Abstract: The present invention relates to a catalyst for a solid polymer fuel cell, including platinum, cobalt, and zirconium supported as a catalytic metal on a carbon powder carrier, in which the supporting ratio of platinum, cobalt, and zirconium on the carbon powder carrier is Pt:Co:Zr=3:0.5 to 1.5:0.1 to 3.0 by molar ratio. In the present invention, it is preferable that the peak position of Pt3Co seen in the X-ray diffraction pattern of catalyst particles is 2?=41.10° or more and 42.00° or less, and moderate alloying has occurred in the catalytic metal.

Abstract: Provided are (i) a catalyst that has a core-shell structure and is highly active in an oxygen reduction reaction, which is a cathode reaction of a fuel cell, and (ii) a reaction acceleration method in which the catalyst is used. A core-shell catalyst for accelerating an oxygen reduction reaction, contains: silver or palladium as a core material; and platinum as a shell material, the core-shell catalyst having, on a surface thereof, a (110) surface of a face centered cubic lattice.

Abstract: Provided is a catalyst for solid polymer fuel cell that exhibits excellent initial activity and favorable durability and a method for manufacturing the same. The invention is a catalyst for solid polymer fuel cell which is formed by supporting catalyst particles including platinum, cobalt and manganese on a carbon powder carrier, wherein a composition ratio (molar ratio) among platinum, cobalt and manganese in the catalyst particles is Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, a peak intensity ratio of a Co—Mn alloy appearing in the vicinity of 2?=27° is 0.15 or less with respect to a main peak appearing in the vicinity of 2?=40° in X-ray diffraction analysis of the catalyst particles, and a fluorine compound having a C—F bond is supported at least on the surface of the catalyst particles. The amount of the fluorine compound supported is preferably from 3 to 20% with respect to the entire mass of the catalyst.

Abstract: The invention is a catalyst for solid polymer fuel cell having catalyst particles composed of platinum, cobalt and magnesium supported on a carbon powder carrier, in which a composition ratio (molar ratio) among platinum, cobalt and magnesium in the catalyst particles is Pt:Co:Mg=1:0.4 to 0.5:0.00070 to 0.00095. This catalyst is manufactured by supporting cobalt and magnesium on a platinum catalyst and then conducting a heat treatment and a treatment to be brought into contact with an oxidizing solution, the feature of the catalyst manufactured in this manner includes a peak position of a main peak appearing between 2?=40° and 42° in X-ray diffraction analysis, and the peak position is shifted to from 41.0° to 41.5°.

Abstract: A method for forming catalyst particles, each of which has a core/shell structure, by a Cu-UPD method. Namely, a method of manufacturing a catalyst wherein catalyst particles, each of which has a core/shell structure composed of a shell layer that is formed of platinum and a core particle that is covered with the shell layer and is formed of a metal other than platinum, are supported on a carrier. This method is characterized by comprising: an electrolysis step wherein the carrier supporting the core particles is electrolyzed in an electrolytic solution containing copper ions, so that copper is precipitated on the surfaces of the core particles; and a substitution reaction step wherein a platinum compound solution is brought into contact with the core particles, on which copper has been precipitated, so that the copper on the surface of each core particle is substituted by platinum, thereby forming a shell layer that is formed of platinum.

Abstract: The present invention provides a catalyst for a solid polymer fuel cell, having excellent initial activity and good durability and a production method thereof. The present invention is a catalyst for a solid polymer fuel cell, including catalyst particles composed of platinum or a platinum alloy supported on a carbon powder carrier, the catalyst having sulfo groups (—SO3H) at least on the catalyst particles, and the catalyst further having a fluorine compound having a C—F bond supported at least on the catalyst particles. It is preferred in the catalyst of the present invention that sulfur content is 800 ppm or more and 5000 ppm or less based on the mass of the whole catalyst and the amount of the fluorine compound is 3 mass % or more and 24 mass % or less based on the mass of the whole catalyst.

Abstract: The present invention aims to provide a catalyst that makes it possible to reduce an amount of solid electrolyte mixed and improve initial performance of a fuel cell, and also a method for producing the catalyst. The present invention relates to a catalyst for a solid polymer fuel cell, which has sulfo groups (—SO3H) on catalyst particles. In TEM-EDX analysis, a ratio (IS/IPt) of a sulfur peak intensity (IS) to a platinum peak intensity (IPt) on the catalyst particles is within a range of 0.0044 or more and 0.0090 or less. The catalyst makes it possible to reduce the amount of solid electrolyte added and also a fuel cell with excellent initial performance, and thus contributes to a practical use of a fuel cell.

Abstract: The present invention provides a catalyst for a polymer electrolyte fuel cell including catalyst particles made of platinum supported on a carbon powder carrier, wherein the carbon powder carrier includes 0.7 to 3.0 mmol/g (based on the weight of the carrier) of a hydrophilic group bonded thereto; and the platinum particles have an average particle size of 3.5 to 8.0 nm and the platinum specific surface area based on CO adsorption (COMSA) of 40 to 100 m2/g. The catalyst for a polymer electrolyte fuel cell according to the present invention is a catalyst excellent in initial activity and satisfactory in durability.

Abstract: [Object] Provided is a catalyst having a high catalytic activity. [Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst support includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, a surface area formed by the pores having a radius of less than 1 nm is equal to or larger than a surface area formed by the pores having a radius of 1 nm or more, and an average particle diameter of the catalyst metal is 2.8 nm or more.

Abstract: Provided is a catalyst for solid polymer fuel cell that exhibits excellent initial activity and favorable durability and a method for manufacturing the same. The invention is a catalyst for solid polymer fuel cell which is formed by supporting catalyst particles including platinum, cobalt and manganese on a carbon powder carrier, wherein a composition ratio (molar ratio) among platinum, cobalt and manganese in the catalyst particles is Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, a peak intensity ratio of a Co—Mn alloy appearing in the vicinity of 2?=27° is 0.15 or less with respect to a main peak appearing in the vicinity of 2?=40° in X-ray diffraction analysis of the catalyst particles, and a fluorine compound having a C—F bond is supported at least on the surface of the catalyst particles. The amount of the fluorine compound supported is preferably from 3 to 20% with respect to the entire mass of the catalyst.

Abstract: The invention is a catalyst for solid polymer fuel cell having catalyst particles composed of platinum, cobalt and magnesium supported on a carbon powder carrier, in which a composition ratio (molar ratio) among platinum, cobalt and magnesium in the catalyst particles is Pt:Co:Mg=1:0.4 to 0.5:0.00070 to 0.00095. This catalyst is manufactured by supporting cobalt and magnesium on a platinum catalyst and then conducting a heat treatment and a treatment to be brought into contact with an oxidizing solution, the feature of the catalyst manufactured in this manner includes a peak position of a main peak appearing between 2?=40° and 42° in X-ray diffraction analysis, and the peak position is shifted to from 41.0° to 41.5°.

Abstract: The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a Co—Mn alloy appearing around 2?=27° is 0.15 or less on the basis of a main peak appearing around 2?=40°. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt3 alloy and an MnPt3 alloy appearing around 2?=32° of 0.14 or more on the basis of a main peak.

Abstract: The present invention provides a catalyst for a polymer electrolyte fuel cell including catalyst particles made of platinum supported on a carbon powder carrier, wherein the carbon powder carrier includes 0.7 to 3.0 mmol/g (based on the weight of the carrier) of a hydrophilic group bonded thereto; and the platinum particles have an average particle size of 3.5 to 8.0 nm and the platinum specific surface area based on CO adsorption (COMSA) of 40 to 100 m2/g. The catalyst for a polymer electrolyte fuel cell according to the present invention is a catalyst excellent in initial activity and satisfactory in durability.

Abstract: A solid polymer electrolyte fuel cell comprises: a plurality of electrode structures comprising an anode and a cathode, and polymer electrolyte membrane held between the anode and the cathode, and a plurality of separators for holding the respective electrode structures, with a fuel gas passage for supplying and discharging fuel gas containing hydrogen on a surface opposing the anode; and an oxidant gas passage for supplying and discharging oxidant gas on a surface opposing the cathode. The catalyst layer of the anode comprises a mixture of an ion conductive material, a platinum powder and/or platinum alloy powder and a carbon, the platinum powder and/or platinum alloy powder and carbon substantially exist independently from each other, and the catalyst layer of the cathode comprises a metal support mixture in which the ion conductive material and the electro-conductive material having the supported catalyst material are mixed.

Abstract: There is provided a catalyst for a fuel electrode of a solid polymer fuel cell, wherein the catalyst comprises fine precious metal particles loaded on a support composed of an electrically conductive material, and wherein the weight ratio of the fine precious metal particles and the support composed of an electrically conductive material (fine precious metal particles:electrically conductive material) is 60:40 to 95:5; and the fine precious metal particles satisfy the following conditions (a) to (c): (a) the fine precious metal particles contain platinum and ruthenium, and the mixing ratio thereof (platinum:ruthenium) is within a range between 1:1 and 1:3 in terms of molar ratio; (b) the fine precious metal particles have an average particle diameter of 3 to 10 nm; and (c) the fine precious metal particles contain oxygen, and the weight ratio of the fine precious metal particles and oxygen (fine precious metal particles:oxygen) is 86:14 to 96:4.

Abstract: There is provided a catalyst for a fuel electrode of a solid polymer fuel cell, wherein the catalyst comprises fine precious metal particles loaded on a support composed of an electrically conductive material, and wherein the weight ratio of the fine precious metal particles and the support composed of an electrically conductive material (fine precious metal particles:electrically conductive material) is 60:40 to 95:5; and the fine precious metal particles satisfy the following conditions (a) to (c): (a) the fine precious metal particles contain platinum and ruthenium, and the mixing ratio thereof (platinum:ruthenium) is within a range between 1:1 and 1:3 in terms of molar ratio; (b) the fine precious metal particles have an average particle diameter of 3 to 10 nm; and (c) the fine precious metal particles contain oxygen, and the weight ratio of the fine precious metal particles and oxygen (fine precious metal particles:oxygen) is 86:14 to 96:4.

Abstract: A solid polymer electrolyte fuel cell comprises: a plurality of electrode structures comprising an anode and a cathode, and polymer electrolyte membrane held between the anode and the cathode, and a plurality of separators for holding the respective electrode structures, with a fuel gas passage for supplying and discharging fuel gas containing hydrogen on a surface opposing the anode; and an oxidant gas passage for supplying and discharging oxidant gas on a surface opposing the cathode. The catalyst layer of the anode comprises a mixture of an ion conductive material, a platinum powder and/or platinum alloy powder and a carbon, the platium powder and/or platinum alloy powder and carbon substantially exist independently from each other, and the catalyst layer of the cathode comproses a metal support mixture in which the ion conductive material and the electro-conductive material having the supported catalyst material are mixed.