Influence of preparation method on catalytic properties of mixed calcium-cobalt orthophosphates
Identifieur interne : 001069 ( Main/Curation ); précédent : 001068; suivant : 001070Influence of preparation method on catalytic properties of mixed calcium-cobalt orthophosphates
Auteurs : A. Legrouri [Maroc] ; S. S. Romdhane [Tunisie] ; J. Lenzi [France] ; M. Lenzi [France] ; G. Bonel [France]Source :
- Journal of Materials Science [ 0022-2461 ] ; 1996-05-01.
Descripteurs français
- Pascal (Inist)
English descriptors
Abstract
Abstract: Mixed calcium-cobalt orthophosphates of the formula Ca3−x COx(PO4)2, with 0 ⩽x ⩽ 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 β-Ca3(PO4)2 structure. The solubility limit of cobalt in this structure corresponded tox=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 β-Ca3(PO4)2 structure. Higher activities were obtained for samples prepared by coprecipitation.
Url:
DOI: 10.1007/BF01152963
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<front><div type="abstract" xml:lang="en">Abstract: Mixed calcium-cobalt orthophosphates of the formula Ca3−x COx(PO4)2, with 0 ⩽x ⩽ 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 β-Ca3(PO4)2 structure. The solubility limit of cobalt in this structure corresponded tox=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 β-Ca3(PO4)2 structure. Higher activities were obtained for samples prepared by coprecipitation.</div>
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<front><div type="abstract" xml:lang="en">Mixed calcium-cobalt orthophosphates of the formula Ca<sub>3-x</sub>
CO<sub>x</sub>
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</author>
</analytic>
<monogr></monogr>
<series><title level="j">Journal of Materials Science</title>
<title level="j" type="abbrev">J Mater Sci</title>
<idno type="ISSN">0022-2461</idno>
<idno type="eISSN">1573-4803</idno>
<imprint><publisher>Kluwer Academic Publishers</publisher>
<pubPlace>Dordrecht</pubPlace>
<date type="published" when="1996-05-01">1996-05-01</date>
<biblScope unit="volume">31</biblScope>
<biblScope unit="issue">9</biblScope>
<biblScope unit="page" from="2469">2469</biblScope>
<biblScope unit="page" to="2473">2473</biblScope>
</imprint>
<idno type="ISSN">0022-2461</idno>
</series>
<idno type="istex">A6BFB672B54B637CDAB9EE41BC82BFBACA18EE5A</idno>
<idno type="DOI">10.1007/BF01152963</idno>
<idno type="ArticleID">BF01152963</idno>
<idno type="ArticleID">Art33</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0022-2461</idno>
</seriesStmt>
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<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
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<front><div type="abstract" xml:lang="en">Abstract: Mixed calcium-cobalt orthophosphates of the formula Ca3−x COx(PO4)2, with 0 ⩽x ⩽ 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 β-Ca3(PO4)2 structure. The solubility limit of cobalt in this structure corresponded tox=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 β-Ca3(PO4)2 structure. Higher activities were obtained for samples prepared by coprecipitation.</div>
</front>
</TEI>
</ISTEX>
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