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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 12, Number 1
BKCSDE 12(1)
January 20, 1991 

FT-IR Studies of Molybdena Supported on Titania
Kwan Kim*, Soon-Bo Lee
Fourier transform infrared spectroscopy has been applied to the characterization of titania supported molybdena. The equilibrium adsorption method seemed to produce molybdena species homogeneously dispersed on the support. Even under an oxidizing environment, molybdena species appeared to be able to possess coordinatively unsaturated Mo5+ ions owing to the natures of TiO2, i.e. oxygen deficiency and permeability toward oxygen diffusion. At the initial stage of reduction, the terminal double bond oxygen ( Mo=O ) seemed to be removed, generating presumably Mo4+. The carbonyl bands at 2198 and 2190 cm-1 observed after CO exposure were attributed to the Mo5+…CO and Mo4+…CO complexes, respectively, while the band pair at 2136 and 2076 cm-1 to Mo4+(CO)2.
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