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nature : Tafel (Tafel) in the 1905 study of hydrogen-electric potential and found that in a certain range, super-potential (η) and the current density (i) are as follows : η = a blog + | i |. This formula-known as the Tafel, a, b known as the Tafel constants, they decided to electrode material, electrode surface, temperature and solution composition. Determination of a, b value of the electrode kinetics studies are an important means, and also projected industrial electrolytic cell voltage electrode and the current density of one basis. The formula is applied to the higher current density region. I very much in the hour - this does not apply. I in a small, super-electric potential are very small (η < ± 0.03 volts), the ultra-potential and current density is linear, η = ki. K ratio constant.
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