Synthesis and characterization of cobalt-molybdenum oxides catalysts supported on magnesium phosphates
M. Sadiq1, A. Sahibed-dine1, M. Baalala1, K. Nohair1, M. Bensitel1*,
E. Payen2, C. Lamonier2, J. Leglise3,4
1Laboratoire de Catalyse et Corrosion des Matériaux, Université Chouaib Doukkali, Faculté des Sciences,
B.P. 20, El Jadida 24000 Morocco
2Laboratoire de Catalyse, UMR.CNRS.8010, Université de Lille 1, 59650 Villeneuve d’Ascq. Lille, France
3Laboratoire de Catalyse et Spectrochimie, UMR.CNRS.6506, ENSICAEN, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France
4 present address : DRRT, 2 rue Grenet Tellier, 51038 Châlons en Champagne, France
* Corresponding author. E-mail: email@example.com
Received : 22 February 2005; revised version accepted :29 June 2005
In this work, magnesium phosphates named MgP were synthesized by coprecipitation from an aqueous solution containing Mg(NO3)2.6H2O and H3PO4 (85%) with addition of an 0.4 M NaOH solution until pH 9. The solids Co-Mo/MgP were synthesized by the dry-impregnation method, with loadings ranging from 4 to 12 wt.% of MoO3 with a Co/Mo atomic ratio fixed at 0.5. The solids obtained were then characterised by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA), infrared spectroscopy (IR); and their specific surface area were determined using gas adsorption measurements of nitrogen.
Keywords: Magnesium phosphates; Co-Mo/MgP; XRD; TGA-TDA; IR; BET.