XPS analysis on tungten oxide nanoclusters supported on MCM41.

The analysis of the binding energy values and a detailled analysis of the splitting resulting from the j-j coupling on the X ray-photoelectron spectra of a series of samples will provide information on the disspersion and size domain of the WOx species. A surface analysis is also proposed desirable to evaluate the degree of disspersion of the WOX species over the MCM41 surface.