Porous dendritic platinum tubes as fuel cell electrocatalysts

US8709127B2 · kind B2 · utility

Assignees

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US
• THE UNIVERSITY OF WESTERN ONTARIO · CA

Inventors

• Mei Cai · Bloomfield Hills, US
• Xueliang Sun · London, CA
• Gaixia Zhang · London, CA
• Shuhui Sun · Nanhu, CN
• Ruying Li · London, CA

Key dates

• Filing date: Sep 14, 2011
• Grant date: Apr 29, 2014
• Expiry date: Jun 11, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Platinum particles have been formed as porous, hollow tubular dendrites by using silver dendrite particles in a galvanic replacement reaction conducted in an aqueous solution of a platinum compound. The dendritic platinum particles have been found useful as catalysts and particularly useful as a hydrogen-oxidation electrocatalyst and/or an oxygen-reduction catalyst in a polymer electrolyte membrane fuel cell.