What does overpotential mean?
Definitions for overpotential
over·po·ten·tial
This dictionary definitions page includes all the possible meanings, example usage and translations of the word overpotential.
Wiktionary
overpotentialnoun
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
Wikipedia
Overpotential
In electrochemistry, overpotential is the potential difference (voltage) between a half-reaction's thermodynamically-determined reduction potential and the potential at which the redox event is experimentally observed. The term is directly related to a cell's voltage efficiency. In an electrolytic cell the existence of overpotential implies that the cell requires more energy than thermodynamically expected to drive a reaction. In a galvanic cell the existence of overpotential means less energy is recovered than thermodynamics predicts. In each case the extra/missing energy is lost as heat. The quantity of overpotential is specific to each cell design and varies across cells and operational conditions, even for the same reaction. Overpotential is experimentally determined by measuring the potential at which a given current density (typically small) is achieved.
Wikidata
Overpotential
Overpotential is an electrochemical term that refers to the potential difference between a half-reaction's thermodynamically determined reduction potential and the potential at which the redox event is experimentally observed. The term is directly related to a cell's voltage efficiency. In an electrolytic cell the overpotential requires more energy than thermodynamically expected to drive a reaction. In a galvanic cell overpotential means less energy is recovered than thermodynamics would predict. In each case the extra or missing energy is lost as heat. Overpotential is specific to each cell design and will vary between cells and operational conditions even for the same reaction. Practically it is also useful to define the current density at which the overpotential is measured.
Numerology
Chaldean Numerology
The numerical value of overpotential in Chaldean Numerology is: 4
Pythagorean Numerology
The numerical value of overpotential in Pythagorean Numerology is: 1
Translations for overpotential
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- overpotentialHindi
- overpotentialIndonesian
- sovrapotenzialeItalian
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"overpotential." Definitions.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.definitions.net/definition/overpotential>.
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