ESCA study of "model" allyl-based Mo/SiO<inf>2</inf> catalysts

Abstract:

Stoichiometric redox measurements and X-ray photoelectron spectroscopy (XPS or ESCA) studies were performed on an allyl-based Mo/SiO2 catalyst (1.7 wt % Mo) obtained by the sublimation of Mo(η3-C3H5)4 onto SiO2 at 40°C The average oxidation state estimated from stoichiometric measurements correlated well with those reported in the literature. ESCA results indicated that reduction of the Mo/SiO2 catalyst at 550°C primarily led to the formation of Mo2+. Also, the results were consistent the reported reversibility of the redox cycle. However, the reported formation of discrete Mo4+ by oxidation of the reduced catalyst at room temperature could not be substantiated. © 1993 American Chemical Society.

Año de publicación:

1993

Keywords:

Fuente:

scopus