Polypyrrole film electrodes electrochemically doped with tetrathiomolybdate anions: preparation and characterization

Girard, François; Ye, Siyu; Laperrière, Guylaine; Bélanger, Daniel

doi:10.1016/0022-0728(92)80559-m

Cited by 46 publications

(18 citation statements)

References 79 publications

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“…The shape and the shift to more negative potential (in comparison to a PPy/Cl -film electrode) of the cyclic voltammogram is reminiscent of PPy doped with immobile dopants. 28,38 However, the immobile dopant hypothesis does not explain why the cyclic voltammogram of a poly(N-methylpyrrole) chloride, PNMPy/Cl -, is unchanged following potential cycling in a DMcT solution. 13 These observations with the PPy/Cl -and the PNMPy/Cl -electrodes suggest that the chemical interaction between DMcT and PPy occurs via the nitrogen atom of PPy similarly to polyaniline and DMcT.…”

Section: Resultsmentioning

confidence: 96%

A New Polypyrrole/Disulfide Electrode Studied by Electrochemistry and the Electrochemical Quartz Crystal Microbalance

Bélanger

1996

J. Phys. Chem.

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A new polypyrrole/disulfide electrode has been prepared by electrochemical oxidation of an aqueous potassium 2,5-dimercapto-1,3,4-thiadiazole (K 2 DMcT) solution at an electropolymerized polypyrrole chloride, PPy/ Cl -, film electrode. The formation of this new electrode material was investigated by cyclic voltammetry and chronoamperometry in combination with the electrochemical quartz crystal microbalance (EQCM). Following cycling in a DMcT 2-solution, the cyclic voltammogram of a PPy/Cl -electrode changed significantly as the common redox waves of the PPy/Cl -electrode were no longer observed. Instead, a new set of anodic and cathodic waves appeared at more negative potential in addition to an irreversible anodic wave at about 0.2 V. The mass of a Au/PPy/Cl -electrode, immersed in a 50 mM DMcT 2-/0.1 M KCl solution, increases much more than that of a bare Au electrode when the potential was switched from 0 to 0.5 V whereas no mass variation was noticed for a Au/PPy/Cl -electrode when DMcT 2-was not present in the solution. In contrast, the cyclic voltammogram and the mass of a poly(N-methylpyrrole) chloride electrode did not change at all when the experiments are carried out in the same conditions as for the PPy/Cl -electrode. These results suggest that acid/base chemistry may occur between PPy and DMcT 2-although hydrogen bond formation between the NH moiety on the pyrrole ring and the sulfur of the monobasic form of DMcT cannot be ruled out completely. This PPy-DMcT electrode has also been characterized by cyclic voltammetry, EQCM, and in-situ conductivity measurements. This new material has unique properties compared to PPy/Cl -and is characterized by a redox potential of about -0.45 V vs Ag/AgCl, and the oxidized material has a conductivity of 7.5 × 10 -2 S cm -1 . The EQCM study shows that, unlike the PPy/Cl -electrode for which the anions are the mobile species, cation transport is significant for the PPy-DMcT electrode during potential cycling although anions are also mobile to some extent. This has important consequence for lithium ion batteries application where lithium cation transport is required. The cyclic voltammetry and EQCM data of the PPy-DMcT electrode are consistent with a mechanism that involves a polymerization/depolymerization reaction of the DMcT species entrapped in the electrode matrix and whose species interact chemically with PPy.

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Section: Resultsmentioning

confidence: 96%

A New Polypyrrole/Disulfide Electrode Studied by Electrochemistry and the Electrochemical Quartz Crystal Microbalance

Bélanger

1996

J. Phys. Chem.

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“…Many studies have been devoted to the (potential) applications of conducting polymers especially electroactive polymers deposited electrochemically on electrode surfaces because of the many possible applications of the polymers themselves as well as the modified electrode surfaces in; batteries,1–7 electrochromic devices,2, 8–10 microelectronic devices,11 optoelectronic,12 display devices,13 chemically modified electrodes,14 sensors,15, 16 electrochemical chromatography,17 metallization,18 and as corrosion inhibitors to protect semiconductors and metals 18–28…”

Section: Introductionmentioning

confidence: 99%

Electropolymerization kinetics of a binary mixture of pyrrole and o‐aminobenzoic acid and characterization of the obtained polymer films

Sayyah

El-Rabiey

El‐Rehim

et al. 2008

J of Applied Polymer Sci

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Poly (pyrrol-co-o-aminobenzoic acid) 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:2.00 . The apparent activation energy (E a ) is found to be 90.11 kJ mol 21 . The polymer films obtained have been characterized by cyclic voltammetry, X-ray diffraction, elemental analysis, thermogravimetric analysis, scanning electron microscopy, 1 H NMR, and IR-spectroscopy. The mechanism of the electrochemical polymerization reaction has been discussed. The monomer reactivity ratios (r 1 and r 2 ) were calculated.

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“…Electroactive polymers, deposited electrochemically on electrode surfaces, have received considerable attention because of possible applications of the bulk polymers themselves as well as for modified electrode surfaces, in batteries,1–7 electrochromic devices,2, 8–10 microelectronic devices,11 optoelectronic,12 display devices,13 chemically modified electrodes,14 sensors,15, 16 electrochemical chromatography,17 metallization,18 and as corrosion inhibitors to protect semiconductors and metals 18–28…”

Section: Introductionmentioning

confidence: 99%

Electropolymerization kinetics of o‐aminophenol and characterization of the obtained polymer films

Sayyah¹,

El-Rabiey²,

El‐Rehim³

et al. 2006

J of Applied Polymer Sci

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Poly(ortho-aminophenol) has been synthesized electrochemically from a previously deoxygenated acid medium. The initial rate of electropolymerization reaction on platinum electrode is small and the rate law is: Rate ϭ k 2 [D] 0.50 [HCl] 1.125 [M] 1.29 . The apparent activation energy (E a ) was found to be 68.63 kJ mol Ϫ1 . The polymer films obtained have been characterized by cyclic voltammetry, X-ray diffraction, elemental analysis, TGA, scanning electron microscopy, 1 H NMR, UV-visible, and IR spectroscopy. The mechanism of the electrochemical polymerization reaction has been discussed.

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Polypyrrole film electrodes electrochemically doped with tetrathiomolybdate anions: preparation and characterization

Cited by 46 publications

References 79 publications

A New Polypyrrole/Disulfide Electrode Studied by Electrochemistry and the Electrochemical Quartz Crystal Microbalance

A New Polypyrrole/Disulfide Electrode Studied by Electrochemistry and the Electrochemical Quartz Crystal Microbalance

Electropolymerization kinetics of a binary mixture of pyrrole and o‐aminobenzoic acid and characterization of the obtained polymer films

Electropolymerization kinetics of o‐aminophenol and characterization of the obtained polymer films

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