Method for producing metal nanoparticles, method for producing membrane electrode assembly, and method for producing polymer electrolyte fuel cell
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsHiroshi Yano, Tomotaka Saito, Kota Iwasaki
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Abstract
Provided is a method for producing metal nanoparticles, which enables metal nanoparticles to be more conveniently produced. The method for producing metal nanoparticles includes spraying and drying a mixture to form metal nanoparticles, the mixture containing a metal salt and at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms.
Claims11
A method for producing metal nanoparticles, the method comprising:
- spraying and drying a mixture to form metal nanoparticles, the mixture containing a metal salt and at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms;
- wherein the metal salt is at least one selected from hexachloroplatinic (IV) acid hexahydrate (H2PtCl6·6H2O), tetraamminedichloroplatinum, and platinum bromide (IV) (PtBr4),
- wherein the atmospheric temperature during spraying is 10° C. or higher and 80° C. or lower,
- wherein the concentration of the metal salt is 0.1 mol·L−1 or more and 50 mol·L−1 or less, and
- wherein the metal nanoparticles have an average particle diameter of 0.7 nm or more and less than 2 nm.
A method for producing metal nanoparticles, the method comprising:
- forming a mixture by mixing a metal salt with at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms;
- and
- spraying the mixture,
- wherein the mixture in the form of mist is dried, and the metal salt is reduced to form metal nanoparticles, and
- wherein the metal salt is at least one selected from hexachloroplatinic (IV) acid hexahydrate (H2PtCl6·6H2O), tetraamminedichloroplatinum, and platinum bromide (IV) (PtBr4),
- wherein the atmospheric temperature during spraying is 10° C. or higher and 80° C. or lower,
- wherein the concentration of the metal salt is 0.1 mol·L−1 or more and 50 mol·L−1 or less, and
- wherein the metal nanoparticles have an average particle diameter of 0.7 nm or more and less than 2 nm.
A method for producing a membrane electrode assembly having a polymer electrolyte membrane and an electrode, the method comprising:
- forming the electrode containing the metal nanoparticles on a surface of the polymer electrolyte membrane by spraying a mixture of a metal salt, at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms, and a support to the polymer electrolyte membrane and drying the mixture to form the metal nanoparticles,
- wherein the metal salt is at least one selected from hexachloroplatinic (IV) acid hexahydrate (H2PtCl6·6H2O), tetraamminedichloroplatinum, and platinum bromide (IV) (PtBr4),
- wherein the atmospheric temperature during spraying is 10° C. or higher and 80° C. or lower,
- wherein the concentration of the metal salt is 0.1 mol·L−1 or more and 50 mol·L−1 or less, and
- wherein the metal nanoparticles have an average particle diameter of 0.7 nm or more and less than 2 nm.
A method for producing a polymer electrolyte fuel cell including a membrane electrode assembly having a polymer electrolyte membrane and an electrode, the method comprising:
- forming the electrode containing metal nanoparticles on a surface of the polymer electrolyte membrane by spraying a mixture of a metal salt, at least one solvent selected from alcohols having 1 or more and 5 or less carbon atoms, and a support to the polymer electrolyte membrane and drying the mixture to form the metal nanoparticles,
- wherein the metal salt is at least one selected from hexachloroplatinic (IV) acid hexahydrate (H2PtCl6·6H2O), tetraamminedichloroplatinum, and platinum bromide (IV) (PtBr4),
- wherein the atmospheric temperature during spraying is 10° C. or higher and 80° C. or lower,
- wherein the concentration of the metal salt is 0.1 mol·L−1 or more and 50 mol·L−1 or less, and
- wherein the metal nanoparticles have an average particle diameter of 0.7 nm or more and less than 2 nm.
Dependencies are inferred from the claim text.