10-5
separation of the peak potentials is 57/n mV (n = number of electrons transferred per
molecule).
+E
-E
HIGH
INITIAL
LOW E
3
SCAN SEGMENTS
21
t
Figure 10-2.
Potential wave form for
CV.
The peak current for a reversible process is given by the Randles-Sevcik equation:
ixnADC
p
=
−
269 10
532 12 12
.
///
υ
where: i
p
= peak current (A)
n = number of electrons transferred per molecule
A = electrode surface area (cm
2
)
D = diffusion coefficient (cm
2
/s)
C = concentration (mol/cm
3
)
υ
= scan rate (V/s)
Figure 10-3.
Typical current response for
CV
.
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