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:
Dec. 28, 1999
Filed:
May. 19, 1998
Applicant:
Inventors:
Emmanuel Auer, Frankfurt, DE;
Andreas Freund, Kleinostheim, DE;
Thomas Lehmann, Langenselbold, DE;
Karl-Anton Starz, Rodenbach, DE;
Robert Schwarz, Rodenbach, DE;
Udo Stenke, Mainaschaff, DE;
Assignee:
Degussa Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 44 ; 429 40 ; 429 41 ; 429 42 ; 429 30 ; 429 33 ; 204282 ; 204283 ; 2042 / ; 502101 ;
Abstract
A platinum supported catalyst is disclosed for the anode in a PEM fuel cell with high resistance to poisoning by carbon monoxide. The catalyst contains the noble metals platinum and ruthenium on a finely divided, conductive support material. The two noble metals are not alloyed with each other and are present in highly dispersed form on the support material, wherein the crystallite size of the platinum is less than 2 nm and that of the ruthenium is less than 1 nm.