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

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/mgPt.