The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1999
Filed:
Aug. 15, 1997
Elise Marucchi-Soos, Warren, NJ (US);
John Lawrence Robbins, Stockton, NJ (US);
Richard James Bellows, Hampton, NJ (US);
David Terence Buckley, Somerville, NJ (US);
Exxon Research and Engineering Co., Florham Park, NJ (US);
Abstract
The invention is a composition, comprising: a carbon-supported, dispersed platinum-zinc alloy having the formula Pt-Zn.sub.x /C wherein x ranges from greater than 0.05 to less than 1 wherein platinum is in the form of platinum particles ranging in size from about 20 .ANG. to about 30 .ANG. on a carbon support, wherein the carbon is in the form of high surface area carbon having surface area ranging from about 100 to about 500 m.sup.2 /g, and the platinum particles are present in an amount ranging from about 10 to about 40 wt % on the carbon support. The composition is made by the process of depositing on the carbon support a soluble zinc source selected from the group of zinc nitrate, acetate, halides, formates, oxalates, and acetyl acetonates and mixtures thereof; calcining to convert the zinc source to ZnO; and then reducing the zinc oxide at a temperature ranging from about 250.degree. C. to about 600.degree. C., in the presence of hydrogen at a pressure ranging from about 1 atmosphere (100 KPa) to about 10 atmospheres(1000 KPa). or by the process of admixing zinc powder with Pt/C powder; and heating the mixture under a reducing atmosphere at a temperature sufficient to produce the Pt-Zn.sub.x /C alloy, wherein x ranges from greater than 0.05 to less than 1. The invention has utility in fuel cells in electrochemical processes requiring CO tolerant anodes.