Electropolymerization of <i>o</i>‐phenylenediamine on Pt‐electrode from aqueous acidic solution: Kinetic, mechanism, electrochemical studies and characterization of the polymer obtained

Sayyah, S. M.; El-Deeb, M. M.; Kamal, S. M.; Azooz, R. E.

doi:10.1002/app.29802

Cited by 47 publications

(31 citation statements)

References 51 publications

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“…The current density decrease was slower in the case of electropolymerization at pH 1 than in the case of electropolymerization at pH 7. When electropolymerization was conducted by potential cycling (voltammograms not shown here), we observed the same effect of pH, in agreement with results reported in the literature [29][30][31].…”

Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 91%

Surface-modified reusable gold electrode for detection of dissolved oxygen

et al. 2012

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The behavior of gold electrodes for the detection of dissolved oxygen was studied by the method of cyclic voltammetry in a phosphate-buffered solution with physiological pH. Surface modification with electropolymerized poly (o-phenylenediamine) film was performed to improve electrode antifouling properties. The voltammetric signature of oxygen was considered in terms of film electropolymerization conditions and post-deposition conditioning of the electrodes. The changes in the chemical structure of the poly (o-phenylenediamine) films as a result of these factors were confirmed by X-ray photoelectron spectroscopy analysis. Following long post-deposition conditioning in a phosphate-buffered solution, the modified electrodes exhibited stable voltammetric signatures in repeated tests and during storage as well as in the presence of a dense population of Escherichia coli (characterized by negligible metabolic activity) in the buffer. The results are indicative of the improved electrode antifouling properties.

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Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 91%

Surface-modified reusable gold electrode for detection of dissolved oxygen

et al. 2012

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“…The singlet signal appearing at δ = 4.07 ppm is attributed to NH proton attached to the benzene ring, whereas the signal at δ = 8.19 ppm is due to water of crystallization. 49 The …”

Section: H Nmr Spectroscopymentioning

confidence: 99%

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

2016

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ABSTRACT:The electrochemical anodic electropolymerization of m-toluidin on a Pt electrode from a deoxygenated aqueous acid medium is carried out using the cyclic voltammetry technique. The effects of different parameters on the electrochemical polymerization such as the monomer, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature are investigated using a conventional three-electrode cell. The results show the presence of an oxidation peak (anodic current peak) at approximately +1110 mV vs. saturated calomel electrode in all cases of the investigated parameters. A gradual increase in the anodic current peak density (I p ) is observed with a repeating number of cycles accompanied with the appearance of a new peak at low positive potential from the second repeating cycle. In addition, the effects of m-toluidin, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature values have the same behavior on I p values, in which there is an increase in I p values till certain values (different for each parameter) and then decrease. The experimentally obtained kinetic equation is deduced from values of I p , and a simplified mechanism for the electrochemical anodic polymerization of m-toluidin is proposed. Moreover, the diffusion coefficient, activation energy (E a ), and thermokinetic parameters such as entropy ( S*), enthalpy of reaction ( H*), and free energy change ( G*) are calculated. The prepared polymer is characterized by elemental analysis, UV-visible, IR, 1 H NMR, X-ray diffraction, SEM, and TGA. C

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“…The X‐ray diffraction pattern shows that the prepared P( o PD) is amorphous material,35 while P(2ABT) is crystalline, where there are two peaks at 2θ angle equal to 18.88 and 21.26, and P( o PD‐co‐2ABT) is crystalline where there is a peak at 2θ angle equal to 21.18. The surface morphology of the polymer obtained at the optimum conditions was examined by scanning electron microscopy.…”

Section: Resultsmentioning

confidence: 99%

Electropolymerization kinetics of a binary mixture of o‐phenylenediamine and 2‐aminobenzothiazole and characterization of the obtained polymer films

Sayyah

El‐Rehim

Kamal

et al. 2010

J of Applied Polymer Sci

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Poly(o-phenylenediamine-co-2-aminobenzothiazole), P(oPD-co-2ABT), has been synthesized electrochemically from an aqueous acid medium. The initial rate of electrocopolymerization reaction on platinum electrode is small, and the rate law is Rate2.08 . The apparent activation energy (E a ) is found to be 57.44 kJ mol À1 . The polymer films obtained have been characterized by cyclic voltammetry, X-ray diffraction, elemental analysis, TGA, scanning electron microscopy, and IR-spectroscopy. The mechanism of the electrochemical polymerization reaction has been discussed. The monomer reactivity ratios (r 1 and r 2 ) were calculated using Fineman-Rö ss method.

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Electropolymerization of o‐phenylenediamine on Pt‐electrode from aqueous acidic solution: Kinetic, mechanism, electrochemical studies and characterization of the polymer obtained

Cited by 47 publications

References 51 publications

Surface-modified reusable gold electrode for detection of dissolved oxygen

Surface-modified reusable gold electrode for detection of dissolved oxygen

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

Electropolymerization kinetics of a binary mixture of o‐phenylenediamine and 2‐aminobenzothiazole and characterization of the obtained polymer films

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