32
1 Surface Thermodynamics of Solid Electrode
1.0
0.8
0.6
0.4
0.2
0.0
'
-2
0.8
0.6
0.4
0.2
0.0
-0.2
E / V (SHE)
Au (111)
pH 3.0, 0.5 M NaClO 4
5 mV s
-1
g / J m
Fig. 1.10 Surface stress versus potential ((g vs. E) curve measured by a cantilever bending method
at a potential scan rate of 5 mV s −1 in the potential region between −0.24 and 0.80 V (SHE) for an
unreconstructed, (111)-textured Au thin-film electrode in pH 3.0, 0.5 M NaClO 4 solution [33]. The
values of in the ordinate of Fig. 1.10 are arbitrarily referred to zero at 0.80 V (SHE). Reproduced
from [33] with permission from The Electrochemical Society
corresponding to −q =
∂q
∂ε
E
. As pointed out by Valincius [25], the potential of
the surface stress maximum is not equal to the potential of zero charge. If
∂q
∂ε
E
has a positive value, the potential of the surface stress maximum should be more
negative than the potential of zero charge E pzc . Schmickler and Leiva [18] suggested
the possibility for the surface stress passing through a maximum in the vicinity of
E pzc in the absence of contact or specific adsorption. The strain dependence of the
surface charge density
∂q
∂ε
E
is regarded as one of the important parameters for
characterizing a solid electrode.
1 Surface Thermodynamics of Solid Electrode
1.0
0.8
0.6
0.4
0.2
0.0
'
-2
0.8
0.6
0.4
0.2
0.0
-0.2
E / V (SHE)
Au (111)
pH 3.0, 0.5 M NaClO 4
5 mV s
-1
g / J m
Fig. 1.10 Surface stress versus potential ((g vs. E) curve measured by a cantilever bending method
at a potential scan rate of 5 mV s −1 in the potential region between −0.24 and 0.80 V (SHE) for an
unreconstructed, (111)-textured Au thin-film electrode in pH 3.0, 0.5 M NaClO 4 solution [33]. The
values of in the ordinate of Fig. 1.10 are arbitrarily referred to zero at 0.80 V (SHE). Reproduced
from [33] with permission from The Electrochemical Society
corresponding to −q =
∂q
∂ε
E
. As pointed out by Valincius [25], the potential of
the surface stress maximum is not equal to the potential of zero charge. If
∂q
∂ε
E
has a positive value, the potential of the surface stress maximum should be more
negative than the potential of zero charge E pzc . Schmickler and Leiva [18] suggested
the possibility for the surface stress passing through a maximum in the vicinity of
E pzc in the absence of contact or specific adsorption. The strain dependence of the
surface charge density
∂q
∂ε
E
is regarded as one of the important parameters for
characterizing a solid electrode.