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Abstract
The effect of an adsorbed anionic surfactant sodium dodecyl benzene sulfonate (SDBS) on electron transfer (ET) reaction between ferricyanide aqueous solution and decamethylferrocene (DMFc) located on the adjacent organic phase was investigated for the first time by thin layer method. The adsorption of SDBS at the interface resulted in a decay in the cathodic plateau current of bimolecular reaction with increasing concentrations of SDBS in aqueous phase. However, the rate constant of electron transfer ( k et) increased monotonically as the SDBS concentrations increased from 0 to 200 μmol/L. The experimental results showed that SDBS formed patches on the interface and influenced the structure of electrical double layer.
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