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overpotential;overvoltage
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nature : for a given electrode reaction, when the electrode E Electric from its balance electrothermal Ep, deviated from its value as η-electric potential, or over-voltage, η = E - Ep. It embodies the mission of the electrode reaction to be conducted by the needed impetus, current density, temperature, pressure, concentration, electro-catalyst for the different conditions, and its potential - can be very different, for example in acid aqueous medium cathode hydrogen reaction, the same for 10 mA / cm two of the current density of different metals : zinc, iron and platinum on the hydrogen-electric potential 1.2,0.4 and about 0.08 volts. In industrial production, super-electric potential is more energy-consuming one of the reasons, but sometimes can be used, such as the high-zinc-hydrogen potential benefit electrolytic refining high-purity zinc, also helps to reduce the zinc-manganese batteries self discharge.


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More Detailed Data:
1) overpotential
2) hydrogen overpotential
3) reaction overpotential
4) reaction overpotential
5) diffusion overpotential
6) charge transfer overpotential
7) crystallization overpotential
8) electrochemical polarization
9) potential
10) potential;electric potential
Notice Some description was translated by software and the data is only as a reference.
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