A study of the electronic structure and reactivity of V/TiO_2(110)with metastable impact electron spectroscopy(MIES)and ultraviolet photoelectron spectroscopy(UPS)

摘要

The interaction of vanadium with TiO_2(110)surface was studied with metastable impact electron spectroscopy(MIES)and ultraviolet photoelectron spectroscopy(UPS)under ultrahigh vacuum(UHV)conditions.A strong interaction between vanadium and TiO_2 is observed with the addition of the first vanadium layer.Adsorption and reaction of ethanol to ethylene were investigated with MIES,UPS and temperature programmed desorption(TPD)and found to be sensitive to the surface electronic structure.In particular the temperature of ethylene evolution decreased by approx 100 K with a change in the vanadium coverage from 0.5 to 5 ML.