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

Autor:	S. S. Romdhane, M. Lenzi, G. Bonel, Ahmed Legrouri, J. Lenzi
Rok vydání:	1996
Předmět:	Chemistry Coprecipitation Scanning electron microscope Mechanical Engineering Inorganic chemistry chemistry.chemical_element Catalysis chemistry.chemical_compound Mechanics of Materials General Materials Science Dehydrogenation Solubility Cobalt Chemical decomposition Cobalt phosphate
Zdroj:	Journal of Materials Science. 31:2469-2473
ISSN:	1573-4803 0022-2461
DOI:	10.1007/bf01152963
Popis:	Mixed calcium-cobalt orthophosphates of the formula Ca3−xCOx(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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::79b621f302cccdb8f23613534f4f486d https://doi.org/10.1007/bf01152963 Zobrazit plný text záznamu Full text from SpringerLink