Ethene adsorption on Pt3Cu(111)

The adsorption of ethene on the Pt3Cu(111) surface at 95 K has been studied by high-resolution electron energy loss spectroscopy (HREELS), temperature -programmed desorption (TPD), low-energy electron diffraction (LEED), and w ork-function change measurements. Both the TPD and HREELS measurements reve al the existence of two different ethene species on the surface. These spec ies can be identified as a weakly bonded pi-complex and a stronger bonded d i-sigma-complex. No ethene-induced superstructure has been found with LEED. The TPD experiments indicate that ethene is not dehydrogenated/decomposed when the surface is heated above the desorption temperature. (C) 1999 Elsev ier Science B.V. All rights reserved.