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1. US20090202869 - CARBON PARTICLE HAVING DEPOSITED FINE PARTICLES, PROCESS FOR PRODUCING THE SAME, AND ELECTRODE FOR FUEL CELL

Office United States of America
Application Number 12304462
Application Date 12.06.2007
Publication Number 20090202869
Publication Date 13.08.2009
Publication Kind A1
IPC
H01M 4/02
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
B05D 7/24
BPERFORMING OPERATIONS; TRANSPORTING
05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
DPROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
7Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
24for applying particular liquids or other fluent materials
B32B 5/16
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
5Layered products characterised by the non-homogeneity or physical structure of a layer
16characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
Applicants SAWAKI YUKO
KISHIMOTO MIKIO
NAKANISHI HARUYUKI
MURATA SHIGEAKI
IMANISHI MASAHIRO
Inventors Sawaki Yuko
Kishimoto Mikio
Nakanishi Haruyuki
Murata Shigeaki
Imanishi Masahiro
Agents BIRCH STEWART KOLASCH & BIRCH
Priority Data 2006 164095 13.06.2006 JP
Title
(EN) CARBON PARTICLE HAVING DEPOSITED FINE PARTICLES, PROCESS FOR PRODUCING THE SAME, AND ELECTRODE FOR FUEL CELL
Abstract
(EN)

Carbon particles having fine particles deposited thereon which can be used as a substitute for the carbon particles having platinum deposited thereon and metallic platinum particles which are presently in general use as, e.g., a catalyst for electrodes in fuel cells. Compared to the conventional carbon particles having platinum deposited thereon, etc., the carbon particles are effective in greatly reducing the amount of platinum to be used. The carbon particles are characterized by comprising carbon particles and, deposited on the surface of the carbon particles, fine particles of a perovskite type composite metal oxide in each of which fine noble-metal particles are present throughout the whole particle. Also provided is a process for producing the carbon particles.

The carbon particles having deposited fine particles have a constitution in which fine particles of a perovskite type composite metal oxide each having fine noble-metal particles present throughout the whole perovskite type oxide particle and having a crystallite size of 1-20 nm are deposited on carbon particles. The process for producing such carbon particles having fine particles deposited thereon comprises preparing a solution containing fine perovskite type composite oxide particles and complex ions of a metal for constituting fine noble-metal particles, subsequently repeating the step of impregnating the solution into carbon particles and dried the particles to thereby adsorb complex ions of the metal onto the carbon particles, and then subjecting the resultant particles to heat treatment.