Carbon Black‐Modified Screen‐Printed Electrodes as Electroanalytical Tools

Abstract

Abstract In this paper screen‐printed electrodes (SPEs) bulk modified with carbon black (CB) or with CB dispersion in DMF:water were developed and characterized. We have demonstrated by cyclic voltammetry, SEM and electrochemical impedance spectroscopy that an increase of CB amount on the working electrode surface increases the electrochemical performances of CB‐SPE. The CB‐SPE was tested with ferricyanide, epinephrine, benzoquinone and H 2 O 2 demonstrating in any case an enhancement of electrochemical activity. For H 2 O 2 amperometric detection, a sensitivity of 241.4±5.7 mA M −1 cm −2 and 1.46±0.06 mA M −1 cm −2 was obtained, respectively, for CB‐SPE and bare SPE.