Characterisation of strongly bonded V(V) species in VOx/TiO2 catalyst by static and MAS solid-state 51V NMR spectroscopy

被引：36

作者：

Shubin, AA ^{[1
]}

Lapina, OB ^{[1
]}

Bondareva, VM ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 302卷 / 3-4期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0009-2614(99)00103-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

V-51 static and MAS NMR spectroscopy of central transition is shown to be an effective method for the characterisation of strongly bonded V(V) species in VOx/TiO2 catalysts. Simultaneous determination of quadrupole and CSA tensors parameters (i.e., C-Q, eta(Q), delta(sigma), eta(sigma)) from both static and MAS NMR spectra of central transition permits the extraction of all NMR parameters with a reasonable accuracy. For the first time, a large V-51 quadrupolar constant (14-16 MHz) has been obtained for strongly bonded V(V) species in a supported vanadia catalyst, whereas CSA tensor principal components were found to be very close to those for bulk vanadium (V) oxide. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：341 / 346

页数：6

共 23 条

[1] SIMULATION OF NMR POWDER SPECTRA [J].