Electrocatalytic oxidation of As(III) to As(V) using noble metal–polymer nanocomposites

Sánchez, Julio; Rivas, Bernabé L.; Pooley, S. Amalia; Basáez, Luís; Pereira, Eduardo; Pignot-Paintrand, Isabelle; Bucher, Christophe; Royal, Guy; Saint‐Aman, Eric; Moutet, Jean‐Claude

doi:10.1016/j.electacta.2010.03.080

Cited by 51 publications

(28 citation statements)

References 30 publications

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“…Noble metals and metal oxides can be used for this purpose especially in the form of particles of nanometer size, particularly as electrode materials formed from the dispersion of nanoparticles in functionalized polymer matrices [19].…”

Section: Electrocatalytic Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

“…The efficiency of electro-oxidation of As(III) to As(V) was evaluated using the carbon/polymer/Pt nanocomposites-modified electrodes previously synthesized and reported [19]. The polymer films were grown by oxidative polymerization on carbon felt (RVC 2000, 65 mg cm −3 , from Le Carbone Lorraine) electrodes (20 mm × 20 mm × 4 mm) using a polymerization charge of 5 Coulomb.…”

Section: Electrochemical Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

“…The precipitation of platinum metal in the polymer was performed by electroreduction at-0.2 V vs. Ag|AgCl in 10 −4 M K 2 PtCl 4 ; a charge of 5 Coulomb was passed, which corresponds to deposition of 5 mg of platinum. Glassy carbon electrodes (3 mm diameter) were also previously modified in order to obtain the sensor nanocomposite material for As(III) monitoring by anodic oxidation [19].…”

Section: Electrochemical Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

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Arsenic extraction from aqueous solution: Electrochemical oxidation combined with ultrafiltration membranes and water-soluble polymers

Sánchez

Rivas

2010

Chemical Engineering Journal

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Section: Electrocatalytic Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

Section: Electrochemical Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

Section: Electrochemical Oxidation Of As(iii) To As(v)mentioning

confidence: 99%

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Arsenic extraction from aqueous solution: Electrochemical oxidation combined with ultrafiltration membranes and water-soluble polymers

Sánchez

Rivas

2010

Chemical Engineering Journal

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“…The concentration of arsenite can be monitored at +0.48 V, i.e. at a lower potential than polypyrrolemetal nanocomposites 19,20 and Pt nanoparticles modified carbon electrode 14 reported previously in literature. The plot of the peak current vs. the concentration of As(III) is presented in Figure 5 B.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

FERROCENYL ALKYLAMMONIUM N-SUBSTITUTED POLYPYRROLE CONTAINING Pt AND Pd AND ITS APPLICATION ON ELECTROANALYSIS OF ARSENITE

Sánchez

Rivas²,

Moutet

et al. 2016

J. Chil. Chem. Soc.

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Arsenic occurs in a variety of forms and oxidation states and is a very toxic element. The main inorganic arsenic species present in natural waters are arsenate (oxidation state V) and arsenite ions (oxidation state III). Arsenite is more toxic and mobile than arsenate. Therefore, it is important the development of new materials for analysis and control of these toxic species.This research proves that polymer-metal composite electrode materials synthesized by incorporation of Pt 0 and Pd 0 nanoparticles into a poly(pyrrole-ferrocenyl alkylammonium) matrix present electrocatalytic properties towards the oxidation of arsenite to arsenate.The polymer films displayed a stable electrochemical response in aqueous solution. However, when the polymer film modified electrode were transferred to aqueous solution in presence of arsenite anions, the CV curves for polymer films were deeply modified by the decrease in the electroactivity of the film. It can be concluded that the cationic polymer films present a strong affinity toward arsenite anions. The composite films containing Pt 0 or Pd 0 showed catalytic activity towards oxidation of As(III) to As(V) due to the presence of metal catalyst particles into the polymer films.

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“…Consequently, we set out to exploit this last property, so little explored as far as the application of these materials is concerned, considering its prospective utility in the development of a device for cations extraction 24 . To this purpose, it was bore in mind previous results concerning the use of polypyrrole p-doping/undoping for arsenate ion and copper complexes extraction [25][26][27][28][29] , proving that just as p-doping/undoping was suitable for anions removal or extraction, so was n-doping/undoping for cations. Furthermore, in the case of arsenic a sensor was designed to determine this element in its anionic form 30 .…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Valle

Llanquileo

Díaz

et al. 2014

J. Chil. Chem. Soc.

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The electro-synthesis of poly (3,4-ethylenedioxythiophene), PEDOT, has been widely studied due to its different and important applications. Considering that one of the most important electrochemical characteristics of this polymer is its ability to undergo p-and n-doping/undoping, our research group has tested its potential usefulness for cations extraction based on the n-doping/undoping process, hitherto almost unexplored. Therefore, in a first stage, EDOT was electropolymerized on AISI 316 stainless steel, SS, and the SS|PEDOT modified electrode was then obtained. Applying the n-doping potential to these SS|PEDOT electrodes immersed in Hg(II) solution at physiological pH (PBS) it was verified that the cation was incorporated into the polymeric matrix and, depending on the area of the working electrode and removal method (n-doping/undoping), its quantitative extraction was possible. It was also found that the charge recorded during the process is proportional to Hg(II) concentration, hence the assembly is now proposed as sensor for this cation. To this end, in the current paper the amperometric response of the SS|PEDOT electrode toward Hg(II) in PBS, prepared under the optimum conditions previously established and described, was studied. First of all, it is noteworthy establishing that the response obtained with a freshly prepared SS|PEDOT electrode prior to each measurement is highly reproducible. Having this in mind, the modified electrode can be thought as a sensor that may be utilized as a disposable device. Once the electrode response was optimized, analytical parameters were established, namely linear response between 66.6 µmol·L -1 -1.0 mmol·L -1 Hg(II), 1s response time, and quantification and detection limit 10 and 15 µmol·L -1 , respectively. It is possible thus to have at our disposal a suitable and inexpensive sensor that would enable quick and economical quantification of this toxic element using electrochemical methods.

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Electrocatalytic oxidation of As(III) to As(V) using noble metal–polymer nanocomposites

Cited by 51 publications

References 30 publications

Arsenic extraction from aqueous solution: Electrochemical oxidation combined with ultrafiltration membranes and water-soluble polymers

Arsenic extraction from aqueous solution: Electrochemical oxidation combined with ultrafiltration membranes and water-soluble polymers

FERROCENYL ALKYLAMMONIUM N-SUBSTITUTED POLYPYRROLE CONTAINING Pt AND Pd AND ITS APPLICATION ON ELECTROANALYSIS OF ARSENITE

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

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