Title: Electrocatalyst for oxygen reduction with reduced platinum oxidation and dissolution rates

Abstract

The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen.

Inventors:

Adzic, Radoslav ^[1]; Zhang, Junliang ^[2]; Vukmirovic, Miomir ^[3]

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+ Show Inventor Affiliations

1. East Setauket, NY
2. Stony Brook, NY
3. Port Jefferson Station, NY

Issue Date:

Tue Nov 22 00:00:00 EST 2011

Research Org.:

Brookhaven Science Associates, LLC (Upton, NY)

Sponsoring Org.:

USDOE

OSTI Identifier:

1032966

Patent Number(s):

8062552

Application Number:

11/132,378

Assignee:

Brookhaven Science Associates, LLC (Upton, NY)

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 H01B - CABLES

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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

B01J23/42 - Platinum
B01J23/56 - Platinum group metals
B01J37/0221 - {of particles}
B01J37/0238 - {via the gaseous phase-sublimation}
B01J37/16 - Reducing

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01B - CABLES

H01B1/122 - {Ionic conductors}

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

H01M2004/8689 - {Positive electrodes}
H01M2008/1095 - {Fuel cells with polymeric electrolytes}
H01M4/8652 - {as mixture}
H01M4/8657 - {layered}
H01M4/9016 - {Oxides, hydroxides or oxygenated metallic salts}
H01M4/92 - Metals of platinum group
H01M4/925 - {supported on carriers, e.g. powder carriers}
H01M8/1007 - with both reactants being gaseous or vaporised

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

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/12771 - Transition metal-base component
Y10T428/24997 - Of metal-containing material

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DOE Contract Number:  

AC02-98CH10886

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE