Electrocatalytic properties of electrodes which are functionalized with composite films of f-MWCNTs incorporated with poly(neutral red)

@article{citeulike:2482064, abstract = {A conductive composite film which is composed of functionalized multiwalled carbon nanotubes (f-MWCNTs) 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 f-MWCNTs 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 S2 O4 2-, S O3 2-, S2 O8 2-, and S O5 2-. The presence of f-MWCNTs amplifies the electrocatalytic peak current and the film background current. The results confirm also that the f-MWCNTs enhance electrocatalytic oxidation and PNR enhances reduction. Further, the halogen oxyanions electrocatalytic reduction potential E pc for I O3- =-0.25 V, Br O3- =-0.5 V and no peak for Cl O3- clearly reveal that the activity is dependent on its electronegativity, which is one of the basic science properties. {\copyright} 2007 The Electrochemical Society.}, address = {Electrochemical Society}, author = {Yogeswaran, U. and Chen, S. M. }, citeulike-article-id = {2482064}, doi = {10.1149/1.2778293}, journal = {J Electrochem Soc}, keywords = {carbon, composite, electrodes, epigallocatechin, film, functionalized, gallate, halogen, modified, multiwall, nadh, nanotubes, neurotransmitters, oxoanions, oxyanions, sulfur}, number = {11}, posted-at = {2008-03-07 06:22:09}, priority = {5}, title = {Electrocatalytic properties of electrodes which are functionalized with composite films of f-MWCNTs incorporated with poly(neutral red)}, url = {http://dx.doi.org/10.1149/1.2778293}, volume = {154}, year = {2007} }

TY - JOUR ID - citeulike:2482064 L3 - citeulike-article-id:2482064 TI - Electrocatalytic properties of electrodes which are functionalized with composite films of f-MWCNTs incorporated with poly(neutral red) JF - J Electrochem Soc VL - 154 IS - 11 AD - Electrochemical Society N2 - A conductive composite film which is composed of functionalized multiwalled carbon nanotubes (f-MWCNTs) 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 f-MWCNTs 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 S2 O4 2-, S O3 2-, S2 O8 2-, and S O5 2-. The presence of f-MWCNTs amplifies the electrocatalytic peak current and the film background current. The results confirm also that the f-MWCNTs enhance electrocatalytic oxidation and PNR enhances reduction. Further, the halogen oxyanions electrocatalytic reduction potential E pc for I O3- =-0.25 V, Br O3- =-0.5 V and no peak for Cl O3- clearly reveal that the activity is dependent on its electronegativity, which is one of the basic science properties. © 2007 The Electrochemical Society. KW - carbon KW - composite KW - electrodes KW - epigallocatechin KW - film KW - functionalized KW - gallate KW - halogen KW - modified KW - multiwall KW - nadh KW - nanotubes KW - neurotransmitters KW - oxoanions KW - oxyanions KW - sulfur AU - Yogeswaran, U AU - Chen, SM PY - 2007/// UR - http://dx.doi.org/10.1149/1.2778293 ER -