Mechanism of formation of polypyrrole on a Pt electrode from aqueous solutions

Marcos, María Luisa Fernández; Rodríguez, I.; González‐Velasco, J.

doi:10.1016/0013-4686(87)85085-5

Cited by 64 publications

(17 citation statements)

References 6 publications

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“…Marcos et al . observed similar behavior for the formation of polypyrrole on a platinum electrode. They explained increased Tafel slopes in terms of formation of a polymer layer that underwent oxidation in the second cycle.…”

Section: Resultssupporting

confidence: 66%

Influence of HDTMA/Bentonite Ratio on Phenol Electrooxidation

Mojović

Jović-Jovičić

Milutinović-Nikolić

et al. 2012

Env Prog and Sustain Energy

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In this article partial and complete substitution of cations in the interlayer region of clay with different amounts of hexadecyl trimethylammonium bromide (HDTMABr) was performed. The aim was to investigate the influence of HDTMA/bentonite ratio on phenol electrooxidation. Multisweep cyclic voltammetry was applied to analyze the behavior of clay modified glassy carbon electrode. The influence of phenol concentration was investigated. HDTMA/clay ratio plays key role in phenol oxidation on these electrodes. There is definite amount of surfactant that should be present in bentonite sample in order to achieve good current response and prolonged life of the electrode. The reaction order in respect to phenol was determined to be around 2. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 1124–1128, 2013

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Section: Resultssupporting

confidence: 66%

Influence of HDTMA/Bentonite Ratio on Phenol Electrooxidation

Mojović

Jović-Jovičić

Milutinović-Nikolić

et al. 2012

Env Prog and Sustain Energy

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“…1b, a high initial potential is necessary in order to oxidize monomers into oligomers. Afterwards the constant potential reached is high enough for complete polymerization [8,20]. Furthermore, Fig.…”

Section: Methodsmentioning

confidence: 99%

“…1a), which corresponds to the oxidation of pyrrole (Py) monomers into radical cations and the consequent formation of PPy film onto the carbon cloth electrode. The most characteristic feature of this CV mode of PPy deposition is the pause in the deposition between each CV cycle leading to a discontinuous growth and potential sweep of the growing film which is expected to produce uniform PPy microstructures [8,20]. From the CV mode, we have determined the optimal deposition potential (0.8 V, Ag/AgCl) and current density (10 mA/cm 2 ) for PPy formation which will be further used in PS and GS modes, respectively.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical supercapacitive properties of polypyrrole thin films: influence of the electropolymerization methods

Wolfart

Dubal

Vidotti

et al. 2015

J Solid State Electrochem

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A detailed study of the effects of different electropolymerization methods on the supercapacitive properties of polypyrrole (PPy) thin films deposited on carbon cloth is reported. Deposition mechanisms of PPy thin films through cyclic voltammetry (CV), potentiostatic (PS), and galvanostatic (GS) modes have been analyzed. The resulting PPy thin films have been characterized by X-ray photoelectron spectroscopy (XPS), SEM, and TEM. The electrochemical properties of PPy thin films were investigated by cyclic voltammetry and galvanostatic charge/discharge. The results showed that the different electrodeposition modes of synthesis significantly affect the supercapacitive properties of PPy thin films. Among different modes of electrodeposition, PPy synthesized by a potentiostatic mode exhibits maximum specific capacitance of 166 F/g with specific energy of 13 Wh/kg; this is attributed to equivalent proportions of the oxidized and neutral states of PPy. Thus, these results provide a useful orientation for the use of optimized electrodeposition modes for the growth of PPy thin films to be applied as electrode material in supercapacitors.

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“…The mechanism of nucleation includes instantaneous and progressive nucleation, and the direction of nucleation includes two dimensional (2-D) and three dimensional (3-D) growth. Many reports indicated that the nucleation and growth mechanisms are instantaneous 2-D and progressive 3-D [18,20]. A few reports revealed that the nucleation mechanism is 2-D layer-by-layer growth [21 ± 23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Structure, Nucleation and Growth Mechanism of Electropolymerized Polypyrrole on Highly Oriented Pyrolytic Graphite Electrode

Santhanam

Lin

2003

Electroanalysis

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Chronoamperometry (i ± t) and atomic force microscopy (AFM) were used to study the nucleation and growth mechanism of electropolymerized polypyrrole formed on highly oriented pyrolytic graphite (HOPG) substrate surface. From i ± t measurements it was found that the nucleation and growth mechanism was a 3-D progressive after nuclei overlapping. However, before nuclei overlapping, it was not clear whether the mechanism was 2-D instantaneous or 3-D progressive. This ambiguity in the nucleation and growth mechanism was confirmed as 3-D progressive from the results of AFM measurements. In addition to nucleation and growth mechanism, possible models were proposed for different structures observed on the AFM image of polypyrrole, obtained from very early stages of polymerization.

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Mechanism of formation of polypyrrole on a Pt electrode from aqueous solutions

Cited by 64 publications

References 6 publications

Influence of HDTMA/Bentonite Ratio on Phenol Electrooxidation

Influence of HDTMA/Bentonite Ratio on Phenol Electrooxidation

Electrochemical supercapacitive properties of polypyrrole thin films: influence of the electropolymerization methods

Evaluation of Structure, Nucleation and Growth Mechanism of Electropolymerized Polypyrrole on Highly Oriented Pyrolytic Graphite Electrode

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