Method of preparing a multi-component alloy catalyst

Patent metadata

Field	Value
Publication number	US-11065605-B2
Application number	US-201916572033-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Apr 2, 2019
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A method for preparing a multi-component alloy catalyst on which a catalytic metal is supported includes preparing a carbon composite having a carbon support coated with a cationic polymer, supporting a catalytic metal containing at least two metal elements on the carbon composite to prepare an alloy catalyst precursor, and washing the alloy catalyst precursor to remove the cationic polymer.

First claim

What is claimed is:

1. A method of preparing a multi-component alloy catalyst, the method comprising:
preparing a carbon composite having a carbon support coated with a cationic polymer;
supporting a catalytic metal containing at least two metal elements on the carbon composite to prepare an alloy catalyst precursor; and
washing the alloy catalyst precursor to remove the cationic polymer.

2. The method according to claim 1 , further comprising drying a result, free of the cationic polymer, under an inert gas atmosphere, after removal of the cationic polymer.

3. The method according to claim 1 , wherein the cationic polymer is selected from the group consisting of polyethylenimine (PEI), polyethylenimine ethoxylate (PEIE), poly-L-lysine (PLL) and a combination thereof.

4. The method according to claim 1 , wherein the carbon composite is prepared by adding the carbon support and the cationic polymer to a solvent at a weight ratio of 1:0.5 to 1:2, followed by stirring.

5. The method according to claim 1 , wherein the catalytic metal comprises:
platinum (Pt); and
at least one transition metal selected from the group consisting of copper (Cu), iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn), chromium (Cr) and a combination thereof.

6. The method according to claim 1 , wherein the catalytic metal comprises:
platinum (Pt);
copper (Cu); and
at least one transition metal selected from the group consisting of iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn), chromium (Cr) and a combination thereof.

7. The method according to claim 1 , wherein the preparing the alloy catalyst precursor comprises:
adding a transition metal precursor to a dispersion in which the carbon composite is dispersed;
adding a platinum precursor to the dispersion containing the transition metal precursor; and
reacting the dispersion containing the platinum precursor.

8. The method according to claim 7 , wherein the reaction is carried out at a temperature of 150 to 250° C. for 10 to 20 hours.

9. The method according to claim 1 , wherein the alloy catalyst precursor is washed with 60° C. to 70° C. distilled water to remove the cationic polymer.

10. The method according to claim 1 , wherein the multi-component alloy catalyst supports the catalytic metal in an amount of 60% by weight or more.

11. A method of manufacturing a membrane-electrode assembly, the method comprising:
preparing a multi-component alloy catalyst by the method according to claim 1 ;
coating release paper with the multi-component alloy catalyst to produce a catalyst layer; and
transferring the catalyst layer to an electrolyte membrane.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Jun Tae
• Park Ju Ahn

Classifications

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title

• H01M4/8828

  Coating with slurry or ink · CPC title

• H01M4/8814

  Temporary supports, e.g. decal · CPC title

• B01J23/8926 Primary

  Copper and noble metals · CPC title