Solved: Use the data in Table 25.6 for the exchange current density and transfer
Chapter 25, Problem 25.19(a)(choose chapter or problem)
Use the data in Table 25.6 for the exchange current density and transfer coefficient for the reaction 2 H+ + 2 eH2 on nickel at 25C to determine what current density would be needed to obtain an overpotential of 0.20 V as calculated from (a) the ButlerVolmer equation, and (b) the Tafel equation. Is the validity of the Tafel approximation affected at higher overpotentials (of 0.4 V and more)?
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