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Title

Effect of Sr substitution on structural, redox and catalytic properties of nano-particles La۱-xSrxMn۰.۵Co۰.۵O۳ (x = ۰.۰, ۰.۱, ۰.۲, ۰.۳, ۰.۴, ۰.۵) as a catalyst for CO oxidation

فصلنامه مواد پیشرفته و فرآوری، دوره: 2، شماره: 4
Year: 1393
COI: JR_JMATPR-2-4_008
Language: EnglishView: 44
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Authors

Marzieh Lotfi - School of Physics, Damghan University (DU), Damghan, I. R. Iran.
Ahmad Gholizadeh - School of Physics, Damghan University (DU), Damghan, I. R. Iran.
Azim Malekzadeh - School of Chemistry, Damghan University (DU), Damghan, I. R. Iran.

Abstract:

Structural features of La(۱-x)SrxMn۰.۵Co۰.۵O۳ (x = ۰.۰, ۰.۱, ۰.۲, ۰.۳, ۰.۴, and ۰.۵) nano-particles were investigated using X-ray powder diffraction and FT-IR spectroscopy. The characterization of compounds by X-ray powder diffraction and using Fullprof program show a cubic structure (Pm۳m space group) for x = ۰.۰ and a rhombohedra structure (R-۳c space group) for the Sr substituted La(۱-x)SrxMn۰.۵Co۰.۵O۳ samples. Crystallite size and unit cell parameters decrease with Sr substitution. The electrical conductivity of the samples in oxidizing (air) and reducing atmosphere (۶%CO in nitrogen) and also band gap of the samples has been investigated to interpret the performance of samples. Results show that their behavior increases non-uniformly with increase in Sr substitution. An increase of Sr substitution up to ۰.۵ increases the performance of the samples and an optimal catalytic activity in the low-temperature conversion of CO to CO۲. It is mainly attributed to a decrease of the crystallite size.

Keywords:

Manganite-Cobaltite , Air Pollutants , Conversion of CO to CO۲

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This Paper COI Code is JR_JMATPR-2-4_008. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1282701/

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Lotfi, Marzieh and Gholizadeh, Ahmad and Malekzadeh, Azim,1393,Effect of Sr substitution on structural, redox and catalytic properties of nano-particles La۱-xSrxMn۰.۵Co۰.۵O۳ (x = ۰.۰, ۰.۱, ۰.۲, ۰.۳, ۰.۴, ۰.۵) as a catalyst for CO oxidation,https://civilica.com/doc/1282701

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Type of center: دانشگاه دولتی
Paper count: 1,687
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