Question

Given the following data for the electrochemical reaction A + B → C, where A and B are electrons:- The anodic Tafel slope is 50 mV per decade of current density.- The cathodic Tafel slope is 70 mV per decade of current density.Calculate the exchange current density (i0) for the reaction.

Answer 1

To calculate the exchange current density  i0  for the reaction, we need to know the overpotential    and the current density  i  at a specific point on the Tafel plot. Unfortunately, the given information is not sufficient to directly calculate the exchange current density.However, we can provide a general approach to calculate the exchange current density if additional information is given.The Tafel equation for the anodic and cathodic reactions can be written as:_anodic = ba * log i / i0 _cathodic = -bc * log i / i0 where _anodic and _cathodic are the anodic and cathodic overpotentials, ba and bc are the anodic and cathodic Tafel slopes, i is the current density, and i0 is the exchange current density.If we know the overpotential and current density at a specific point, we can use either the anodic or cathodic Tafel equation to solve for i0:i0 = i / 10^ / ba   for the anodic reactioni0 = i / 10^ / -bc   for the cathodic reactionPlease provide the overpotential and current density at a specific point on the Tafel plot, and we can calculate the exchange current density for the reaction.