Influence of preparation method on catalytic properties of mixed calcium-cobalt

被引:29
作者
Legrouri, A
Romdhane, SS
Lenzi, J
Lenzi, M
Bonel, G
机构
[1] ECOLE NATL INGENIURS,LAB CHIM MINERALE,GABES 6029,TUNISIA
[2] ECOLE NATL SUPER CHIM,CTR GENIE PHOTOCHIM,F-31077 TOULOUSE,FRANCE
[3] LAB PHYSICOCHIM SOLIDES,F-31400 TOULOUSE,FRANCE
关键词
D O I
10.1007/BF01152963
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Mixed calcium-cobalt orthophosphates of the formula Ca3-xCOx(PO4)(2), with 0 less than or equal to x less than or equal to 1.1, were prepared by coprecipitation and solid-state reaction. Structural characterization showed that, in both cases, the solids obtained resulted from substitution of some Ca2+ ions by Co2+ ions in the beta-Ca-3(PO4)2 structure. The solubility limit of cobalt in this structure corresponded to x = 0.31. The morphology of these compounds was investigated by surface-area measurements and scanning electron microscopy. When tested in the 2-propanol decomposition reaction, the maximum activity in dehydrogenation was obtained with the compound corresponding to cobalt maximum solubility in beta-Ca-3(PO4)2 structure. Higher activities were obtained for samples prepared by coprecipitation.
引用
收藏
页码:2469 / 2473
页数:5
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