Electrocatalytic Properties of Electrodes which are Functionalized with Composite Films of f-MWCNTs Incorporated with Poly(neutral red)

A conductive composite film which is composed of functionalized multiwalled carbon nanotubes with poly(neutral red) (PNR) has been synthesized using the potentiostatic method. It is produced on glassy carbon, gold and transparent semiconductor tin oxide electrodes for electrocatalysis, electrochemical quartz crystal microbalance (EQCM), and scanning electron microscopy (SEM) studies. The incorporation of PNR on the is revealed by the EQCM technique and their morphology has been studied using the SEM method. The composite film exhibits a promising electrocatalytic activity toward biochemical compounds (in pH 6.0), halogen oxyanions (pH 1.0), and sulfur oxoanions (pH 6.0). Among these, the biochemical compounds which have been studied are (−)-epigallocatechin gallate, nicotinamide adenine dinucleotide, epinephrine, and serotonin. The sulfur oxoanions are , , , and . The presence of amplifies the electrocatalytic peak current and the film background current. The results confirm also that the enhance electrocatalytic oxidation and PNR enhances reduction. Further, the halogen oxyanions electrocatalytic reduction potential for , and no peak for clearly reveal that the activity is dependent on its electronegativity, which is one of the basic science properties.