ADSORPTION OF METHANOL ON TIC(100) AND TIC(111) SURFACES

The adsorption of methanol on TiC(100) and (111) surfaces has been stu died using ultraviolet photoelectron spectroscopy (UPS). Methanol is a dsorbed molecularly on the neutral TiC(100) surface at room temperatur e. It is shown by UPS study that the molecular orbitals localized to t he oxygen atom are selectively stabilized through adsorption, indicati ng that the methanol molecule is bonded to the TiC(100) surface via th e oxygen atom. On the other hand, methanol is adsorbed dissociatively on the polar TIC(111) surface; methoxy species and completely dissocia ted atomic species (C, H and O atoms) are coexistent on the TiC(111) s urface after methanol adsorption at room temperature. (C) 1998 Elsevie r Science B.V.