Determination of the coordination geometry of supported vanadium catalysts by electron spin echo modulation analysis

Abstract

Electron spin echo modulation analysis was used to characterize the coordination geometry of the paramagnetic vanadium species formed in the 0.25% V 2O 5 in SiO 2 with D 2O adsorbate. The deuterium modulation indicates one deuteron at 0.23 nm and four deuterons at 0.26 nm. The four farther deuterons are interpreted as due to two-coordinated water molecules.