Catalytic layer and use thereof in oxygen-permeable membranes

A catalytic activation layer in an oxygen-permeable membrane, wherein the catalytic activation layer comprises at least one porous structure formed by particles of ceramic oxides, said particles linked to each other, conducting oxygen ions and electronic carriers, coated with nanoparticles made of a catalyst which has a composition with the following formula:

• A1-x-yBxCyOR
• wherein
• A is selected from Ti, Zr, Hf, lanthanide metals and combinations thereof;
• B and C are metals selected from Al, Ga, Y, Sc, B, Nb, Ta, V, Mo, W, Re, Mn, Sn, Pr, Sm, Tb, Yb, Lu and combinations thereof;
• A must always be different from B,
• 0.01≤x≤0.5;
• 0≤y≤0.3;
• and
• wherein R represents the molar content of oxygen, which is determined by the molar composition of the remaining metal elements of the composition;
• and wherein said catalytic activation layer has a thickness comprised between 5 and 100 μm, a porosity comprised between 10 and 60% and pores with an average size comprised between 0.1 and 5 μm and a content of supported catalyst on the porous structure between 0.5 and 10% by weight of the porous structure.