to 2.4 ml/g. An amount of the water-repellent material is 3% by weight to 7% by weight with respect to a total weight of the mesoporous carbon and the water-repellent material.

Abstract: A core-shell composite material may include a core consisting of Nb-doped TiO2 of formula TiNbOx; and a shell consisting of a homogeneous layer of Pt or Pt alloy of 1 to 50 ML in thickness. The core-shell composite material may in particular find application in fuel cells.

Abstract: An electrode catalyst for a fuel cell includes: a carbon support having a crystallite diameter of 2.0 nm to 3.5 nm at a carbon (002) plane, and having a specific surface area of 400 m2/g to 700 m2/g; and a catalyst metal containing platinum and a platinum alloy that are supported on the carbon support, and having a crystallite diameter of 2.7 nm to 5.0 nm at a platinum (220) plane. A ratio of a peak height of a spectrum of the platinum alloy in a form of an intermetallic compound with respect to a peak height of a spectrum of platinum is 0.03 to 0.08. The spectrum of the platinum alloy and the spectrum of platinum are measured through X-ray diffraction.

Abstract: 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.

Abstract: An object of the present invention is to provide a supported catalyst for a fuel cell having a high activity, a method of manufacturing thereof, and a fuel cell including the supported catalyst for a fuel cell. A supported catalyst for a fuel cell of the present invention includes a conductive carrier and catalyst particle supported on the conductive carrier and contains platinum. The ratio of the mass of oxygen to the mass of the catalyst particle measured by using an inert gas fusion-nondispersive infrared absorption method is 4 mass % or less.

Abstract: 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 m2/g to 170 m2/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Abstract: The present invention concerns a core-shell composite material comprising: a core consisting of Nb-doped TiO2 of formula TiNbOx; and a shell consisting of a homogeneous layer of Pt or Pt alloy of 1 to 50 ML in thickness. The core-shell composite material may in particular find application in fuel cells.

Abstract: The invention relates to methods and structures of metal particles on a support material, including platinum-containing nanoparticles on a carbon support. Such materials can be used as electrocatalysts, for example as improved electrocatalysts in polymer electrolyte membrane fuel cells (PEM-FCs).

Abstract: An object of the present invention is to develop a support for PEMFC electrocatalyst with enhanced electrical conductivity and stability in acidic environment.

Abstract: The invention relates to methods of preparing metal particles on a support material, including platinum-containing nanoparticles on a carbon support. Such materials can be used as electrocatalysts, for example as improved electrocatalysts in polymer electrolyte membrane fuel cells (PEM-FCs).

Abstract: An object of the present invention is to provide a supported catalyst for a fuel cell having a high activity, a method of manufacturing thereof, and a fuel cell including the supported catalyst for a fuel cell. A supported catalyst for a fuel cell of the present invention includes a conductive carrier and catalyst particle supported on the conductive carrier and contains platinum. The ratio of the mass of oxygen to the mass of the catalyst particle measured by using an inert gas fusion-nondispersive infrared absorption method is 4 mass % or less.

Abstract: The present invention specifies the physical property valves of a catalytic layer correlating with the performance of a fuel cell, and provides the catalytic layer having the physical proper values and a fuel cell. Specifically, in a fuel cell having a membrane-electrode assembly provided with a catalytic layer 13 on each side of an electrolyte membrane 10, an electrode powder constituting the catalytic layer 13 shall have an amount of adsorbed water vapor in a range of 52 to 70 cm3(STP)/g by a value measured when the water-vapor partial pressure is 0.6, which is determined from the adsorption isotherm of water. The fuel cell having the catalytic layer with the use of the electrode powder having the amount of adsorbed water vapor in this range has the output performance of 0.6 A/cm2 or higher by current density at 0.6 V, in a less humidified condition and a more humidified condition.

Abstract: This invention provides a highly stable electrocatalyst having excellent electrochemical properties, which comprises a support containing a composite oxide containing Sb-doped SnO2 and a catalyst supported by the support, wherein the composite oxide is an amorphous composite oxide and the percentage of Sb with respect to the sum of Sb and Sn in the composite oxide is 2 to 10 at. %, or wherein the composite oxide is a crystalline composite oxide and the percentage of Sb with respect to the sum of Sb and Sn in the composite oxide is 1 to 3 at. %.

Abstract: An electrode catalyst for a fuel cell, which has improved performance compared with conventional platinum alloy catalysts, a method for producing the electrode catalyst, and a polymer electrolyte fuel cell using the electrode catalyst are provided. The electrode catalyst for a fuel cell comprises a noble-metal-non-precious metal alloy that has a core-shell structure supported on a conductive carrier. The composition of the catalyst components of the shell is such that the amount of the noble metal is greater than or equal to the amount of the non-precious metal.