Catalyst for fuel cell, fuel cell comprising the same and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12456739-B2
Application number	US-202217862644-A
Country	US
Kind code	B2
Filing date	Jul 12, 2022
Priority date	Nov 23, 2021
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

The present disclosure relates to a catalyst for a fuel cell, a fuel cell including the same and a method for preparing the catalyst for a fuel cell. More specifically, the catalyst for a fuel cell according to the present disclosure can exhibit superior catalytic activity as compared to the existing catalyst even when the catalyst metal is used at a very low content because some metal of the metal nanoparticles distributed on a carbon support is replaced with catalyst metal single atoms.

First claim

What is claimed is:

1 . A catalyst for a fuel cell, comprising:
a carbon support; and metal nanoparticles distributed on the carbon support, wherein some metal of the metal nanoparticles is replaced with catalyst metal single atoms, and wherein a molar ratio of the metal nanoparticles and the catalyst metal single atoms is 100:0.3-100:7.5.

2 . The catalyst for a fuel cell according to claim 1 , wherein the catalyst for a fuel cell does not exhibit a peak corresponding to Pt 0 as a result of X-ray photoelectron spectroscopy (XPS) analysis.

3 . The catalyst for a fuel cell according to claim 1 , wherein a height of a region corresponding to the catalyst metal in a line profile analysis result of a scanning transmission electron microscopy (STEM) image is higher than a height of a region corresponding to the metal of the metal nanoparticles.

4 . The catalyst for a fuel cell according to claim 1 , wherein the carbon support is one or more selected from the group consisting of Vulcan, carbon black, graphite carbon, acetylene black, Ketjen black, carbon nanotube, carbon nanowire and carbon nanorod.

5 . The catalyst for a fuel cell according to claim 1 , wherein the metal nanoparticles are one or more selected from the group consisting of ruthenium (Ru), nickel (Ni), cobalt (Co) and iron (Fe).

6 . The catalyst for a fuel cell according to claim 1 , wherein the catalyst metal single atoms are one or more selected from the group consisting of platinum, rhodium, palladium, osmium, ruthenium and iridium.

7 . The catalyst for a fuel cell according to claim 1 , wherein a standard reduction potential of the metal nanoparticles is lower than a standard reduction potential of the catalyst metal single atoms.

8 . The catalyst for a fuel cell according to claim 1 , wherein the metal nanoparticles have a diameter of 2-10 nm.

9 . The catalyst for a fuel cell according to claim 1 , wherein the catalyst metal single atoms are comprised in an amount of 0.5-3 wt % based on 100 wt % of the catalyst for a fuel cell.

10 . The catalyst for a fuel cell according to claim 1 , wherein the catalyst for a fuel cell does not exhibit a peak corresponding to the catalyst metal as a result of X-ray diffraction (XRD).

Assignees

• Korea Inst Sci & Tech

Inventors

• Yoo Sung Jong
• Lee Dong Wook
• Seo Bora
• Lee So Young
• Park Hee-Young
• Park Hyun Seo
• Kim Jin Young
• Kim Hyoung-Juhn
• Jang Jong Hyun
• Choi Daeil

Classifications

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M4/8657

  layered · CPC title

• H01M4/926 Primary

  on carbon or graphite · CPC title

• H01M4/90

  Selection of catalytic material · CPC title

• H01M4/88

  Processes of manufacture · CPC title