Effect of structural disorder on the catalytic activity of mixed La-Sr-Co-Fe-O perovskites

被引：18

作者：

Isupova, LA ^{[1
]}

Sadykov, VA ^{[1
]}

Tsybulya, SV ^{[1
]}

Kryukova, GN ^{[1
]}

Ivanov, VP ^{[1
]}

Petrov, AN ^{[1
]}

Kononchuk, OF ^{[1
]}

机构：

[1] URAL STATE UNIV,EKATERINBURG 620083,RUSSIA

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 1997年 / 62卷 / 01期

关键词：

perovskite; defect structure; carbon monoxide; oxidation;

D O I：

10.1007/BF02475723

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

For a perovskite system La0.7Sr0.3Co1-xFexO3, the effect of partial substitution of Co by Fe on the particle microstructure and chemical composition of the surface layer has been studied. Iron incorporation was found to cause a structure rearrangement from the hexagonal (at x < 0.05) to the cubic (at x>0.05) type, which was not accompanied by any appreciable variation of the surface layer composition. A transient sample with x= 0.05 was characterized by a high degree of misorientation of microblocks and had the highest activity in the CO catalytic oxidation.

引用

页码：129 / 135

页数：7

共 9 条

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[2]

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[3]

ISUPOVA LA, 1994, REACT KINET CATAL LE, V55, P223

[4]

JAMAZOE N, 1990, CATAL TODAY, V8, P175