ESR study of monolayer vanadium oxide catalysts supported of different supports in relation to catalytic oxidation of methanol

• Autorzy: Haber, J. , Nowak, P. , Serwicka, E. M. , Wachs, I. E.
• Języki publikacji: EN

Abstrakty

EN

Vanadia monolayers deposited on various oxide supports (Zr02, Nb(2)O(5), TiO2, Al(2)O(3) and Si0(2) have been investigated with the aid of electron spin resonance. The results show that the electronic structure of reduced vanadyl species generated during methanol chemisorption depends on the nature of the supporting matrix. This is shown by changes of theBeta(2) bonding coefficient calculated from the experimentally determined ESR parameters. I t is demonstrated that the catalytic activity in methanol oxidation, ex-pressed in terms of turnover frequency (TOF), can be correlated with the latter parameter and increases with the ionicity of the vanadyl in-plane Pi-bonding system.

Słowa kluczowe

PL

wanad; katalizator; elektronowy rezonans spinowy; metanol; utlenianie

EN

vanadium; catalyst; ESR spectroscopy; methanol; oxidation

• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2000
• Tom: Vol. 48, No. 4
• Strony: 337-346
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Haber, J.

autor

Nowak, P.

autor

Serwicka, E. M.

autor

Wachs, I. E.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland (Instytut Katalizy i Fizykochemii Powierzchni PAN)