Method and device for producing a catalyst

Patent metadata

Field	Value
Publication number	US-2016218370-A1
Application number	US-201514979292-A
Country	US
Kind code	A1
Filing date	Dec 22, 2015
Priority date	Jan 22, 2015
Publication date	Jul 28, 2016
Grant date	—

Abstract

Disclosed is a method for producing a catalyst, wherein the method comprises: a supplying step of supplying a dispersion containing a palladium-containing fine particle from a supplying part into a reaction container; a preparing step of preparing a copper-palladium-containing complex in which at least part of a surface of the palladium-containing fine particle is covered with copper, by passing the dispersion through a reacting part and bringing the palladium-containing fine particle in the dispersion into contact with a copper-containing member in the reacting part; and a substituting step of substituting the copper in the copper-palladium-containing complex emitted from an emitting part with platinum by bringing the complex into contact with a platinum-containing solution.

First claim

The invention claimed is:

1 . A method for producing a catalyst comprising a fine catalyst particle which comprises a palladium-containing fine particle and a platinum-containing outermost layer covering at least part of the palladium-containing fine particle,
wherein a reaction container comprising (1) a supplying part, (2) a reacting part inside which one or more copper-containing members are provided, and (3) an emitting part is used; wherein at least part of a surface of the copper-containing member contains at least one copper-containing material selected from the group consisting of copper, a copper alloy and a copper compound; and wherein the method comprises:
a supplying step of supplying a dispersion containing the palladium-containing fine particle from the supplying part into the reaction container;
a preparing step of preparing a copper-palladium-containing complex in which at least part of a surface of the palladium-containing fine particle is covered with copper, by passing the dispersion through the reacting part and bringing the palladium-containing fine particle in the dispersion into contact with the copper-containing member in the reacting part; and
a substituting step of substituting the copper in the copper-palladium-containing complex emitted from the emitting part with platinum by bringing the complex into contact with a platinum-containing solution.

2 . The method for producing the catalyst according to claim 1 , wherein the dispersion and an inert gas are supplied from the supplying part into the reaction container.

3 . The method for producing the catalyst according to claim 2 , wherein at least the reacting part is a microreactor.

4 . The method for producing the catalyst according to claim 1 , wherein the dispersion contains the palladium-containing fine particle and an acid solution.

5 . The method for producing the catalyst according to claim 1 , wherein the catalyst is a catalyst for fuel cells.

6 . A device for producing a catalyst comprising a fine catalyst particle which comprises a palladium-containing fine particle and a platinum-containing outermost layer covering at least part of the palladium-containing fine particle,
wherein the device comprises a reaction container and a reaction vessel; wherein the reaction container comprises:
a supplying part for supplying a dispersion containing the palladium-containing fine particle into the reaction container;
a reacting part for preparing a copper-palladium-containing complex in which at least part of a surface of the palladium-containing fine particle is covered with copper, by bringing the palladium-containing fine particle in the dispersion supplied from the supplying part into contact with one or more copper-containing members provided inside the reacting part; and
an emitting part for emitting the copper-palladium-containing complex to the reaction vessel;
wherein at least part of a surface of the copper-containing member contains at least one copper-containing material selected from the group consisting of copper, a copper alloy and a copper compound; and wherein, in the reaction vessel, the copper in the copper-palladium-containing complex emitted from the emitting part is substituted with platinum by bringing the complex into contact with a platinum-containing solution.

7 . The device for producing the catalyst according to claim 6 , wherein the dispersion and an inert gas are supplied from the supplying part into the reaction container.

8 . The device for producing the catalyst according to claim 7 , wherein at least the reacting part is a microreactor.

9 . The device for producing the catalyst according to claim 6 , wherein the dispersion contains the palladium-containing fine particle and an acid solution.

10 . The device for producing the catalyst according to claim 6 , wherein the catalyst is a catalyst for fuel cells.

Assignees

• Toyota Motor Co Ltd
• Kobe Steel Ltd

Inventors

• Kitao Noriyuki
• Fujisawa Tsugio
• Matsuoka Akira
• Noishiki Koji
• Oozono Tomohiro

Classifications

• H01M4/92

  Metals of platinum group (H01M4/94 {, H01M4/9058} take precedence) · CPC title

• B01J2219/24

  Stationary reactors without moving elements inside · CPC title

• B01J2219/00891

  Feeding or evacuation · CPC title

• B01J19/0093

  Microreactors, e.g. miniaturised or microfabricated reactors (laboratory containers with capillary fluid transport in microfabricated channels or chambers B01L3/5027) · CPC title

• B01J19/24

  Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) · CPC title