Patent application number | Description | Published |
20120010069 | METHOD OF PRODUCING CORE-SHELL CATALYST PARTICLE AND CORE-SHELL CATALYST PARTICLE PRODUCED BY THIS PRODUCTION METHOD - A method of producing a core-shell catalyst particle, the method including: preparing a core particle that contains an alloy including a first core metal having a standard electrode potential of at least 0.6 V and a second core metal having a standard electrode potential lower than that of the first core metal; eluting the second core metal at least at a surface of the core particle, the elution being carried out under conditions at which an equilibrium is maintained for the first core metal between a metal state and a hydroxide and at which an equilibrium is maintained for the second core metal between a metal state and a metal ion; and, with the core particle being designed as a core portion, coating this core portion with a shell portion after the elution of the second core metal. | 01-12-2012 |
20120208105 | FUEL CELL ELECTROCATALYTIC PARTICLE AND METHOD FOR PRODUCING THE SAME - Disclosed is a catalyst particle having high catalyst activity and a method for producing the catalyst particle. | 08-16-2012 |
20130022899 | CORE-SHELL TYPE METAL NANOPARTICLES AND METHOD FOR PRODUCING THE SAME - Core-shell type metal nanoparticles including a core portion and a shell portion covering the core portion, wherein the core portion includes a core metal material selected from metals and alloys, and wherein the shell portion includes an alloy of a first shell metal material and a second shell metal material. | 01-24-2013 |
20130029248 | FUEL CELL - A fuel cell including a single fuel cell which includes a membrane electrode including a polymer electrolyte membrane, an anode electrode on one surface of the polymer electrolyte membrane, and a cathode electrode on another surface of the polymer electrolyte membrane, the anode electrode including an anode catalyst layer and a gas diffusion layer and the cathode electrode including a cathode catalyst layer and a gas diffusion layer. At least one of the anode cathode catalyst layers includes core-shell type catalyst particles, each having a core and a shell covering the core and including a shell metallic material. At least one of the polymer electrolyte membrane, anode catalyst layer, gas diffusion layer at the anode side, cathode catalyst layer and gas diffusion layer at the cathode side includes metallic nanoparticles having an average particle diameter different from that of the core-shell type catalyst particles and including the shell metallic material. | 01-31-2013 |
20130029842 | CORE-SHELL TYPE METAL NANOPARTICLES AND METHOD FOR PRODUCING THE SAME - The present invention provides core-shell type metal nanoparticles having a high surface coverage of the core portion with the shell portion, and a method for producing the same. Disclosed is core-shell type metal nanoparticles comprising a core portion comprising a core metal material and a shell portion covering the core portion, wherein the core portion substantially has no {100 } plane of the core metal material on the surface thereof. | 01-31-2013 |
20130059219 | FUEL CELL SYSTEM - A fuel cell system which prevents a reduction in catalyst activity, wherein at least one of the anode catalyst layer and the cathode catalyst layer includes a core-shell type catalyst particle having a core portion including a core metallic material and a shell portion covering the core portion and including a shell metallic material; and wherein the fuel cell system has: a means for storing an initial value of a ratio of the core metallic material to a surface area of the core-shell type catalyst particle, and a means for determining whether or not the ratio of the core metallic material to the surface area of the core-shell type catalyst particle is increased at a predetermined stage, compared to the initial value. | 03-07-2013 |
20130189607 | CATALYST PARTICLES, CARBON-SUPPORTED CATALYST PARTICLES AND FUEL CELL CATALYSTS, AND METHODS OF MANUFACTURING SUCH CATALYST PARTICLES AND CARBON-SUPPORTED CATALYST PARTICLES - A catalyst particle is composed of an inner particle and an outermost layer that includes platinum and covers the inner particle. The inner particle includes on at least a surface thereof a first oxide having an oxygen defect. | 07-25-2013 |
20140114628 | METHOD OF PREDICTING DEGRADATION OF FUEL CELL CATALYST USING THE METHOD OF CREATING PARTICLE SIZE DISTRIBUTION MODEL - A particle size distribution creating method includes a particle size range determining step, an integrating step of integrating the frequency of appearance of particles within the particle size range determined in the particle size range determining step, a division point determining step of determining particle sizes that provide division points, using the integral of the frequency of appearance obtained in the integrating step, and a typical point determining step of determining the minimum particle size, maximum particle size and the particle sizes of the division points as typical points. This method is characterized by assuming a particle size distribution which contains particles having the particle sizes of the respective typical points and is plotted such that the frequency of appearance of the particles having the particle size of each of the typical points is equal to the integral over each of the regions defined by the typical points, and obtaining the assumed particle size distribution as a particle size distribution model. | 04-24-2014 |
20140178575 | METHOD FOR PRODUCING FINE CATALYST PARTICLES, METHOD FOR PRODUCING CARBON-SUPPORTED FINE CATALYST PARTICLES, METHOD FOR PRODUCING CATALYST MIX AND METHOD FOR PRODUCING ELECTRODE - An object of the present invention is to provide a method for producing fine catalyst particles, a method for producing carbon-supported fine catalyst particles, a method for producing a catalyst mix, and a method for producing an electrode, all of which are configured to inhibit, when used in fuel cells, etc., performance deterioration during operation at especially high temperature. Disclosed is a method for producing fine catalyst particles each comprising a core particle and an outermost layer, the core particle containing palladium and the outermost layer containing platinum and covering the core particle, the method comprising the steps of: preparing palladium-containing particles; preparing an acid solution configured to dissolve palladium more preferentially than platinum; covering each palladium-containing particle with an outermost layer containing platinum; and bringing the palladium-containing particles each covered with the outermost layer into contact with the acid solution. | 06-26-2014 |
20140200133 | CORE-SHELL TYPE METAL NANOPARTICLES AND METHOD FOR PRODUCING THE SAME - The present invention provides core-shell type metal nanoparticles having a high surface coverage of the core portion with the shell portion, and a method for producing the same. Disclosed is core-shell type metal nanoparticles comprising a core portion comprising a core metal material and a shell portion covering the core portion, wherein the core portion substantially has no {100} plane of the core metal material on the surface thereof. | 07-17-2014 |