Abstract
The electrocatalytic oxidation of d-sorbitol on a polycrystalline platinum electrode, in perchloric aqueous medium, was studied by cyclic voltammetry under varying sweep rate, potential limits, stirring, temperature, pH and concentration of d-sorbitol. A value of about 50 kJ mol −1 was obtained for the apparent activation enthalpy of the oxidation reaction at 0.1 V vs. sme. The experimental rate equation is i = kC d-sorb 0.4C H + −0.3.exp[ 0.4 FE RT ] , valid for [ d- sorbitol] < 0.1 mol dm −3 and pH < 1.
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