WOLFRAM|DEMONSTRATIONS PROJECT

Redox Reaction (E) at a Rotating Disk Electrode (RDE)

​
O + e
K
r
⟷
K
o
R
log ​
o
k
cm
-1
s
​​
-3.5
α
r
0.5
*
c
O
mol
-3
cm
​
0.00001
*
c
R
mol
-3
cm
​
0.00001
Ω/rpm
4000.
limiting cases
(E-
o
E
​)/V
0.2
This Demonstration plots the current density versus potential (
j
f
versus
E
) curve for a redox reaction (
O+e⟷R
) under steady-state conditions at a rotating disk electrode. Simulated concentration profiles are shown, along with linearized (piecewise linear) concentration profiles of electroactive species using Levich theory. IUPAC conventions are used.
D
O
=
D
R
=D=5.×
-6
10
2
cm
-1
s
;
ν=
-2
10
2
cm
-1
s
.