A polydopamine derivative monolayer on gold electrode for electrochemical catalysis of H2O2

Here, polydopamine derivative monolayer was generated by electro-polymerization of thiol dopamine derivatives modified on gold electrode, and the adhesion of polydopamine made it being a platform for secondary reaction. The influence of pH on formation of polydopamine derivative was investigated. Horseradish peroxidase (HRP) was adhered on the polydopamine derivative monolayer electrode catalyzing the oxidation of H 2 O 2 . Cyclic voltammetry (CV) was used to detect the polydopamine monolayer as well as electrochemical catalysis of H 2 O 2 . Besides, electrochemical impedance spectroscopy (EIS) and atomic force microscope (AFM) were also employed to characterize the polymeric monolayer.