Abstract
The electrooxidation of acetylsalicylic acid (ASA) has been investigated at a platinum electrode in aqueous solutions. The process of oxidation and its kinetics has been investigated using cyclic and differential pulse voltammetry. The rate constant, electron transfer coefficient and diffusion coefficients were determined for ASA electrochemical oxidation. The ASA electrooxidation involves an irreversible transfer of one electron and two protons in the first step in solutions with pH up to 8, in agreement with the one step one-electron mechanism. If solution pH is higher than 8, then one electron without protons is involved in the electrooxidation. The process is diffusion controlled in the whole pH range studied.
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