# US 9,040,210 B2 · Stable, durable carbon supported catalyst composition for fuel cell

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- Number: US 9,040,210 B2
- Document ID: US9040210B2
- Status: Granted
- Kind: B2
- Application number: 13/711,786
- Filed: 2012-12-12
- Published: 2013-06-27
- Granted: 2015-05-26
- Earliest claimed: 2011-12-23
- Assignees: Daimler AG; Ford Motor Company
- Applicants: Daimler AG; Ford Motor Company
- Inventors: Natalia Kremliakova
- Web page: https://patentgrep.com/patent/US9040210B2

## CPC

- H01M 4/921: {Alloys or mixtures with metallic elements}
- H01M 4/8825: {Methods for deposition of the catalytic active composition}
- H01M 4/925: {supported on carriers, e.g. powder carriers}
- H01M 4/926: {on carbon or graphite}
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A carbon supported catalyst composition for solid polymer electrolyte fuel cells is disclosed that shows a high mass activity and favorable stability and durability. The catalyst composition comprises an intermetallic phase or alloy comprising Pt and a metal selected from the group consisting of Nb, Ta, V and Mo, and comprises an oxide of the metal. The carbon supported catalyst composition can be prepared at relatively low temperature either by first depositing and heating an oxide precursor of the metal on a suitable carbon to make a hybrid support, and then depositing and heating a Pt precursor on the hybrid support, or by depositing both an oxide precursor of the metal and a Pt precursor on a suitable carbon support, and directly heating to a final temperature.

## Claims

### Claim 1

A carbon supported catalyst composition comprising a catalyst composition finely dispersed on a carbon containing support wherein the catalyst composition comprises PtCoNb alloy and Nb2O5.

### Claim 2 (depends on 1)

The carbon supported catalyst composition of claim 1 wherein the carbon in the carbon containing support is a carbon black, acetylene black, activated charcoal, synthetic graphite, or natural graphite.

### Claim 3 (depends on 1)

An electrode for a fuel cell comprising the carbon supported catalyst composition of claim 1.

### Claim 4 (depends on 1)

A fuel cell comprising the carbon supported catalyst composition of claim 1.