Method for preparing supported metal catalyst and supported metal catalyst prepared therefrom

Patent metadata

Field	Value
Publication number	US-11241682-B2
Application number	US-201916662767-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Feb 28, 2019
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

Disclosed is a method for preparing a metal catalyst composite. The method includes pre-treating a carbon support in a reactor, and depositing a metal precursor on the pre-treated carbon support. The pre-treating the carbon support may include exposing the carbon support to a nucleating agent, for example, titanium tetrachloride (TiCl 4 ), silicon tetrachloride (SiCl 4 ) and carbon tetrachloride (CCl 4 ).

First claim

What is claimed is:

1. A method for preparing a metal catalyst composite, comprising:
pre-treating a carbon support in a reactor; and
depositing a metal precursor on the pre-treated carbon support,
wherein the pre-treating of the carbon support comprises exposing the carbon support to a nucleating agent.

2. The method of claim 1 , wherein the nucleating agent is one or more selected from the group consisting of titanium tetrachloride (TiCl 4 ), silicon tetrachloride (SiCl 4 ) and carbon tetrachloride (CCl 4 ).

3. The method of claim 1 , wherein, an inner pressure of the reactor is maintained at about 10 −10 Torr to 1 Torr.

4. The method of claim 1 , wherein the carbon support comprises carbon black.

5. The method of claim 1 , wherein in the pre-treating, the carbon support is exposed to the nucleating agent for about 10 minutes to 20 minutes.

6. The method of claim 1 , wherein the pre-treating of the carbon support comprises heating the reactor.

7. The method of claim 6 , wherein, in the pre-treating of the carbon support, an inner temperature of the reactor is within a range of about 200° C. to 400° C.

8. The method of claim 7 , wherein, in the pre-treating of the carbon support, the inner temperature of the reactor is maintained for about 30 minutes to 3 hours.

9. The method of claim 1 , wherein, in the depositing of the metal precursor, the metal precursor comprises a platinum (Pt) precursor.

10. The method of claim 1 , further comprising substituting the metal precursor with a metal, after the depositing of the metal precursor.

11. The method of claim 1 , wherein the depositing of the metal precursor is performed using an atomic layer deposition (ALD) method.

12. The method of claim 11 , wherein the ALD method comprises:
supplying the metal precursor to the carbon support;
first purging an inert gas into the reactor;
substituting the metal precursor with a metal by supplying a reaction gas into the reactor; and
second purging the inert gas into the reactor.

13. The method of claim 12 , wherein the supplying of the metal precursor, the first purging, the substituting of the metal precursor and the second purging are sequentially carried out to be set as one cycle, and the cycle is repeated.

14. The method of claim 13 , wherein the cycle is repeated 1 to 20 times.

15. The method of claim 12 , wherein the reaction gas comprises one selected from the group consisting of oxygen (O 2 ), ozone (O 3 ) and a combination thereof.

16. The method of claim 1 , wherein:
the reactor comprises a rotating member; and
the rotating member is driven during the supplying the metal precursor, the first purging, the substituting the metal precursor and the second purging.

17. A metal catalyst composite prepared by a method of claim 1 comprising a carbon support and a metal catalyst deposited on the carbon support.

18. A fuel cell comprising a metal catalyst composite of claim 17 .

19. A vehicle comprising a fuel cell of claim 18 .

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Institute For Research & Industry Cooperation Pusan National Univ

Inventors

• Hong Woong Pyo
• Oh Seung Jeong
• Cha Jin Hyeok
• Kwon Se Hun
• Lee Woo Jae

Classifications

• B01J37/0217 Primary

  Pretreatment of the substrate before coating · CPC title

• B01J37/0238

  via the gaseous phase-sublimation · CPC title

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title

• B01J23/42

  Platinum · CPC title

• H01M4/8803

  Supports for the deposition of the catalytic active composition (H01M4/90 takes precedence) · CPC title