Abstract
AbstractA paste electrochemical sensor, based on a carbon paste electrode modified with different oxides, has been developed for investigation of 2,4‐dimethylphenol (2,4 DMP) oxidation in phosphate buffer solution (PBS) with pH of 7. In this study, Fe2O3, Al2O3, ZrO2 and SiO2 have been tested. Among these oxides, Al2O3 showed the best electrocatalysis on oxidation of 2,4 DMP at ratio of graphite powder/Al2O3/paraffin oil = 71/4/25. The high sensibility of Al2O3 for 2,4 DMP detection can be explained by the interaction between benzene rings of phenol and acid sites of Al2O3. From this result it opens a high potential application of sensors based on the electro acidic catalysts.
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