Patent · US Expired

Co-tolerant anode catalyst for PEM fuel cells and a process for its preparation

US6007934A · kind A · utility

68Cited by

5References

10Claims

0Family size

Assignee

Degussa AG · DE

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

Key dates

Filing date	May 19, 1998
Grant date	Dec 28, 1999
Priority date	—
Expiry date	May 19, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.