Cluster molecular modeling of strong interaction for VOx/TiO2 supported catalyst

✍ Scribed by Nelly A. Kachurovskaya; Emiliya P. Mikheeva; Georgii M. Zhidomirov

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 207 KB
• Volume: 178
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(01)00301-6

✦ Synopsis

Cluster molecular models of VO x /TiO 2 catalytic system based on embedding process of V-ion in the anatase support were considered. Cluster structures of (0 0 1) anatase surface, containing one-and two-layer were constructed and isomorphous substitution of two Ti-ions on two V-ions were calculated. Comparison of the Brönsted acidic properties of V-OH group on the surface of V 2 O 5 and supported VO x /TiO 2 species showed that embedding procedure increases their acidic power and the influence of the second layer of the support is essentially important. Formation of ammonium ion under the adsorption of NH 3 on supported and unsupported vanadium oxide catalyst was considered and discussed.