Chapter 19, Problem 19D.5P

Interpretation Introduction

Interpretation:

From the given data, the exchange-current density and transfer coefficient have to be calculated.

Concept Introduction:

Tafel plots:

When the overpotential is large and positive, the anodic process is dominant.  The current density is given by

    $\text{j}\text{=}{\text{j}}_{\text{0}}{\text{e}}^{\text{(1-α)}}{}^{\text{fη}}\text{hence}\text{ln}\text{j}\text{=}\text{ln}{\text{j}}_{\text{0}}\text{+}\text{(1-}\text{α}\text{)fη}$

A plot of the logarithm of the current density against the overpotential is called a Tafel plot.