Method for manufacturing catalyst for fuel cell using blood of slaughtered livestock

Patent metadata

Field	Value
Publication number	US-11522200-B2
Application number	US-201916710336-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Jun 28, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The present disclosure is a method for manufacturing a catalyst for a fuel cell using the blood of slaughtered livestock. The method for manufacturing a catalyst for a fuel cell using the blood of slaughtered livestock of the present disclosure allows preparation of a catalyst for a fuel cell exhibiting high redox reaction activity and very superior durability as compared to a commercially available platinum catalyst through a very simple process of purification of the blood of slaughtered livestock and hydrothermal synthesis. In addition, the method is very economical in that a catalyst is prepared using the pure blood of livestock only without an artificial additive, waste disposal cost can be reduced by recycling the blood of livestock and a high-performance catalyst capable of replacing the expensive platinum catalyst can be prepared.

First claim

What is claimed is:

1. A method for manufacturing a catalyst for a fuel cell using the blood of slaughtered livestock, comprising:
i) separating red blood cells from the blood of slaughtered livestock;
ii) extracting hemoglobin from the separated red blood cells by mixing with an organic solvent;
iii) preparing an iron nitride-carbon composite by conducting hydrothermal synthesis on the extracted hemoglobin; and
iv) activating the iron nitride-carbon composite by conducting heat treatment thereby producing the catalyst.

2. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein the organic solvent is one or more selected from toluene, xylene, EDTA, ether, chloroform and cyclohexane.

3. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein the separated red blood cells, distilled water, and the organic solvent are mixed at a volume ratio of 1:0.1-2:0.1-1.

4. The method for manufacturing a catalyst for a fuel cell livestock according to claim 1 , wherein the hydrothermal synthesis at step iii is conducted in an autoclave at 120-250° C. for 6-36 hours.

5. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein the hydrothermal synthesis on the extracted hemoglobin is conducted by diluting the extracted hemoglobin in distilled water to a concentration of 10-99 vol %.

6. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein the heat treatment is conducted under an atmosphere of one or more gases selected from hydrogen, ammonia, argon and nitrogen.

7. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein the heat treatment is conducted at 300-1000° C.

8. The method for manufacturing a catalyst for a fuel cell according to claim 1 , wherein
the organic solvent is toluene, further wherein the separated red blood cells, distilled water, and the toluene are mixed at a volume ratio of 1:0.8-1.2:0.3-0.5,
the extracted hemoglobin at step ii) is diluted in distilled water to a concentration of 10-20 vol %, and the hydrothermal synthesis is conducted in an autoclave at 180-220° C. for 18-30 hours, and
the heat treatment is conducted at 800-1000° C. under a nitrogen atmosphere.

Assignees

• Korea Inst Sci & Tech

Inventors

• Yoo Sung Jong
• Park Hee-Young
• Lee So Young
• Park Hyun Seo
• Kim Jin Young
• Jang Jong Hyun
• Kim Hyoung-Juhn
• Kim Pil
• Sohn Yeonsun
• Lee Jiho

Classifications

• H01M4/96

  Carbon-based electrodes · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M4/8652 Primary

  as mixture · CPC title

• H01M4/90

  Selection of catalytic material · CPC title

• H01M4/9083

  on carbon or graphite · CPC title