Title: Fuel cell cathode catalyst

Abstract

A fuel cell cathode catalyst is provided which comprises nanostructured elements comprising microstructured support whiskers bearing nanoscopic catalyst particles. The nanoscopic catalyst particles are made by the alternating application of first and second layers, the first layer comprising platinum and the second layer being an alloy or intimate mixture of iron and a second metal selected from the group consisting of Group VIb metals, Group VIIb metals and Group VIIIb metals other than platinum and iron, where the atomic ratio of iron to the second metal in the second layer is between 0 and 10, where the planar equivalent thickness ratio of the first layer to the second layer is between 0.3 and 5, and wherein the average bilayer planar equivalent thickness of the first and second layers is less than 100 Å.

Inventors:

Vernstrom, George D.; Atanasoski, Radoslav; Debe, Mark K.; Haugen, Gregory M.; Lewinski, Krzysztof A.; Steinbach, Andrew J. L.

Issue Date:

Tue Sep 02 00:00:00 EDT 2008

Research Org.:

3M Innovative Properties Company

Sponsoring Org.:

USDOE

OSTI Identifier:

1531563

Patent Number(s):

7419741

Application Number:

10/674,594

Assignee:

3M Innovative Properties Company (Saint Paul, MN)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J35/026 - {Form of the solid particles

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M4/8605 - {Porous electrodes}
H01M4/8803 - {Supports for the deposition of the catalytic active composition
H01M4/8871 - {Sputtering}
H01M4/921 - {Alloys or mixtures with metallic elements}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/50 - Fuel cells

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DOE Contract Number:  

FC02-99EE50582

Resource Type:

Patent

Resource Relation:

Patent File Date: 2003-09-29

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE