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Fuel Cells
book

Fuel Cells

by Shripad T. Revankar, Pradip Majumdar
May 2014
Beginner to intermediate content levelBeginner to intermediate
748 pages
23h 13m
English
CRC Press
Content preview from Fuel Cells
170 Fuel Cells
The rate constants for the forward and backward reactions, k
f
, k
b
, can then
be modied to
k
kT
h
e
G
RT
ig
f
B
=
(5.29)
and
k
kT
h
e
G
RT
ng
b
B
=
(5.30)
for a reaction that occurs in n-steps with the gth step being the rate-controlling
step.
As mentioned earlier on the energetic reactions, the reactions rates can be
modied by changing the potential difference across the electrode and the
electrolyte. Consider the electron transfer reaction
Ox
eR
ed.
Red
Ox
+−
+ n
k
k


(5.31)
The rate constants k
Ox
and k
Red
can be inuenced by the applied voltage
according to the transition state theory from chemical kinetics. When a
potential is applied to ...
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Publisher Resources

ISBN: 9781420089684