Overpotential implications

This form discloses an immediate general implication in Eqs. 2.9)-(2.12), namely a pronounced ( spectroscopic ) maximum in the tunneling current-overpotential relation (at given bias voltage). For the symmetric configuration of Eq. (2.12), the maximum appears at the overpotential... 

Such considerations (Gaussian or Maxwellian) have implications for the form of the current-potential relation. According to the Gaussian model, the cathodic current is related to overpotential by ... 

After establishing that the mechanistic predictions are as expected, we turn to the electrocatalytic implications of Figure 14. If, instead of attempting a correlation at constant 17, we try a correlation at constant i (i.e., overpotential at constant current density as a function of AGads), a rather convenient and direct comparison with experimental data is possible, avoiding extrapolations over wide potential ranges in the case of many metals. A convenient i value, which occurs in practically all experimental Tafel plots, is 10 A cm. ... 

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