Fig. 17.1. (a) EEL spectra of thin defect-poor
and defect-rich MgO(100) films grown on
Mo(100) under different experimental conditions (see text). A to D are losses, which
are attributed theoretically to transitions
characteristic of neutral F centers on MgO. (b)
Model of an oxygen vacancy at a terrace of a
MgO(100) surface with chemisorbed CH 3 aOH
(CH 3 O
À aH
þ ). (c) Thermal desorption spectra
of CH 3 OH and H 2 on defect-poor and defectrich MgO(100) films. Note the desorption of
H 2 at 580 K for defect-rich films. The insets
show FTIR spectra recorded at 90 K for
adsorbed CH 3 OH on both defect-poor and
defect-rich films.
17 Nanocatalysis
554
and defect-rich MgO(100) films grown on
Mo(100) under different experimental conditions (see text). A to D are losses, which
are attributed theoretically to transitions
characteristic of neutral F centers on MgO. (b)
Model of an oxygen vacancy at a terrace of a
MgO(100) surface with chemisorbed CH 3 aOH
(CH 3 O
À aH
þ ). (c) Thermal desorption spectra
of CH 3 OH and H 2 on defect-poor and defectrich MgO(100) films. Note the desorption of
H 2 at 580 K for defect-rich films. The insets
show FTIR spectra recorded at 90 K for
adsorbed CH 3 OH on both defect-poor and
defect-rich films.
17 Nanocatalysis
554