The complete 51V MAS NMR spectrum of surface vanadia nanoparticles on anatase (TiO2): vanadia surface structure of a DeNOx catalyst

Ulla Gro Nielsen; Nan-Yu Topsøe; Michael Brorson; Jørgen Skibsted; Hans J Jakobsen

doi:10.1021/ja030091a

The complete 51V MAS NMR spectrum of surface vanadia nanoparticles on anatase (TiO2): vanadia surface structure of a DeNOx catalyst

J Am Chem Soc. 2004 Apr 21;126(15):4926-33. doi: 10.1021/ja030091a.

Authors

Ulla Gro Nielsen¹, Nan-Yu Topsøe, Michael Brorson, Jørgen Skibsted, Hans J Jakobsen

Affiliation

¹ Instrument Centre for Solid-State NMR Spectroscopy, Department of Chemistry, University of Aarhus, DK-8000 Aarhus C, Denmark.

PMID: 15080698
DOI: 10.1021/ja030091a

Abstract

The first observations of the complete manifold of spinning sidebands (ssbs) including both the central and satellite transitions in (51)V MAS NMR spectra of surface vanadia nanoparticles on titania in DeNO(x) catalysts are presented. (51)V quadrupole coupling and chemical shift anisotropy parameters for the dominating vanadia structure are determined from (51)V MAS NMR spectra recorded at 9.4 and 14.1 T. Based on correlations previously established between (51)V NMR parameters and crystal structure data for inorganic vanadates, the NMR data are consistent with vanadium in a distorted octahedral oxygen coordination environment for the so-called strongly bonded vanadia species on the surface. The investigation includes two vanadia-titania model catalysts and six industrial-type DeNO(x) catalysts.