14 Result(s)
within
Yu. P. Tulenin
English
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Article
Cobalt Nanowires as a Catalyst for Ethylene Hydrogenation
In this work, we demonstrate the effect of increasing the catalytic activity of the surface of cobalt in the ethylene hydrogenation reaction. The way to increase the activity of the surface is to increase its ...
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Article
Variation of the Catalytic Activity and Selectivity of Cobalt in Ethylene Oxidation during Stepwise Oxidation of the Cobalt Surface
The dependence of the catalytic activity of Co foil in ethylene oxidation on the degree of oxidation of the Co surface during stepwise oxidation of foil has been studied. The experiments were performed at 500–...
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Article
Catalytic Properties and Structure of Palladium Surface Layer Formed in the Course of a Self-Oscillatory Reaction of Methane Oxidation
The self-oscillatory mode of methane oxidation over Pd foil at temperature of 400°C for 1 h caused the formation of a surface layer containing bulky porous agglomerates of nanocrystals. According to SEM data, ...
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Article
Copper Nanowires as Catalysts for CO Oxidation
It is shown that copper films with copper nanowires located on them demonstrate enhancement of the catalytic effect during copper-oxide oxidation. Nanowires of different types (cylindrical and conical ones and...
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Article
Catalytic and Structural Properties of Cobalt Surface Layers Formed in the Course of Self-Oscillatory Reactions
Self-oscillatory reactions of ethane oxidation (I) or CO oxidation (II) over Co foil at a temperature of 620 or 660°C, respectively, for 1 h caused the formation of a microporous surface layer composed of CoO ...
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Article
Investigation of Nickel Surface Layers Formed in the Course of Self-Oscillatory Methane Oxidation
Self-oscillatory methane oxidation over Ni foil at 750°C for 1 h resulted in the formation of a porous layer with a depth of 10–12 μm. The layer depth did not increase as the self-oscillatory reaction time was...
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Article
Effect of the Oxidation Degree of a Nickel Foil Surface on Its Catalytic Activity in the Reaction of Ethylene Oxidation
The effect of the oxidation degree of a nickel foil surface on the rate of catalytic oxidation of ethylene was studied by a pulse method at 600 and 700°C. It was shown that a reduced metallic surface demonstra...
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Article
Study of self-oscillations during CO oxidation over Cu foil
The oscillatory behavior during CO oxidation over Cu foil has been observed in the temperature range of 350–750 °C. The oscillatory behavior occurred in CO excess similar to the well-known oscillations during ...
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Article
Self-oscillations and surface waves during CO oxidation over Co
The paper looks into the temporal and spatial dynamics of a new oscillating system comprised of CO oxidation over Co. Reaction rate oscillations occurring in CO excess were similar to the ones observed over Ni...
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Article
Self-Oscillations During Ethylene Oxidation Over a Ni foil
Oscillatory behavior during ethylene oxidation over a Ni foil has been discovered in the temperature range of 600–800 °C. The oscillatory behavior occurred in C2H4 excess in contrast to the well-known oscillation...
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Article
Comparison of Rate Oscillations in Reactions of CO and Methane Oxidation on a Nickel Catalyst
Self-oscillations of the rate of oxidation reactions of CO and CH4 on nickel foil are compared. It has been shown that, despite significant differences in the stepwise mechanism of the two reactions, the properti...
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Article
New Oscillating System: Co Oxidation over Ni
For the first time, the oscillatory behavior during CO oxidation over Ni foil has been discovered under atmospheric pressure conditions in the temperature range of 570–630 °C. The oscillatory behavior occurred...
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Article
The Study of Self-Oscillations During CH4 Oxidation Over Ni by the Pulse Method: Is it Possible?
For the first time, the pulse method has been applied to the study of the self-oscillatory behaviour. For methane oxidation over Ni foil the response to a sequence of equal pulses has been strictly periodic. T...
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Article
Self-Sustained Oscillations as a Method to Increase an Active Surface and Catalytic Activity of Ni and Pd
The effect of Ni and Pd surface development during catalytic self-oscillatory oxidation of C1–C4 alkanes on the activity of these two metals in other catalytic reactions was studied. Scanning electron microscopy ...
