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Essential Shortcomings of Tafel Equations in Describing Electrochemical Dissolution Kinetics of a Solid Electrode Yu. V. Alekseeva, G. Yu. Alekseevb, V. A. Bityurinb, and A. V. Plaskeeva aKarpov Institute of Physical Chemistry, ul. Vorontsovo Pole 10, Moscow, 103064 Russia b Institute of High Temperatures, Russian Academy of Sciences, Moscow, Russia E-mail:
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Received April 6, 2005 Abstract — A simplified topokinetic dissolution model of a solid taking into account the correlation between the dissolution rate and the atomic surface topography enables one to interpret a linear (in semilogarithmic coordinates) segment of the steady-state curves of the active anodic dissolution of metals. Its slope corresponds to the product of a concentration of kinks and the elementary reaction rate, both of which exponentially depend on the potential, rather than a simple (Tafel) elementary rate of the atom dissolution at a semi-crystal kink. PACS numbers: 82.45.In, 82.45.Qr DOI: 10.1134/S0033173206060026
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