PtAu nanoparticle catalyst heat-treated in the presence of CO and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9793552-B2
Application number	US-201414193083-A
Country	US
Kind code	B2
Filing date	Feb 28, 2014
Priority date	Jan 10, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The present disclosure relates to a PtAu nanoparticle catalyst heat-treated in the presence of carbon monoxide (CO) and a method for preparing same. Since the Pt x Au y nanoparticle catalyst heat-treated under CO atmosphere has high Pt surface area and superior oxygen reduction reaction (ORR) activity, a high-efficiency, high-quality fuel cell can be achieved by applying the catalyst to a fuel cell.

First claim

What is claimed is:

1. A method for preparing a PtAu—CO nanoparticle catalyst, the method comprising:
adding carbon black, a Pt salt, a Au salt, and a stabilizer into an anhydrous alcohol to form a dispersion mixture;
adding a reducing agent to the dispersion mixture to prepare a PtAu nanoparticle catalyst;
filtering the dispersion mixture with the added PtAu nanoparticle catalyst;
drying the filtered PtAu nanoparticle catalyst;
heat-treating the dried PtAu nanoparticle catalyst at 400-500 K under air atmosphere; and
further heat-treating the heat-treated PtAu nanoparticle catalyst under carbon monoxide (CO) atmosphere to prepare the PtAu—CO nanoparticle catalyst, wherein the PtAu—CO nomenclature is used to indicate that the PtAu nanoparticle catalyst has undergone heat-treatment under the carbon monoxide (CO) atmosphere wherein the PtAu—CO nanoparticle catalyst has a mass activity of 200-500 mA/mg Pt .

2. The method of claim 1 , wherein the anhydrous alcohol is selected from the group consisting of anhydrous ethanol and anhydrous methanol.

3. The method of claim 1 , wherein the reducing agent is selected from the group consisting of tert-butylamine borane, trimethylamine borane, formic acid, ammonium formate, and dimethylamine borane.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jang Jong Hyun
• Sung Yung-Eun
• Park Hee-Young
• Kim Hyoung-Juhn
• Henkensmeier Dirk
• Nam Suk Woo
• Ham Hyung Chul
• Lim Tae-Hoon
• Yoo Sung Jong
• Cho Eun Ae
• Lee Kug-Seung

Classifications

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title

• H01M4/926 Primary

  on carbon or graphite · CPC title

• Y02E60/50

  Fuel cells · CPC title