In Tafel polarisation curves, some authors differentiate the lines as activation controlled or diffusion controlled, what do they mean? Also, please suggest some articles that gives a clear idea of the Tafel lines.
The difference between Chemistry and Electrochemistry is that in EC reaction the electrode potential determines the rate of the reaction - this process depends on the arrival and supply of electro active species to the electrode - If you have near the interface , electrochemically active species is plenty then the reaction rate is determined by the Electrode potential - this is called activation controlled
if the arrival of the species is slow - the reaction rate is limited by the arrival of the species - Now the rate of the reaction is controlled by diffusion -- this is diffusion controlled
The Tafel curve represents activation (charge-transfer) controlled process in accordance with the theory of this method. Let me reccomend some classical textbook of Soviet electrochemists:
Theoretical electrochemistry. by L I Antropov. Book. English. 1977. Moscow : Mir.
B. B. Damaskin, O. A. Petrii, Introduction to Electrochemical Kinetics, Moscow, Vysshaya shkola, 1975, 400 p.; 2nd Edition: (1983)
The modern textbooks can be used as well.
The difference between Chemistry and Electrochemistry is that in EC reaction the electrode potential determines the rate of the reaction - this process depends on the arrival and supply of electro active species to the electrode - If you have near the interface , electrochemically active species is plenty then the reaction rate is determined by the Electrode potential - this is called activation controlled
if the arrival of the species is slow - the reaction rate is limited by the arrival of the species - Now the rate of the reaction is controlled by diffusion -- this is diffusion controlled
thank you all for your wonderful answers.. especially Dr.Muralidharan sir...your ppt was really useful...and now am clear with my doubt.
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