Poly(N-methylpyrrole) films doped with iron-substituted heteropolytungstates: a new sensitive layer for the amperometric detection of nitrite ions

Fabre, Bruno; Bidan, Gérard; Łapkowski, Mieczysław

doi:10.1039/c39940001509

Cited by 49 publications

(14 citation statements)

References 17 publications

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“…The electrochemical analysis of the most popular Keggin-type POMs (phosphotungstate and tungstosilicate) in the presence of acidic solution revealed three reversible reduction peaks originating from two one-electron processes followed by one two-electron process [17,21,22,36]. Similar electrochemical behavior was described when these compounds were introduced into organic polymers or a silica matrix [6,23,24,[37][38][39][40][41]. Kulesza et al [21,22,25] studied solid-state electrochemistry of these heteropolyacids and showed that the electrochemical behavior of both acids was almost the same as the behavior observed in solutions, namely: well-separated and reversible reduction peaks.…”

Section: Introductionmentioning

confidence: 50%

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Adamczyk

Miecznikowski

2013

J Solid State Electrochem

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We demonstrate the electrochemical characteristics of the, poorly described in the literature, mixed-valence proton conducting solid borotungstic acid single crystal, H 5 BW 12 O 40 xH 2 O, in the absence of liquid electrolyte phase. We performed electrochemical measurements in an all-solid cell with a gold fiber ultramicrodisk (diameter 10, 25, and 40 μm) working electrode, a silver semi-reference disk electrode, and a glassy carbon ring counter electrode. Diagnostic experiments at different scan rates aimed at probing the model of mass transport and potential kinetic limitations. Such bulk parameters as the effective diffusion coefficient of charge propagation and the concentration of mixed-valence redox centers were determined by two methods. The first method is based on the analysis of both Cottrellian and steady-state currents (the mixed-regimes method), and the second method provides the true diffusion coefficient (transport coefficient free of the migration influence) for both the substrate and the product of the electrode reaction. Together, these methods constitute a double potential step chronoamperometry experiment. The data obtained with these electrochemical experiments (effective diffusion coefficients, concentration of mixed-valence redox centers, etc.) can support the results obtained with other techniques (XRD, FTIR, and TGA).

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Section: Introductionmentioning

confidence: 50%

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Adamczyk

Miecznikowski

2013

J Solid State Electrochem

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“…7 It has also been shown that a large variety of Kegginand Dawson-type polyoxometalates (POMs) are efficient in the electrocatalytic reduction of nitrite and nitric oxide. [8][9][10][11][12][13] However, almost all these POMs were used directly in aqueous solutions or immobilized on the electrode surfaces as catalyst. 14 A serious drawback in the application of these surface modified electrodes is their poor long-term stability; moreover, the electrode surfaces can not be renewed in the event of leakage, contamination and passivation.…”

Section: Introductionmentioning

confidence: 99%

Renewable-surface amperometric nitrite sensor based on sol–gel-derived silicomolybdate–methylsilicate–graphite composite material

Wang

et al. 2000

Analyst

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A new type of silicomolybdate-methylsilicate-graphite composite material was prepared by the sol-gel technique and used for the fabrication of an amperometric nitrite sensor. The silicomolybdic anion acts as a catalyst, the graphite powder ensures conductivity by percolation, the silicate provides a rigid porous backbone and the methyl groups endow hydrophobicity and thus limit the wetting section of the modified electrode. Cyclic voltammetry, square-wave voltammetry and chronoamperometry were employed to characterize the sensor. The amperometric nitrite sensor exhibited a series of good properties: high sensitivity (1.771 mA mmol 21 dm 3 ), a short response time (7 s), remarkable long-term stability and especially reproducibility of surface renewal in the event of electrode surface fouling.

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“…Previous reports on SiW 11 Fe or PW 11 Fe polymer-doped electrodes are in agreement with this observation. The former has been incorporated into polypyrrole films [51], whereas studies with the latter used polypyrrole, polyaniline, polythiophene and derivatives [52][53][54][55]. Cyclic voltammograms show two tungsten and one iron redox peak, which in most cases are surface-confined processes [53,54], but electrocatalytic properties and stability vary with the system studied.…”

Section: Film Formation and Stabilitymentioning

confidence: 98%

Modified electrodes with Keggin-type silicotungstates and poly(brilliant cresyl blue)

Fernandes

Brett

Cavaleiro

2012

J Solid State Electrochem

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Electrosynthesis of poly(brilliant cresyl blue) in aqueous solution in the presence of Keggin-type polyoxotungstates, [SiW 11 Fe(H 2 O)O 39 ] 5− or [SiW 11 Co(H 2 O)O 39 ] 6− , was used to prepare modified glassy carbon electrodes. The deposited hybrid organic/inorganic films were studied and characterised by cyclic voltammetry and electrochemical impedance spectroscopy. Cyclic voltammetry showed that the electrochemical features of the polyoxoanions were maintained after immobilisation, with the first tungsten reduction peak involving the uptake of protons from the solution. The chemically modified electrodes were stable, and their preparation was easy to perform. The results provide valuable information for exploring future applications of these films in electrochemical sensors or electrocatalysis.

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Poly(N-methylpyrrole) films doped with iron-substituted heteropolytungstates: a new sensitive layer for the amperometric detection of nitrite ions

Cited by 49 publications

References 17 publications

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Renewable-surface amperometric nitrite sensor based on sol–gel-derived silicomolybdate–methylsilicate–graphite composite material

Modified electrodes with Keggin-type silicotungstates and poly(brilliant cresyl blue)

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