106 The benecial interaction between Au and MnOx
Figure 6.8: Scanning Electron Micrographs for pure Au(30%)-MnOx lm. a)
Overview image of the surface. b) Close-up revealing the surface structure.
Figure 6.9: Scanning Electron Micrographs for pure Au(50%)-MnOx lm. a)
Overview image of the surface. b) Close-up revealing the surface structure.
is not a straightforward analysis since the bright spots could also be caused by
charging eects due to areas with low electronic conductivity.
6.2.2 Electrochemical characterization
The activities of these thin lms were measured with cyclic voltammetry in 1
M KOH. A scan rate of 20 mV/s was used and for each type of sample three
independent measurements were performed. The results of those measurements
can be seen in gure 6.10, where the rst anodic scans for the three types of
lms are shown.
