Реферат: Here our results of design, characterization and testing nanocomposite materials for oxygen and hydrogen separation membranes, solid oxide fuel cells and structured catalysts for natural gas and biofuels transformation into syngas are presented. These materials are comprised of mixed ionic-electronic conducting complex oxides nanoparticles (with perovskite, spinel, fluorite and Ruddlesden-Popper type structures), ionic conductors (doped ceria, zirconia etc. as oxide-ion conductors; tungstates, molybdates and scandates of lanthanoids etc. as protonic conductors), electronic conductors (nanoparticles of Ni-based alloys, etc.) and their nanocomposites prepared and sintered by variety of methods including e-beam sintering using an ILU-6 accelerator. Metal substrates for structured catalysts were covered by protective La2Zr2O7 - LaAlO3 layers sintered by e-beam. Ni+Ru/ Pr0.15Sm0.15Ce0.35Zr0.35O2 catalytic layer was supported on these substrates from suspension, and after drying was also sintered by e-beam. The real/atomic structure of nanomaterials was characterized by combination of modern structural and spectral methods, while oxygen/hydrogen mobility and surface reactivity were studied by isotope heteroexchange in the temperature- programmed mode. Co-existence of several channels of oxygen migration in these systems with diffusion coefficients differing by several orders of magnitude was demonstrated with fast channels corresponding to interfaces in nanocomposites, grain boundaries in complex oxides enriched by some cations as well as to cooperative mechanism of oxygen migration in oxides with asymmetric structures. Materials optimized by the chemical composition, nanodomain structure and sintering conditions demonstrated a high and stable performance as SOFC cathodes, asymmetric oxygen and hydrogen separation membranes supported on foam substrates used for transformation of biofuels into syngas and hydrogen with a high oxygen/hydrogen fluxes. Catalytic layers demonstrated a good compatibility with the protective layer, which provided a high catalytic activity in fuels reforming and stability to coking. Support by the Russian Science Foundation grant 23-73-00045 is gratefully acknowledged.

Библиографическая ссылка: Sadykov V.A. , Bespalko Y.N. , Eremeev N.F. , Sadovskaya E.M. , Mikhailenko M.A. , Bryazgin A.A. , Korobeynikov M.V.
Materials for Hydrogen Energy: Design, Characterization and Application
Webinar on Material Science & Nano Technology 13-14 May 2024