Dry reforming catalyst, method for preparing same, and dry reforming method using corresponding catalyst

Patent metadata

Field	Value
Publication number	US-10411266-B2
Application number	US-201515542321-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Jan 7, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

Provided are: a dry reforming catalyst, in which a noble metal (M) is doped in a nickel yttria stabilized zirconia complex (Ni/YSZ) and an alloy (M-Ni alloy) of the noble metal (M) and nickel is formed at Ni sites on a surface of the nickel yttria stabilized zircona (YSZ); a method for producing the dry reforming catalyst using the noble metal/glucose; and a method for performing dry reforming using the catalyst. The present invention can exhibit a significantly higher dry reforming activity as compared with Ni/YSZ catalysts. Furthermore, the present invention can have an improved long-term performance by suppressing or preventing the deterioration. Furthermore, the preparing method is useful in performing the alloying of noble metal with Ni at Ni sites on the Ni/YSZ surface and can simplify the preparing process, and thus is suitable in mass production.

First claim

What is claimed is:

1. A dry reforming catalyst, wherein the dry reforming catalyst comprises a noble metal (M) that is doped to a nickel yttria stabilized zirconia complex (Ni/YSZ) and an alloy (M-Ni alloy) of the noble metal (M) and nickel is formed at Ni sites on a surface of the nickel yttria stabilized zircona (YSZ).

2. The dry reforming catalyst according to claim 1 , wherein the noble metal (M) is Pd, Pt, Ru, Rh, Au, or Ag.

3. The dry reforming catalyst according to claim 1 , wherein the noble metal (M) is Pd.

4. The dry reforming catalyst according to claim 1 , wherein an electrical structure of Ni is changed by the alloying of noble metal with Ni at the Ni sites.

5. The dry reforming catalyst according to claim 1 , wherein during the alloying of noble metal with Ni at the Ni sites, a charge transfer occurs from the noble metal particles to the Ni side.

6. The dry reforming catalyst according to claim 1 , wherein the alloying of noble metal with Ni at the Ni sites changes an oxidation state of nickel into a reduced state.

7. The dry reforming catalyst according to claim 1 , wherein the alloying of noble metal with Ni at the Ni sites increases resistance to oxidation of nickel.

8. The dry reforming catalyst according to claim 1 , wherein the alloying of noble metal with Ni at the Ni sites suppresses carbon growth or carbon deposit formation.

9. The dry reforming catalyst according to claim 1 , wherein the alloyed noble metal-nickel alloy (M-Ni alloy) at the Ni sites promotes both CH 4 cracking and CO 2 mediated carbon oxidation.

10. The dry reforming catalyst according to claim 1 , wherein the alloyed noble metal-nickel alloy (M-Ni alloy) at the Ni sites promotes the oxidation of cracked carbon and promotes methane activation.

11. The dry reforming catalyst according to claim 1 , wherein the catalyst is used for dry reforming at a temperature of 750° C. or more.

12. The dry reforming catalyst according to claim 1 , wherein the catalyst is used for dry reforming at a temperature of 800° C. or more.

13. The dry reforming catalyst according to claim 1 , wherein the catalyst is used for dry reforming at a temperature of 750° C. to 900° C. or 800° C. to 900° C.

14. The dry reforming catalyst according to claim 1 , wherein the catalyst is a dry reforming catalyst for improving dry reforming performance and long-term stability of a nickel yttria stabilized zirconia (Ni/YSZ).

15. The dry reforming catalyst according to claim 1 , wherein the catalyst maintains an initial activity after being operated for 120 hours or more.

16. The dry reforming catalyst according to claim 1 , wherein the catalyst is a dry reforming catalyst of a solid oxide fuel cell.

17. A solid oxide fuel cell comprising the dry reforming catalyst according to claim 1 .

18. The solid oxide fuel cell according to claim 17 , wherein the catalyst is a fuel electrode catalyst of the solid oxide fuel cell.

Assignees

• Korea Inst Sci & Tech

Inventors

• Nam Suk Woo
• Yoon Chang Won
• Kim Yeong Cheon
• Kim Yong Min
• Han Jonghee
• Yoon Sung Pil
• Ham Hyung Chul
• Jeong Jihoon
• Koh Seok-Keun

Classifications

• H01M2004/8684

  Negative electrodes · CPC title

• H01M8/0637

  Direct internal reforming at the anode of the fuel cell · CPC title

• H01M4/9058 Primary

  of noble metals or noble-metal based alloys · CPC title

• H01M4/905

  specially used in fuel cell operating at high temperature, e.g. SOFC · CPC title

• H01M4/8647

  consisting of more than one material, e.g. consisting of composites · CPC title