TPR-study of substitution effects on reducibility and oxidative non-stoichiometry of La0.8A′0.2MnO3+δ perovskites

被引：32

作者：

Buciuman, FC ^{[1
]}

Patcas, F ^{[1
]}

Zsakó, J ^{[1
]}

机构：

[1] Univ Babes Bolyai, Dept Chem & Chem Engn, R-3400 Cluj Napoca, Romania

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2000年 / 61卷 / 03期

关键词：

catalyst; lanthanum manganite; non-stoichiometry; perovskite; TPR;

D O I：

10.1023/A:1010153331841

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

La(0.8)A'0.2MnO3+delta (A'=Sr, Ba, K, Cs) perovskites were studied by temperature-programmed reduction. The amount of non-stoichiometric oxygen was found to decrease from delta =0.16 for LaMnO3+delta to delta =0.07 (Sr-), 0.06 (Ba-), 0.07 (K-) and 0.03 (Cs-) substituted manganites. The reducibility at low and mean-temperatures (t < 500 degreesC) increased in the sequence La less than>(*) over bar * (La, Sr)approximate to>(*) over bar * (La, Ba)less than>(*) over bar * (La, Cs)less than>(*) over bar * (La, K).

引用

页码：819 / 825

页数：7

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