The oxygen-conducting membrane consists of La_1.8Sr_0.2NiO₄ gas-tight layer (100 mkm). The conditions of formation of the layer have been studied in order to optimize its micro-structure for effective oxygen transport. La_1.8Sr_0.2NiO₄ membranes were found to be promising materials for syn-gas (CO+H₂) generators. High effectiveness of conversion of hydrocarbons into syn-gas in TPO and TPSC processes is reached by covering the La_1.8Sr_0.2NiO₄ gas-tight layer with catalytically active Ce–Sm–O/Ru(Pt) or Ce–Zr–La–O/Ru(Pt) oxide nanocomposites. The catalytically active compounds were prepared by sol-gel approach using inorganic precursors. They were fabricated by repeated deposition of the corresponding co-precipitated metal hydroxides onto the membrane, and annealed at 600°C. It was found that the presence of La_1.8Sr_0.2NiO₄//Ce–Zr–La–O/Ru hetero-junction increases H₂ yield and enhances the selectivity of TPSC process (1% of CH₄ + 1% of H₂O, He). The deposition of the thin porous catalytic layers leads to the reduction of possible surface inhibition of oxygen diffusion.

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