Electrochemical and Optical Investigation of Conductive Polymer and MWCNT Nanocomposite Film

In the present study, in order to achieve an inexpensive tolerable anode catalyst for direct electrooxidation of methanol, poly tyramine nanoparticles and NiO, identified by PTy-NiO, were prepared by in situ electropolymerization of tyramine in the presence of an anionic surfactant under ultrasonic irradiation. Ni(II) ions are incorporated into the electrode by immersion of the polymeric modified electrode containing amine groups in a Ni(II) ion solution and a PTy-NiO composite film is formed in the alkaline medium on the surface of the electrode. The surface morphology of the film is studied by surface microscopy techniques. The presence of nickel in the films is confirmed by energy dispersive spectroscopy (EDS) analysis. Molecular modeling calculations are carried out for polymer-Ni with density functional theory (DFT) using a 6-31G(d,p) basis set and Gaussian 03 program package. Furthermore, the experimental absorbance spectra of PTy-NiO are compared with the results obtained from Maxwell Garnett theory (MGT) and the value of energy E g ¼ 3.75 eV of the composite obtained. Modified graphite electrodes (G/PTy-NiO and G/PTy-SDS-NiO) are examined for their redox processes and electrocatalytic activities towards the oxidation of methanol in alkaline solutions. Compared with G/PTy-NiO, the G/PTy-SDS-NiO electrode shows a higher catalytic performance in the electrocatalytic oxidation of methanol. A kinetic model was developed and the kinetic parameters were calculated using the methanol concentration dependency of charge transfer resistance derived from the impedance studies. www.rsc.org/advances 30394 | RSC Adv., 2015, 5, 30394-30404 This journal is

show abstract

“…[46][47][48][49][50][51][52][53][54][55] Fig. It has been broadly discussed in the literature using a variety of theoretical models.…”

Section: Resultsmentioning

confidence: 99%

Physioelectrochemical and DFT investigation of metal oxide/p-type conductive polymer nanoparticles as an efficient catalyst for the electrocatalytic oxidation of methanol

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Conductive polymers on the electrode surface with good uniformity can be prepared by electropolymerization procedure [23]. Conductive polymers are another of the most commonly used materials as a modifier because of easy synthesis, high conductivity, stable surface and low price of monomers.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

2018

View full text Add to dashboard Cite

In this study, the multiwalled carbon nanotube‐poly (aniline) (MWCNT‐PANI) composite is successfully deposited on the glassy carbon electrode (GCE) by electropolymerization as an efficient and conventional route. The structural and chemical properties of the MWCNT‐PANI was investigated by various spectroscopic and analytical techniques, scanning electron microscopy (SEM), X‐Ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). After that, the electrochemical oxidation behavior of serotonin (5‐HT) in phosphate buffer solution (pH 7.4) was examined using cyclic voltammetry (CV). Besides, the MWCNT‐PANI/GCE used for the detection of 5‐HT with linear concentration range (1.0×10−7–1.2×10−5 mol L−1), low limit of detection (3.3×10−8 mol L−1) under differential pulse voltammetric (DPV) conditions. The proposed electrochemical sensor based on MWCNT‐PANI is both time and cost effective, has good reproducibility, high selectivity as well as stability for 5‐HT determination. The developed composite electrode was used to detect 5‐HT in synthetic urine sample and satisfactory results were obtained with high recoveries.

show abstract

“…6. To obtain a satisfactory impedance simulation of methanol electro-oxidation, it is necessary to replace the capacitor C with a constant phase element (CPE) in the equivalent circuit [34][35][36][37][38][39][40][41][42][43][44][45][46]. The most widely accepted explanation for the presence of CPE behavior and depressed semicircles on solid electrodes is microscopic roughness, causing an inhomogeneous distribution in the solution resistance as well as in the double-layer capacitance.…”

Section: Resultsmentioning

confidence: 99%

Physioelectrochemical Investigation of Electrocatalytic Oxidation of Saccharose on Conductive Polymer Modified Graphite Electrode

Naeemy

Ehsani

Jafarian

et al. 2015

Journal of Electrochemical Science and Technology

View full text Add to dashboard Cite

In this study we investigated the electrocatalytic oxidation of saccharose on conductive polymer-Nickel oxide modified graphite electrodes based on the ability of anionic surfactants to form micelles in aqueous media. This NiO modified electrode showed higher electrocatalytic activity than Ni rode electrode in electrocatalytic oxidation of saccharose. The anodic peak currents show linear dependency with the square root of scan rate. This behavior is the characteristic of a diffusion controlled process. Under the CA regime the reaction followed a Cottrellian behavior and the diffusion coefficient of saccharose was found in agreement with the values obtained from CV measurements.

show abstract

Electrochemical and Optical Investigation of Conductive Polymer and MWCNT Nanocomposite Film

Cited by 14 publications

References 1 publication

Physioelectrochemical and DFT investigation of metal oxide/p-type conductive polymer nanoparticles as an efficient catalyst for the electrocatalytic oxidation of methanol

Physioelectrochemical and DFT investigation of metal oxide/p-type conductive polymer nanoparticles as an efficient catalyst for the electrocatalytic oxidation of methanol

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

Physioelectrochemical Investigation of Electrocatalytic Oxidation of Saccharose on Conductive Polymer Modified Graphite Electrode

Contact Info

Product

Resources

About