Mossbauer study of perovskite oxides for oxidative coupling of CH4 and absorption of CO2

被引：5
作者：
Nomura, K
Homonnay, Z
Vertes, A
Chechersky, V
Nath, A
Ujihira, Y
Hayakawa, T
Takehira, K
机构：
[1] EOTVOS LORAND UNIV, DEPT NUCL CHEM, H-1518 BUDAPEST 112, HUNGARY
[2] DREXEL UNIV, DEPT CHEM, PHILADELPHIA, PA 19104 USA
[3] UNIV TOKYO, ADV SCI & TECHNOL RES CTR, MEGURO KU, TOKYO 153, JAPAN
[4] NATL INST MAT & CHEM RES, TSUKUBA RES CTR, TSUKUBA, IBARAKI 305, JAPAN
来源：
CZECHOSLOVAK JOURNAL OF PHYSICS | 1997年 / 47卷 / 05期
关键词：
D O I：
10.1023/A:1021251221571
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Perovskite oxides, (Ba0.95Ca0.05)(Co1-xFex) O3-delta, are prominent materials for oxidative coupling of methane and for CO2 absorption at high temperature, and these oxides before and after treatment in CH4 and CO2 atmosphere were analysed by Mossbauer spectroscopy. The perturbation of microstructure by substitution of Ha sites with Ca, and the electron transfer of mixed valences in Fe and Co ions with the formation of oxygen vacancies at high temperatures, are considered to contribute strongly to the selectivity of CH4 coupling and the rapid absorption of CO2 at high temperatures.
引用
收藏
页码：517 / 522
页数：6
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