Improved Pt alloy catalysts for fuel cells

✍ Scribed by Andreas Freund; Jutta Lang; Thomas Lehmann; Karl Anton Starz

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 295 KB
• Volume: 27
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/0920-5861(95)00210-3

✦ Synopsis

Supported Pt-Co-Cr alloy catalysts on graphitized carbon black showing increased activity and stability as electrode catalysts for oxygen-reduction reaction in phosphoric acid fuel cells have been developed by co-precipitation of the corresponding metal nitrates. XRD investigations showed that a tetragonal ordered structure was formed upon thermal treatment. The formation of this structure required temperatures above 873 K. Although two-step and other sequential methods are known for the preparation of such catalysts, the newly developed method described here will led more efficiently to catalysts, having a small particle size, of the platinum cobalt chromium alloy.