Fuel cell electrocatalyst of Pt-Mn-Co

• US 7,635,533 B2
• Filed: 02/27/2003
• Issued: 12/22/2009
• Est. Priority Date: 02/27/2002
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company), Freeslate Inc. (Unchained Labs Inc.)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company), Symyx Solutions, Inc.
• Inventors: Fukuda, Hiroichi, Oyanagi, Hiroyuki, Devenney, Martin, Gorer, Alexander, He, Ting, Iwasaki, Kazuhiko, Strasser, Peter, Giaquinta, Daniel M., Urata, Kenta, Fan, Qun, Chondroudis, Konstantinos
• Primary Examiner(s): Weiner; Laura S
• Application Number:
  US10/505,625
• Publication Number:
  US 20050106449A1
• Time in Patent Office: 2,490 Days
• Field of Search: 429/40, 502/325, 502/324, 502/339, 502/300
• US Class Current: 429/524
• CPC Class Codes: B01J 2219/00745 Inorganic compounds
• CPC Class Codes: B01J 2219/00747 Catalysts
• CPC Class Codes: B01J 2219/00752 Alloys
• CPC Class Codes: B01J 23/8986 with manganese, technetium or rhenium
• CPC Class Codes: C40B 30/08 by measuring catalytic activity
• CPC Class Codes: C40B 40/18 Libraries containing only inorganic compounds or inorganic materials
• CPC Class Codes: H01M 4/8605 Porous electrodes
• CPC Class Codes: H01M 4/921 Alloys or mixtures with metallic elements
• CPC Class Codes: H01M 8/0625 in a modular combined reactor/fuel cell structure
• CPC Class Codes: H01M 8/1004 characterised by membrane-electrode assemblies [MEA] H01M8/12 takes precedence
• CPC Class Codes: H01M 8/1009 with one of the reactants being liquid, solid or liquid-charged H01M8/12 takes precedence
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

An improved metal alloy composition for a fuel cell catalyst containing platinum, manganese, and cobalt.

Claims

1. A ternary catalyst for use in oxidation or reduction reactions, the ternary catalyst comprising platinum, manganese, and cobalt, wherein the concentration of cobalt is at least 36 atomic percent and less than 70 atomic percent, and the concentration of manganese is at least 5 atomic percent and no greater than 20 atomic percent.

2. The ternary catalyst of claim 1 wherein the total concentration of platinum, cobalt, and manganese is greater than about 95 atomic percent of the catalyst.

3. The ternary catalyst of claim 1 wherein the catalyst consists essentially of platinum, cobalt, and manganese and the total concentration of platinum, cobalt, and manganese is greater than about 99 atomic percent of the catalyst.

4. The ternary catalyst of claim 1 wherein the manganese concentration is between 8 atomic percent and 12 atomic percent.

5. The ternary catalyst of claim 1 wherein the concentration of manganese is between about 5 and 15 atomic percent.

6. The ternary catalyst of claim 1 wherein the concentration of cobalt is between at least 36 atomic percent and said 50 atomic percent.

7. The ternary catalyst of claim 1 wherein the concentration of cobalt is between at least 36 atomic percent and said 50 atomic percent and the total concentration of the platinum, manganese, and cobalt is at least 99 atomic percent.

8. The ternary catalyst of claim 1 wherein the concentration of platinum is between about 30 and about 50 atomic percent.

9. The ternary catalyst of claim 1 wherein the concentration of platinum is between about 45 and about 55 atomic percent and the concentration of manganese is between about 12 and 18 atomic percent.

10. The ternary catalyst of claim 1 wherein the ternary catalyst is an alloy.