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Article
Cathodic materials for intermediate-temperature solid oxide fuel cells based on praseodymium nickelates-cobaltites
A unique combination of methods (TPD of O2, thermogravimetry, isotopic heteroexchange of oxygen in different modes) was used to carry out detailed studies of oxygen mobility and reactivity in mixed praseodymium n...
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Article
Mechanism of CH4 Dry Reforming on Nanocrystalline Doped Ceria-Zirconia with Supported Pt, Ru, Ni, and Ni–Ru
Specificity of CH4 dry reforming mechanism for Me-supported doped ceria-zirconia catalysts with high oxygen mobility was elucidated using a combination of transient kinetic methods (TAP, SSITKA) with pulse microc...
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Article
Mechanism of oxygen transfer in layered lanthanide nickelates Ln2 − x NiO4 + δ (Ln = La, Pr) and their nanocomposites with Ce0.9Gd0.1O2 − δ and Y2(Ti0.8Zr0.2)1.6Mn0.4O7 − δ solid electrolytes
The mechanism of oxygen transfer in layered nickelates having a Ruddlesden-Popper structure and their nanocomposites with Ce0.9Gd0.1O2 − δ (GDC) and Y2(Ti0.8Zr0.2)1.6Mn0.4O7 − δ (YTZM) solid electrolytes having f...
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Article
Synthesis and properties of nanocomposites with mixed ionic-electronic conductivity on the basis of oxide phases with perovskite and fluorite structures
Nanocomposites consisting of phases with fluorite (doped CeO2) and perovskite (LaMnO3, GdMnO3) structures are synthesized using the method of ester polymeric precursors (the Pechini method) and two sources of rar...
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Article
Effect of oxygen mobility in solid catalyst on transient regimes of catalytic reaction of methane partial oxidation at short contact times
Mathematical modeling of the effect of the oxygen mobility in a solid oxide catalyst on the dynamics of transients of fast catalytic reactions has been carried out. The analysis was based upon the redox mechan...
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Article
Reactivity of La1 − x Sr x FeO3 − y (x = 0–1) Perovskites in Oxidation Reactions
Oxygen species and their reactivity in La1 − x Sr x FeO3 − y perovskites prepared using mechanochemical activation were studied by temperature-programmed reduction (TPR) with hy...
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Article
Selective oxidation of hydrocarbons into synthesis gas at short contact times: Design of monolith catalysts and main process parameters
This review summarizes the main achievements of the Boreskov Institute of Catalysis (Siberian Division, Russian Academy of Sciences) in the development of efficient and stable monolith catalysts for selective ...
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Article
Molecular design and characterization of catalysts for NO x selective reduction by hydrocarbons in the oxygen excess based upon ultramicroporous zirconia pillared clays
Approaches to design of zirconia pillared clays via control of the properties of pillaring species in solutions were elaborated. Structural features of pillars and Pt + Cu active components fixed at these nano...
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Article
Mechanochemical synthesis and reactivity of La1 − x Sr x FeO3 − y perovskites (0 ≤ x ≤ 1)
Mechanochemical synthesis of La1 − x Sr x Fe3 − y (0 ≤ x ≤ 1) perovskites was carried out from simple oxides. Undoped lanthanum ferrite samples calcined at 900 and 1100°C for 4 ...
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Article
Oxygen States in Oxides with a Perovskite Structure and Their Catalytic Activity in Complete Oxidation Reactions: System La1 – x Ca x FeO3 – y (x = 0–1)
Oxygen states in the La1 – x Ca x FeO3 – y perovskites prepared using different procedures are studied by temperature-programmed reduction (TPR). Results are compared to data on...
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Article
Reactivity of surface and bulk oxygen in La1-xCaxFeO3-y system with respect to methane oxidation
The reactivity and mobility of the surface and lattice oxygen in a La1-xCaxFeO3-y system prepared via a ceramic route were studied by using CH4-TPR. While the middle-temperature (400-700oC) oxygen lattice mobilit...
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Article
Mechanochemical synthesis, structure, and properties of nanocrystalline metastable perovskites and fluorites for catalytic membrane reactors
Nanosized powders of conductive complex fluorites based on δ-Bi2O3 and perovskites based on LnMnO3, SrFeO3, LnGaO3 have been obtained by mechanochemical synthesis. Complex do** was used for kinetic stabilizatio...
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Chapter and Conference Paper
Mobility and Reactivity of the Surface and Lattice Oxygen of Some Complex Oxides with Perovskite Structure
Mobility and reactivity of the surface and bulk oxygen of perovskite-like mixed oxides including lanthanum manganite (I) and ferrite (II) systems modified by Ca (I,II) and fluorine (I), as well as some Co, Fe-...
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Article
Design Of New Oxide Ceramic Materials And Nanocomposites With Mixed Conductivity By Using Mechanical Activation Route.
Some perovskite –like Fe (Co) -containing and fluorite-like Bi –containing solid solutions considered as promising materials for high oxygen flux membranes application have been synthesized by the mechanochemi...
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Article
Physicochemical and Catalytic Properties of La1 – xCaxFeO3 – 0.5x Perovskites Prepared Using Mechanochemical Activation
The phase composition of La1 – x Ca x FeO3 – 0.5x perovskites synthesized from preactivated oxides was studied by powder X-ray diffraction analysis and differential dissolution....
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Article
Cu, Co, Ag-Containing Pillared Clays as Catalysts for the Selective Reduction of NOx by Hydrocarbons in an Excess of Oxygen
Thermally stable Al- and Zr-PILC loaded with copper and cobalt cations and silver nanoparticles were synthesized. The structural and surface features of these nanosystems were studied and compared with those o...
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Article
Zirconium-Containing Compositions with a Component Ratio Characteristic of the Garnet Structure: Physicochemical and Catalytic Properties
The possibility for the formation of garnet structures in the Mn–Fe–Zr–O and Ca–Sm–Zr–O systems obtained by the precipitation of the corresponding salts is studied. It is shown that, in the Mn–Fe–Zr–O system, ...
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Article
Physicochemical and catalytic properties of La1-xCax FeO3-0.5x perovskites
The phase analysis of La1-xCaxFeO3-0.5x perovskites prepared by a ceramic process from oxides is studied by X-ray diffraction and differential dissolution methods. Atx < 0.5, the system does not form a continuous...
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Article
Nanocomposites Based Upon Alumina and Zirconia Pillared Clays Loaded with Transition Metal Cations and Clusters of Precious Metals: Synthesis, Properties and Catalysis of NOx Selective Reduction by Hydrocarbons
Thermally stable alumina and zirconia pillared clays loaded with copper and cobalt cations and silver nanoparticles were synthesized. The structural and surface features of these nanosystems were studied and c...
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Article
On the nature of factors determining reactivity of strongly bound surface species as intermediates in heterogeneous catalytic redox reactions
The rate-limiting stage of heterogeneous catalytic redox reactions with participation of strongly bound surface species, such as nitrates, carbonates and sulfites, is the interaction of these heteroatomic oxid...
