A Co-ZnO electrode sensor is prepared on the surface of ITO conductive glass by a distributed electrodeposition method,and used for the analysis and detection of catechol.The surface morphology,elemental composition and crystal structure of the prepared Co-ZnO electrodes are analyzed by means of SEM,EDS and XRD.Their electrochemical property is analyzed through using cyclic voltammetry and chronoamperometry.The results show that the Co-ZnO electrode has very obvious electrocatalytic activity on catechol.The linear detection range of catechol by Co-ZnO electrode is 0.01-10 mmol·L-1,the sensitivity is 1,429.67 mA·mM-1·cm-2,and the detection limit is 0.87 µmol·L-1.It is found through interference test that Co-ZnO electrodes have good selectivity and reproducibility.
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