Thermal desorption of CO, O 2 and CH 4 molecules from Ni(111) single crystals

Abstract

The thermal desorption of CO, O 2 and CH 4 molecules from a Ni(111) single crystal surface has been studied by Low Energy Electron Diffraction (LEED), Auger Electron Spectroscopy (AES) and Mass Spectroscopy. The crystal surface was exposed to the above molecules at pressures from 10 -9 to 10 -5 Torr. Surface structures and bonding were studied by the above techniques. The absolute coverage of the molecules on the surface was measured and activation energies for thermal desorption were measured for each case.