Table 1 Activation energies \(E_{\mathrm{act}}\) and estimated activation energies \(E_{\mathrm{act,e}}\) for the Volmer, Tafel, and Heyrovský step at the Mg(0001) surface.

From: A first-principles analysis of the charge transfer in magnesium corrosion

 

\(E_{\mathrm{act}}\)/eV

\( \nu \)/THz

k/\(\hbox {s}^{-1}\)

\(E_{\mathrm{act,e}}\)/eV

Volmer

0.66

14.9

\(1.1\times 10^{+2}\)

0.90

Tafel

1.26

86.7

\(4.8\times 10^{-8}\)

0.94

Heyrovský

0.28

0.9

\(1.4\times 10^{+7}\)

0.82

  1. Values for \(E_{\mathrm{act},\mathrm{e}}\) are based on the experimental exchange current density \(i_{0,\mathrm {HER}}=4\times 10^{-6}\,\mathrm {A}\,{\mathrm{cm}}^{-2}\), the calculated prefactor \(\nu\) and the reaction rate k.
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