Reddy B M, Mastikhin V M
Catalysis Section, Indian Institute of Chemical Technology, Hyderabad.
Solid State Nucl Magn Reson. 1992 Dec;1(5):245-9. doi: 10.1016/0926-2040(92)90043-9.
A series of vanadia catalysts with various V2O5 loadings supported on SnO2 and alpha-Sb2O4 are investigated by the application of X-ray diffraction and solid-state 51V and 1H NMR techniques. XRD results show no evidence for the formation of a crystalline vanadia phase on both supports. However, the 51V NMR spectra of the catalysts reveal the existence of two types of vanadia species on the surface of the support: one due to a dispersed vanadia phase at lower vanadia loadings and the other due to a crystalline vanadia phase at higher vanadium content. The quantity of the dispersed vanadia phase, however, depends on the nature of the support material. The 1H NMR results provide evidence for the existence or non-existence of a metal oxide support interaction through the support surface hydroxyl groups.
通过应用X射线衍射以及固态51V和1H NMR技术，对一系列负载在SnO2和α-Sb2O4上、具有不同V2O5负载量的钒催化剂进行了研究。XRD结果表明，在两种载体上均未发现结晶钒氧化物相形成的证据。然而，催化剂的51V NMR光谱显示，在载体表面存在两种类型的钒氧化物物种：一种是由于较低钒负载量下的分散钒氧化物相，另一种是由于较高钒含量下的结晶钒氧化物相。然而，分散钒氧化物相的数量取决于载体材料的性质。1H NMR结果为通过载体表面羟基存在或不存在金属氧化物载体相互作用提供了证据。
