Adsorption studies of trichloroethylene (TCE) on MgO(100)/Mo(100)

作者：Kunz S^*; Schweinberger F F; Kwon G; Kiermaier J; Le Moal S; Henry C; Heiz U

来源：Surface Science, 2010, 604(23-24): 2184-2189.

DOI：10.1016/j.susc.2010.09.012

• UPS (He I)
• MIES
• TPD
• MgO
• Trichloroethylene (TCE)
• Physisorption

Employing ultraviolet photoelectron spectroscopy (UPS He I) the more surface sensitive metastable Impact electron spectroscopy (MIES) and temperature programmed desorption (TPD) measurements of the adsorption properties of the pollutant trichloroethylene (TCE) on thin MgO(100) films grown on a Mo (100) single crystal have been investigated From TPD spectra of different coverages it is concluded that TCE interacts only weakly with MgO which is attributed to physisorption For increasing coverages a change from one peak to two peaks in the TPD spectra one at higher the second at lower temperatures with respect to the single peak is detected Additionally the observation of a local minimum for the work WF) for both MIES and UPS spectra is presented Such a local minimum has been reported previously for the adsorption of metals with outer s valence electrons on transition metal substrates and adsorption of metals with outer s valence electrons on metal oxide films Herein we present the first WF minimu

• 出版日期2010-11