Abstract: The invention relates to a method and to a plant for chemical looping oxidation-reduction combustion (CLC) of a gaseous hydrocarbon feed, for example natural gas essentially containing methane. According to the invention, catalytic steam reforming of the feed is performed between two successive feed combustion steps on contact with an oxidation-reduction active mass in form of particles. The reforming catalyst is arranged in a fixed bed in an intermediate reforming zone (130) between the two reduction zones (120, 140) where the two combustion steps are conducted.

Abstract: A photocathode for a photoelectrolysis device, including: a substrate; a layer of a metal conductor arranged on the substrate; at least one first layer of a first, p-type semiconductor arranged on the layer of metal conductor; at least one second layer of a second p-type semiconductor arranged on the first layer of the first, p-type semiconductor; and at least one third layer of a third, n-type semiconductor forming a protective layer and arranged on the second layer of the second, p-type semiconductor, the third layer of the third, n-type semiconductor being stable in aqueous media to prevent contact between an aqueous electrolyte and the first and second layers of the first and second, p-type semiconductors and including a material of ABO3 material, wherein A is selected from Ca, Sr and Ba and B is selected from Ti, Fe.