Kinetics of electrochemical reactions
Fundamentals and Survey of Systems
Thermodynamics and kinetics of fuel cell reactions
Published Online: 15 DEC 2010
Copyright © John Wiley & Sons, Ltd. All rights reserved.
Handbook of Fuel Cells
How to Cite
Hamnett, A. 2010. Kinetics of electrochemical reactions. Handbook of Fuel Cells. .
- Published Online: 15 DEC 2010
This chapter explores the dependence of the rate of electrochemical reactions on the potential difference accommodated in the double layer. The concept of overpotential is introduced, and the theory of electron transfer at the electrode–electrolyte interface described. The derivation of the Butler–Volmer equation is shown to depend on the reorganization energy of the fundamental electrochemical reaction being large compared to the electrical energy associated with the electron transfer process across the interface. The pre-exponential expression in the Butler–Volmer equation, the exchange current, is shown to depend on the fundamental kinetics of the electrochemical reaction, and some simple examples are given.
- reorganization energy;
- Butler–Volmer equation;
- exchange-current density;
- Franck–Condon principle