Abstract
The characteristic shape of periodic potentiostatic current/potential curves in 1 N HClO4 with different amounts of HCOOH is discussed on the basis of the previous adsorption measurements and of theoretical considerations. The experimental results can be satisfactorily interpreted by a generalized dehydration mechanism under consideration of the specific heterogeneity of the platinum surface. A concept is proposed which explains the appearance of three oxidation waves during the anodic sweep at bulk concentrations larger than 10−3 M and the appearance of only two waves at concentrations smaller than 10−3 M.
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