NDLI: Effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage of the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on its phase composition and catalytic activity in CO oxidation

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Effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage of the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on its phase composition and catalytic activity in CO oxidation

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Effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage of the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on its phase composition and catalytic activity in CO oxidation

Content Provider	Springer Nature Link
Author	Afonasenko, T. N. Bulavchenko, O. A. Knyazheva, O. A. Baklava, O. N. Gulyaeva, T. I. Trenikhin, M. V. Tsybulya, S. V. Tsyrul’nikov, P. G.
Copyright Year	2015
Abstract	The effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage in the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on the characteristics of the resulting samples was studied. It was found that the catalytic activity of MnO$_{ x }$-Al$_{2}$O$_{3}$ increased even after mechanical activation for 5 min. It was established that a decrease in the concentration of manganese hydroxocarbonate within the limits of the tested ratios between the components exerted the greatest positive effect of mechanical activation on catalytic activity. This was likely because the dispersion of this compound increased and interactions between the components strengthened in the course of mechanical activation. This was evidenced by a considerable increase in the amount of the α-Al$_{2}$O$_{3}$ phase relative to δ-Al$_{2}$O$_{3}$ in the catalyst calcined at 950°C. According to the results of temperature-programmed reduction with hydrogen, the formation of a larger number of catalytically active, fine MnO$_{ x }$ particles after high-temperature heat treatment was responsible for the strengthening of interactions between the initial components upon mechanical activation. Transmission electron-microscopic data also indicated an increase in the dispersity of manganese oxide particles with the use of mechanical activation as a stage of the preparation of the MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst.
Starting Page	359
Ending Page	368
Page Count	10
File Format	PDF
ISSN	00231584
Journal	Kinetics and Catalysis
Volume Number	56
Issue Number	3
e-ISSN	16083210
Language	English
Publisher	Pleiades Publishing
Publisher Date	2015-06-17
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Catalysis Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis Modeling and Simulation Computer Science Applications

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Effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage of the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on its phase composition and catalytic activity in CO oxidation

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Effect of the mechanical activation of a mixture of MnCO$_{3}$ · mMn(OH)$_{2}$ · nH$_{2}$O and AlOOH as a stage of the preparation of a MnO$_{ x }$-Al$_{2}$O$_{3}$ catalyst on its phase composition and catalytic activity in CO oxidation