Influence of the Mobility of Oxygen on the Reactivity of La1 – xSrxMnO3 Perovskites in Methane Oxidation Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2011, Volume: 52, Number: 3, Pages: 401-408 Pages count : 8 DOI: 10.1134/S0023158411030086 | ||
| Tags | Manganite; Methane Oxidation; Lattice Oxygen; Apparent Rate Constant; Oxygen Mobility | ||
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Abstract:
Radically different dependences of the activity of La1 − x Sr x MnO3 (x = 0−0.5) perovskites in methane oxidation on the degree of substitution of strontium for lanthanum are observed for low and high temperatures. Unsubstituted LaMnO3 exhibits the highest activity in the temperature range from 300 to 500°C, while the sample with the maximum degree of substitution (La0.5Sr0.5MnO3) shows the highest activity at higher temperatures of 700–900°C. In the low temperature region, the activity of La1t - x Sr x MnO3 is determined by the amount of weakly bound (overstoichiometric) oxygen, which is formed in cation-deficient lattices and is characterized by a thermal desorption peak with T max = 705°C. At higher temperatures (800–900°C), the strongly bound oxygen of the catalyst lattice is involved in the formation of the reaction products under both unsteady- and steady-state conditions. As a consequence, the catalytic activity in methane oxidation correlates with the apparent rate constant of oxygen diffusion in the oxide bulk.
Cite:
Ivanov D.V.
, Pinaeva L.G.
, Sadovskaya E.M.
, Isupova L.A.
Influence of the Mobility of Oxygen on the Reactivity of La1 – xSrxMnO3 Perovskites in Methane Oxidation
Kinetics and Catalysis. 2011. V.52. N3. P.401-408. DOI: 10.1134/S0023158411030086 WOS Scopus РИНЦ ANCAN OpenAlex
Influence of the Mobility of Oxygen on the Reactivity of La1 – xSrxMnO3 Perovskites in Methane Oxidation
Kinetics and Catalysis. 2011. V.52. N3. P.401-408. DOI: 10.1134/S0023158411030086 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Иванов Д.В.
, Пинаева Л.Г.
, Садовская Е.М.
, Исупова Л.А.
Влияние подвижности кислорода на реакционную способность перовскитов состава La1-xSrxMnO3 в реакции окисления метана
Кинетика и катализ. 2011. Т.52. №3. С.410-418. РИНЦ
Влияние подвижности кислорода на реакционную способность перовскитов состава La1-xSrxMnO3 в реакции окисления метана
Кинетика и катализ. 2011. Т.52. №3. С.410-418. РИНЦ
Dates:
| Submitted: | Apr 23, 2010 |
| Published print: | May 1, 2011 |
| Published online: | Jun 8, 2011 |
Identifiers:
| Web of science: | WOS:000291397200010 |
| Scopus: | 2-s2.0-79959497761 |
| Elibrary: | 16984656 |
| Chemical Abstracts: | 2011:709716 |
| Chemical Abstracts (print): | 155:406751 |
| OpenAlex: | W1973868412 |