Surface characterization and catalytic properties of perovskite type solid oxide solutions, La0.8Sr0.2BO3( B=Cr, Mn, Fe, Co or Y)

被引：70

作者：

Gunasekaran, N ^{[1
]}

Bakshi, N ^{[1
]}

Alcock, CB ^{[1
]}

Carberry, JJ ^{[1
]}

机构：

[1] UNIV NOTRE DAME, DEPT ELECT ENGN, CTR SENSOR MAT, NOTRE DAME, IN 46556 USA

来源：

SOLID STATE IONICS | 1996年 / 83卷 / 1-2期

关键词：

catalysis; chromium oxide; oxide solutions; perovskite; yttrium oxide;

D O I：

10.1016/0167-2738(95)00232-4

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：

The surface compositions of La0.8Sr0.2BO3 (B = Cr, Mn, Fe, Co or Y) were investigated by X-ray photoelectron spectroscopy (XPS). Among the five solid oxide solutions, the yttrium showed the highest concentration in the surface atomic ratio [B-ion/(La + Sr)]. Furthermore, the Ols spectra characteristics of yttrium perovskite are found to be different from those of the other solid solutions with the peak shifted to higher binding energy value. The electrical conductivity of La0.8Sr0.2CrO3 and La0.8Sr0.2YO3 were also measured as a function of temperature in air. The E(sigma) values for conduction were found to be 0.12 and 0.72 eV respectively. The conductivity data correlated well with the catalytic activity of these solid solutions for the oxidation of methane.

引用

页码：145 / 150

页数：6

共 28 条

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