Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient for the reaction: 2 H+ + 2e- → H2 on nickel at 25oC to determine what current density would be needed to obtain an overpotential of 0.20 V as calculated from
Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient for the reaction: 2 H+ + 2e- → H2 on nickel at 25oC to determine what current density would be needed to obtain an overpotential of 0.20 V as calculated from
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient
for the reaction:
2 H+ + 2e- → H2
on nickel at 25oC to determine what current density would be needed to obtain an overpotential
of 0.20 V as calculated from:
(a) the Butler-Volmer equation
(b) the Tafel equation.
Is the validity of the Tafel approximation affected at overpotentials of 0.4 V and more?
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