EPR study of surface coordination effects on the stabilization of dispersed chromium (V) species at the surface of various oxides

✍ Scribed by Eric G. Derouane; René Hubin; Gilbert Mathieu

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 411 KB
• Volume: 33
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(75)85776-9

✦ Synopsis

EPR has been used to monitor the adsorption of the Cr(V)-l,21t:lylene-diol complex on various basic and acidic oxides and to study the relative stability and degree of dispersion of the cbtained Cr(V, and Cr(iI1) species. It is shown that G(V) species are most stable on oxides chxacterized by high surface coordination numbers. After evacuation at moderate temperature, Cic[II) is usually obtained in a high dispersion state. * Work supported by a grant of F.R.F.C. (Belgium). ** To whom queries concerning this paper should be sent.