Insights into the Reactivity of La1−xSrxMnO3 (x = 0 ÷ 0.7) in High Temperature N2O Decomposition
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Catalysis Letters
ISSN: 1011-372X
, E-ISSN: 1572-879X
|
| Output data |
Year: 2011,
Volume: 141,
Number: 2,
Pages: 322-331
Pages count
: 10
DOI:
10.1007/s10562-010-0503-0
|
| Tags |
La-Sr-Mn mixed oxide, Layer-structured perovskite, Microdistortions, Nitrous oxide decomposition, Oxygen mobility, Polymorphic phase transition |
| Authors |
Ivanov D.V.
1
,
Pinaeva L.G.
1
,
Isupova L.A.
1
,
Nadeev A.N.
1
,
Prosvirin I.P.
1
,
Dovlitova L.S.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Siberian Branch of the Russian
Academy of Sciences, Pr. Acad. Lavrentieva 5, Novosibirsk
630090, Russia
|
|
In this paper a wide range of La1−x Sr x MnO3 (x = 0–0.7) perovskites was synthesized by Pechini route, characterized by XRD (including high temperature measurements), XPS, differential dissolution phase analysis, TPR H2, oxygen exchange and tested in N2O decomposition at 900 °C. At low degree of Sr substitution for La (x ≤ 0.3), high catalytic activity was found for perovskites with hexagonal structure (x = 0.1–0.2) and can be related to fast oxygen mobility caused by the lattice disordering during polymorphic phase transition from the hexagonal to cubic structure. For multiphase samples (x > 0.3) increase of activity and oxygen mobility can be attributed to the formation of the layer-structured perovskite–LaSrMnO4 on the surface.