US 7,396,797 B2 · Production method of catalyst for fuel cell and of fuel cell, and catalyst for fuel cell and fuel cell

Abstract

A method for producing a catalyst for a fuel cell is provided which is capable of improving output characteristics of the fuel cell. Metal fine particles making up the catalyst for the fuel cell to be used as a fuel electrode and air electrode are formed by reducing platinum salt with molybdenum carbonyl. The catalyst for the fuel cell is formed by supporting platinum-molybdenum fine particles on carbon particles. By employing this reducing method, platinum-molybdenum fine particles being small in size and high in dispersibility can be obtained, making the catalyst for the fuel cell highly active. By constructing the fuel and air electrodes using the catalyst for the fuel cell, high outputs from the fuel cell are made possible.

Claims25

Dependent claims

A catalyst for a fuel cell obtained by supporting metal fine particles on a supporter to be used as an electrode for said fuel cell, comprising:

metal fine particles obtained by reducing platinum salt with metal carbonyl of a metal being different from said platinum and containing said platinum and said metal;
and supporter particles to be used as a supporter,
wherein said metal carbonyl includes two or more kinds of metal carbonyl selected from the group consisting of molybdenum carbonyl, cobalt carbonyl, iron carbonyl, rhodium carbonyl, and ruthenium carbonyl.

A method for producing a fuel cell using, as its electrode, a catalyst obtained by supporting metal fine particles on a supporter, comprising the process of:

forming a catalyst by supporting said metal fine particles containing platinum and a metal being different from said platinum and being obtained by reducing platinum salt with metal carbonyl of said metal being different from said platinum on supporter particles to be used as a supporter;
forming a layer of said catalyst on at least one surface of an electrolyte layer and constructing electrodes on both surfaces of the electrolyte layer;
providing outside of each of the electrodes with a current collector;
and
providing a means for supplying oxygen to one of the electrodes and a means for supplying fuel to another of the electrodes,
wherein said metal carbonyl includes two or more kinds of metal carbonyl selected from the group consisting of molybdenum carbonyl, cobalt carbonyl, iron carbonyl, rhodium carbonyl, and ruthenium carbonyl.

3 more elements

Dependencies are inferred from the claim text.

Production method of catalyst for fuel cell and of fuel cell, and catalyst for fuel cell and fuel cell

Life of this patent

Production method of catalyst for fuel cell and of fuel cell, and catalyst for fuel cell and fuel cell

Life of this patent

Abstract

Claims25