Overpotential for Anodic Reaction from Tafel Equation Solution

STEP 0: Pre-Calculation Summary
Formula Used
Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density))
η = +(A)*(log10(i/i0))
This formula uses 1 Functions, 4 Variables
Functions Used
log10 - Common logarithm function (base 10), log10(Number)
Variables Used
Overpotential - (Measured in Volt) - The Overpotential is the potential difference between a half-reaction's thermodynamically determined reduction potential and the potential at which the redox event is experimentally observed.
Tafel Slope - (Measured in Volt) - The Tafel slope describes how the electrical current through an electrode depends on the voltage difference between the electrode and the bulk electrolyte. The Tafel slope is measured experimentally.
Electric Current Density - (Measured in Ampere per Meter²) - The Electric current density is the amount of charge per unit of time that flows through the unit area of a chosen cross-section.
Exchange Current Density - (Measured in Ampere per Meter²) - The Exchange Current Density is defined as the current in the absence of net electrolysis and at zero overpotential.
STEP 1: Convert Input(s) to Base Unit
Tafel Slope: 2 Volt --> 2 Volt No Conversion Required
Electric Current Density: 10 Ampere per Meter² --> 10 Ampere per Meter² No Conversion Required
Exchange Current Density: 0.2 Ampere per Meter² --> 0.2 Ampere per Meter² No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
η = +(A)*(log10(i/i0)) --> +(2)*(log10(10/0.2))
Evaluating ... ...
η = 3.39794000867204
STEP 3: Convert Result to Output's Unit
3.39794000867204 Volt --> No Conversion Required
FINAL ANSWER
3.39794000867204 Volt <-- Overpotential
(Calculation completed in 00.031 seconds)

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Created by Prashant Singh
K J Somaiya College of science (K J Somaiya), Mumbai
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Overpotential for Anodic Reaction from Tafel Equation
Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density)) Go
Tafel Slope for Cathodic Reaction from Tafel Equation
Tafel Slope = -Overpotential/(log10(Electric Current Density/Exchange Current Density)) Go
Tafel Slope for Anodic Reaction from Tafel Equation
Tafel Slope = +Overpotential/(log10(Electric Current Density/Exchange Current Density)) Go
Exchange Current Density for Cathodic Reaction from Tafel Equation
Exchange Current Density = Electric Current Density/(10^(Overpotential/-Tafel Slope)) Go
Exchange Current Density for Anodic Reaction from Tafel Equation
Exchange Current Density = Electric Current Density/(10^(Overpotential/+Tafel Slope)) Go
Current Density for Cathodic Reaction from Tafel Equation
Electric Current Density = (10^(Overpotential/-Tafel Slope))*Exchange Current Density Go
Current Density for Anodic Reaction from Tafel Equation
Electric Current Density = (10^(Overpotential/+Tafel Slope))*Exchange Current Density Go

Overpotential for Anodic Reaction from Tafel Equation Formula

Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density))
η = +(A)*(log10(i/i0))

What is Tafel equation?

The Tafel equation is an equation in electrochemical kinetics relating the rate of an electrochemical reaction to the overpotential. The Tafel equation was first deduced experimentally and was later shown to have a theoretical justification. The equation is named after Swiss chemist Julius Tafel.
" It describes how the electrical current through an electrode depends on the voltage difference between the electrode and the bulk electrolyte for a simple, unimolecular redox reaction ".

How to Calculate Overpotential for Anodic Reaction from Tafel Equation?

Overpotential for Anodic Reaction from Tafel Equation calculator uses Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density)) to calculate the Overpotential, The Overpotential for anodic reaction from Tafel equation formula is defined as the product of positive Tafel slope to the logarithm of current density per exchange current density. Overpotential is denoted by η symbol.

How to calculate Overpotential for Anodic Reaction from Tafel Equation using this online calculator? To use this online calculator for Overpotential for Anodic Reaction from Tafel Equation, enter Tafel Slope (A), Electric Current Density (i) & Exchange Current Density (i0) and hit the calculate button. Here is how the Overpotential for Anodic Reaction from Tafel Equation calculation can be explained with given input values -> 3.39794 = +(2)*(log10(10/0.2)).

FAQ

What is Overpotential for Anodic Reaction from Tafel Equation?
The Overpotential for anodic reaction from Tafel equation formula is defined as the product of positive Tafel slope to the logarithm of current density per exchange current density and is represented as η = +(A)*(log10(i/i0)) or Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density)). The Tafel slope describes how the electrical current through an electrode depends on the voltage difference between the electrode and the bulk electrolyte. The Tafel slope is measured experimentally, The Electric current density is the amount of charge per unit of time that flows through the unit area of a chosen cross-section & The Exchange Current Density is defined as the current in the absence of net electrolysis and at zero overpotential.
How to calculate Overpotential for Anodic Reaction from Tafel Equation?
The Overpotential for anodic reaction from Tafel equation formula is defined as the product of positive Tafel slope to the logarithm of current density per exchange current density is calculated using Overpotential = +(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density)). To calculate Overpotential for Anodic Reaction from Tafel Equation, you need Tafel Slope (A), Electric Current Density (i) & Exchange Current Density (i0). With our tool, you need to enter the respective value for Tafel Slope, Electric Current Density & Exchange Current Density and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Overpotential?
In this formula, Overpotential uses Tafel Slope, Electric Current Density & Exchange Current Density. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Overpotential = -(Tafel Slope)*(log10(Electric Current Density/Exchange Current Density))
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