Anomalous Temperature Dependence of the Tafel Slope

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Abstract
The anomalous temperature dependence of the Tafel slope is discussed. Experimental evidence is sparse and in part unreliable, but it can be said with confidence that the classical relationship: is not confirmed experimentally and appears to be the exception rather than the rule. It is shown that, contrary to common belief, an assumed potential dependence of the entropy of activation cannot give rise to the anomalous temperature dependence of the Tafel slope. The importance of the anomalous temperature dependence of to the understanding of the theory of the elementary charge transfer process is emphasized. The types of experiments needed to determine the way in which the Tafel slope changes with temperature in different systems (the knowledge of which is essential for proper comparison with theory) are discussed.

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