Oxygen Exchange in Pr2NiO4+δ at High Temperature and Direct Formation of Pr4Ni3O10−x

✍ Scribed by P. Odier; Ch. Allançon; J.M. Bassat

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 136 KB
• Volume: 153
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8786

✦ Synopsis

We have studied the stability of Pr 2 NiO 4؉ under pure oxygen 6ow by in situ measurement of its weight versus T. Above 8503C a fast oxidation is observed corresponding to the ex-solution of PrO y species and to the formation of metallic Pr 4 Ni 3 O 10؊x . This reaction is not reversible. The quantity of exchanged oxygen, its fast kinetics, and the metallic behavior of the composite suggest that this material should have interesting applications for electrodes of solid oxide fuel cells.