Water electrolysis catalyst with core-shell structure and method for preparing same

Patent metadata

Field	Value
Publication number	US-12404594-B2
Application number	US-202318376601-A
Country	US
Kind code	B2
Filing date	Oct 4, 2023
Priority date	Oct 6, 2022
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

Provided is a water electrolysis catalyst with a core-shell structure, which has a vanadium-doped cobalt nitride (V—Co4N) core; and a cobalt-nickel phosphate (CoNiPOx, x is a natural number) shell.

First claim

The invention claimed is:

1. A water electrolysis catalyst with a core-shell structure, having:
a vanadium-doped cobalt nitride (V—Co 4 N) core; and
a cobalt-nickel phosphate (CoNiPO x , x is a natural number) shell,
wherein, in the vanadium-doped cobalt nitride, vanadium is doped at 3 at %.

2. The water electrolysis catalyst with a core-shell structure according to claim 1 , wherein the core has crystalline characteristics and the shell has amorphous characteristics.

3. The water electrolysis catalyst with a core-shell structure according to claim 1 , wherein the water electrolysis catalyst with a core-shell structure has a pore structure.

4. The water electrolysis catalyst with a core-shell structure according to claim 1 , wherein the vanadium-doped cobalt nitride (V—Co 4 N) core is a nanowire that has grown on a nickel foam.

5. The water electrolysis catalyst with a core-shell structure according to claim 4 , wherein the shell is deposited on the nanowire which is the core by an electrodeposition process and, as a result, pore volume and specific surface area are increased.

6. An electrode for water electrolysis comprising the water electrolysis catalyst with a core-shell structure according to claim 5 .

7. A water electrolysis system comprising the electrode for water electrolysis comprising the water electrolysis catalyst according to claim 6 .

8. A method for preparing the water electrolysis catalyst of claim 1 , comprising:
a step of forming a cobalt carbonate hydroxide hydrate nanowire on a support;
a step of doping vanadium in the nanowire and preparing the vanadium-doped cobalt nitride core through nitridation treatment; and
a step of depositing the cobalt-nickel phosphate shell on the vanadium-doped cobalt nitride core.

9. The method for preparing a water electrolysis catalyst with a core-shell structure according to claim 8 , wherein the support is a nickel foam.

10. The method for preparing a water electrolysis catalyst with a core-shell structure according to claim 8 , wherein the vanadium is doped in the nanowire at 3 at %.

11. The method for preparing a water electrolysis catalyst with a core-shell structure according to claim 8 , wherein the deposition is performed by an electrodeposition process and, as a result, pore volume and specific surface area are increased.

Assignees

• Iucf Hyu Erica Campus

Inventors

• Lee Seunghyun
• Singh Thangjam Ibomcha
• Cha Dun Chan
• Kim Sumin

Classifications

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• B01J35/53

  with a core-shell structure · CPC title

• B01J27/24

  Nitrogen compounds · CPC title

• B01J27/1853

  with iron, cobalt or nickel · CPC title

• B01J27/18

  with metals {other than Al or Zr} · CPC title