Definition of overpotential Overpotential
o•ver•po•ten•tial
We found 1 definitions of overpotential from 1 different sources.
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What does overpotential mean?
Wiktionary 
- overpotential (Noun)
The difference between the electric potential of an electrode or cell under the passage of a current and the thermodynamic value of the electrode or cell potential in the absence of electrolysis.
