Electrocatalytic properties of the ion beam irradiated conducting polypyrrole

Radhakrishnan, S.; Adhikari, Arindam; Awasthi, D.K.

doi:10.1016/s0009-2614(01)00547-4

Cited by 15 publications

(10 citation statements)

References 22 publications

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“…The results obtained by Wessling and Posdorfer suggest that corrosion protection occurs via formation of passivating layer, which PANI acts as an electronic and chemical diffusion barrier in preventing corrosion rather than merely playing the role as a physical barrier. Radhakrishnan et al believed that self‐healing effect was associated with the scavenging of ions by PANI, which prevented corrosion of the underlying substrate.…”

Section: Resultsmentioning

confidence: 99%

Investigation on anticorrosion performance of polyaniline‐mesoporous MCM‐41 composites in new water‐based epoxy coating

Wang

Cheng

et al. 2014

Materials & Corrosion

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Mesoporous MCM‐41(M(with template)) whose pore channels were filled with cationic surfactant n‐hexadecyltrimethyl‐ammonium bromide (CTAB) and a (hydrophobic) poly(propylene glycol) nucleus terminated by two primary hydroxyl groups (Pluronic F‐127, molecular weight = 11500) inside the pore channels and on the outer surface of the particle, MCM‐41 (M(without template)) whose mixture template inside the pore channels and on the outer surface of the particle were calcinated, were used as new fillers for waterborne epoxy. The corrosion studies were carried out on steel plates coated with formulations containing polyaniline prepared with M(with template) and M(without template). Correspondingly, corrosion performance of the coatings was studied by electrochemical impedance spectroscopy (EIS) in 3.5% NaCl aqueous solution and salt spray test. Coatings prepared from polyaniline (PANI)/M(without template) particles synthesized by in situ polymerization were found to exhibit excellent corrosion resistance much superior to PANI/M(with template) in aggressive environments due to the different interfacial structures between the fillers and the matrix.

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Section: Resultsmentioning

confidence: 99%

Investigation on anticorrosion performance of polyaniline‐mesoporous MCM‐41 composites in new water‐based epoxy coating

Wang

Cheng

et al. 2014

Materials & Corrosion

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“…In one of our previous studies of nitrobenzene electrocatalytic reduction with different metal halide dopants, it was proven that NiCl 2 ‐doped PPy was catalytically more active compared to the different dopants investigated, and hence, in this investigation, NiCl 2 was chosen as the dopant for the different experiments 29. A dopant concentration of 6 m M was chosen to dope the PPy films, as previous investigations showed that this dopant concentration gave the highest catalytic activity for the reactants 10, 11, 29. These films were employed to check the electrocatalytic activity of the PPy films, and the electrocatalytic reduction of nitrobenzene for different concentrations of the reactant.…”

Section: Methodsmentioning

confidence: 99%

“…We reported previously that conducting PPy films modified by doping with PdCl 2 showed catalytic activity toward methanol electrooxidation and that the catalytic activity increased several times when these films were modified by ion‐beam irradiation 10. The better catalytic activity in the case of irradiated film samples was explained on the basis of better complexation between Pd and nitrogen atoms of the PPy chain.…”

Section: Introductionmentioning

confidence: 98%

“…Conducting polymers, such as polypyrrole (PPy), polyaniline, and polythiophene, can be used as catalysts because of their ion and electron conductivity, and these materials show excellent reversible redox behavior. In general, conducting polymers have been studied extensively in recent decades for various applications, including light‐emitting diodes,1, 2 electromagnetic interference shielding and electrostatic charge dissipation,3 sensors and actuators,4–6 energy conversion systems,7, 8 catalysts,9–11 and corrosion protection 12, 13. The advantage of using conducting polymers is that the electrical properties of these materials can be reversibly controlled; this is because of their reversible redox properties, easy interfacing with electronic device, flexibility, long life, high stability, and environmental friendliness.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the surface roughness of conducting polypyrrole thin‐film electrodes on the electrocatalytic reduction of nitrobenzene

Adhikari

Radhakrishnan

Vijayan

2012

J of Applied Polymer Sci

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Conducting polypyrrole (PPy) thin‐film electrodes were prepared by the electropolymerization of pyrrole on gold‐coated glass plates. Films of various roughnesses were obtained by the variation of the scan rates during electropolymerization. These thin films were modified by doping with 6mM of the dopant NiCl2. The surface morphology of the films was studied by scanning electron microscopy and atomic force microscopy (AFM), which suggested films prepared with a high scan rate were rougher in nature than the films produced with a low scan rate. The electrocatalytic reduction of nitrobenzene was carried out with these electrodes with the cyclic voltammetry technique in acetonitrile containing 0.1M HClO4 as a supporting electrolyte. The various results obtained show that the conducting PPy thin‐film electrodes were catalytically active toward the electroreduction process. The modified PPy film electrodes doped with NiCl2 were more active toward nitrobenzene electroreduction than the PPy film alone. The results indicate that the roughness of the films played a very important role in determining their catalytic activity. The PPy films that were more rough in nature were catalytically more active than the smooth films; this may have been due to the availability of more reactive sites in the case of rough films. The apparent diffusion coefficients of the PPy film electrodes were also calculated. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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“…Moreover, the possibility of dispersing metallic particles inside the polymers gives electrodes with higher surface areas, enhanced electrocatalytic activities and facilitates electron transfer due to semi conducting properties [24][25][26][27][28] and change in fermi level toward the oxidation of organic molecules [29]. Organic-inorganic composite have attracted considerable attention as they can combine the advantages of both components and may offer special through reinforcing or modifying each other [30].…”

Section: +mentioning

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

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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.

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Electrocatalytic properties of the ion beam irradiated conducting polypyrrole

Cited by 15 publications

References 22 publications

Investigation on anticorrosion performance of polyaniline‐mesoporous MCM‐41 composites in new water‐based epoxy coating

Investigation on anticorrosion performance of polyaniline‐mesoporous MCM‐41 composites in new water‐based epoxy coating

Effect of the surface roughness of conducting polypyrrole thin‐film electrodes on the electrocatalytic reduction of nitrobenzene

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

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