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Life of the Tafel equation: Current understanding and prospects for the second century

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
52
Issue
11
Identifiers
DOI: 10.1016/j.electacta.2006.10.014
Keywords
  • Heterogeneous Electron And Proton Transfer
  • Intramolecular Reorganization
  • Solvent Dynamics
  • Hydronium Ion
  • Transfer Coefficient
Disciplines
  • Philosophy
  • Physics

Abstract

Abstract The life of Tafel equation is considered briefly as evolution in the understanding of Tafel's empiric parameters in the framework of various phenomenological and theoretical approaches. Modern theories of the interfacial charge transfer reactions are employed to explain the behavior of transfer coefficient versus electrode overvoltage and deviations of this quantity from 0.5 at low overvoltage. The effects of intramolecular reorganization, orbital overlap, reactant quantum modes and solvent dynamics are addressed and illustrated by model calculations. An attempt is made to propose new explanations of some data reported in the literature.

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