J. Phys. IV France
Volume 123, March 2005
Page(s) 213 - 218

J. Phys. IV France 123 (2005) 213-218

DOI: 10.1051/jp4:2005123037

Characterization of active sites on W2-xMox(PO4)2 ( $0 \le x \le 1.25$) in butan-2-ol conversion

M. Kacimi1, S. Gharbage1, F. Bozon-Verduraz2 and M. Ziyad2

1  Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie, Rabat, Maroc
2  Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, 2 place Jussieu, 75251 Paris, France

The molybdenum-tungsten phosphate (W $_{2-{\rm x}}$Mo$_{\rm x}$O3(PO 4)2) was synthetised and characterised using several techniques. Its catalytic performances was studied in butan-2-ol conversion. The UV-visible investigations showed that the catalyst contains Mo(V) ions. This results was confirmed by the EPR spectra. Additional U.V. visible in-situ experimentss, in dynamic conditions revealed that butan-2-ol reduces Mo(VI) into Mo(V) ions. The active sites in the catalytic reaction appearto be built up arround the Mo(VI) ions.

© EDP Sciences 2005