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Article
Activation of hydrocarbons in the oxidative dimerization of methane over alkaline earth metals
Oxidative dimerization of methane over alkaline earth metal oxides and phosphates has been studied. The ratedetermining step is heterolytic C−H bond dissociation of methane on surface basic sites of the cataly...
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Article
Influence of CO2 and H2O on methane conversion over oxide catalysts
It has been established that the introduction of CO2 and H2O to the reaction mixture when using freshly prepared catalysts, increases the overall methane conversion and decreases the yield of hydrocarbons. On cok...
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Article
High temperature catalytic synthesis of higher hydrocarbons from methane
It has been revealed that methane conversion to higher hydrocarbons over MgO catalyst involves the direct participation of heterogeneous catalyst at contact times of up to τ∼3s and is a homogeneous reaction at...
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Article
Kinetic regularities for the interaction of anion-radicals O 2 − with benzene and toluene on Mo−Mg oxide systems
Interaction of anion-radicals O 2 − with adsorbed forms of benzene and toluene at 293–473 K is shown to be described by an equation corresponding to exponentia...
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Article
Reaction mechanism and principles of choosing catalysts for selective oxidation at C−H bonds
Reaction mechanism for selective oxidation of organic compounds at C−H bonds is discussed. The criteria of selecting catalysts for these reactions have been formulated; 1) fast heterolytic activation of C−H bo...
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Article
Electrocatalytic hydroxylation of aniline on metal oxides
Studies of Mn, Cr, Cu, La, Sb, V, Co and W oxides as catalysts for the electrocatalytic oxidation of aniline to p-aminophenol have revealed the electrocatalytic activity of WO3. A mathematical model for the kinet...
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Article
Oxidative conversion of butane and pentane on superacid catalysts
Catalytic properties of AlBr3, AlBr3−CuCl2 and AlBr3−NiSO4 in liquid-phase conversion of butane and pentane have been examined. A possibility for the oxidative condensation has been revealed due to both the stoic...
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Article
Silica-immobilized binuclear chromium-molybdenum complexes
ESR and UV spectra of a binuclear complex [n-(C4H9)4N]3 CrMoOCl9 in solution and supported on SiO2 have been studied. Upon fixing this complex followed by oxidation-reduction treatment, a highly disperse state is...
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Article
Reaction product distribution in allylic oxidation of propylene on a zinc-stibium oxide catalyst
Physico-chemical (ESR, X-ray photoelectron spectroscopy and phase analysis) and catalytic properties of a Zn−Sb−O catalyst have been studied. The distribution of the products of allylic oxidation was shown to ...
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Article
A new approach to stabilization of enzymes immobilized on inorganic supports. “Embedded” enzymes
A new approach to the stabilization of enzymes on inorganic supports consisting in the “embedment” of immobilized enzymes in the support pores, is suggested. Exemplified by alcohol dehydrogenase, the “embedmen...
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Article
Electrocatalytic hydroxylation of aniline
Electrocatalytic oxidation of aniline to p-aminophenol by electrochemically activated molecular oxygen via the direct transfer of electrons from the cathode to a catalyst active center is enhanced in the prese...
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Article
Donor-acceptor concept in nucleophilic and general base catalysis by imidazole
In terms of the donor-acceptor concept as applied to the reactions of nucleophilic and general base catalysis, a relation between the properties of reagents and catalyst and the possibility for the predominant...
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Article
Propylene oxidation on supported molybdenum complexes of different nuclearity
Studies of the catalytic properties of supported mono-, bi- and polynuclear molybdenum complesex in propylene oxidation indicate that the most coordinatively saturated polynuclear complexes with the maximum br...
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Article
Donor-acceptor concept of covalent interaction of substrate with catalysts
In terms of a unitary approach, the ability of complexes, clusters and metals of transition and nontransition elements for covalent interaction with reagents has been analyzed. the requirements for the catalys...
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Article
Catalytic properties and phase composition of multicomponent catalysts for oxidative ammonolysis of propane
Studies of the phase composition and catalytic properties of several complex oxide catalysts for oxidative ammonolysis of propane indicate that the active phases of these catalysts are antimonates of the respe...
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Article
Basicity and catalytic properties of multicomponent catalysts for oxidative ammonolysis of propane
Studies of the effect of phosphorus and tungsten on the basicity and catalytic properties of catalysts for oxidative ammonolysis of propane indicate that, besides the common decrease in the number of active ce...
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Article
Oxidative elongation of lower paraffins
It is shown that the oxidative condensation of ethane on CoMo/γ-Al2O3 catalysts is in principle possible. The conceivable paths of this reaction are analyzed.
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Article
Character of hydrocarbon activation and catalytic activity of solid catalysts in deep oxidation reactions
In terms of a single conception, the relative reactivity of hydrocarbons and the activity of solid catalysts in reactions of deep oxidation are interpreted for the ITi type mechanism. It is shown that for the oxi...
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Article
Reactivity of oxidized substances and its correlation with catalyst properties in deep oxidation reactions
In terms of the donor-acceptor interaction concept /1/ the relative reactivity (RR) of organic and inorganic compounds and its correlation with catalyst properties in deep oxidation reactions are treated. RR a...
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Article
Monooxygenase activity of immobilized iron(III) porphyrins
New silica-immobilized iron(III) porphyrin systems possessing monooxygenase activity in aniline oxidation to p-aminophenol, have been found. The catalytic activity depends on both the porphyrin structure and c...
