CATALYTIC LAYER FOR OXYGEN ACTIVATION ON IONIC SOLID ELECTROLYTES AT HIGH TEMPERATURE

摘要

The present invention relates to a catalytic porous layer for oxygen activation which may be utilised in solid oxide fuel cells (SOFCs) and in dense ceramic membranes for oxygen separation at high temperature. Said porous layer is principally formed by a mixed electron and oxygen ion conductive material possessing a structure selected from among structures of the simple perovskite or double perovskite type or structures related to perovskite, that is to say: structures of the Ruddlesden-Popper, Dion-Jacobson and Aurivillius type. The composition of such crystalline phase has the following general formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[(BaaA'bA"cA"'1-a-b-c)1-xBx]N [Fe1-y-zCyDz]M OW.