Electrocatalytic reduction of nitrite on tetraruthenated metalloporphyrins/Nafion glassy carbon modified electrode

Calfumán, Karla; Aguirre, Marı́a J.; Cañete-Rosales, Paulina; Bollo, Soledad; Llusar, Rosa; Isaacs, Mauricio

doi:10.1016/j.electacta.2011.07.057

Cited by 31 publications

(28 citation statements)

References 60 publications

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“…The last decades have witnessed an expansive interest in the detection and quantification of nitrite (NO2ˉ) owing to the actuality of formation of carcinogenic nitrosamines by the interaction of nitrites with amines and also the oxidation of hemoglobin to methemoglobin, causing health issues such as methemoglobinemia [1,2]. Additionally, nitrite is customarily used as a preservative, dyeing agent, fertilizer and food additive.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

Jaiswal

Tiwari

Foster

et al. 2017

Electrochimica Acta

106

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A screen-printed amperometric sensor based on carbon ink bulk-modified with MnO2 decorated graphene oxide (MnO2/GO-SPE) nanocomposite was investigated for its ability to serve as a sensor towards nitrite. The composite was prepared by simple ultrasonication and reflux methodology and was characterized by FT-IR spectroscopy, transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, Atomic force microscopy and electrochemically using cyclic voltammetry, chronoamperometry and differential pulse voltammetry techniques. The MnO2/GO-SPE was found to exhibit an electro-catalytic activity for the electrochemical oxidation of nitrite in 0.1 M phosphate buffer solution (pH 7.4). The electrochemical oxidation of nitrite occurs at +0.55 V (Vs. Ag/AgCl) with a limit of detection (3σ) found to be 0.09 µM and with two linear ranges of 0.1 µM to 1 µM and 1 µM to 1000 µM with sensitivities of 1.25 µAµMˉˡcmˉ² and 0.005 µAµMˉˡcmˉ² respectively. Furthermore, the MnO2/GO-SPE showed an excellent anti-interference ability against a range of commonly encountered electroactive species and metal ions. Additionally, the fabricated MnO2/GO-SPE nitrite sensor presented excellent selectivity, reproducibility and stability. The present study widens the scope of applications of graphene-based nanocomposite materials for on-site monitoring of nitrite.

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Section: Introductionmentioning

confidence: 99%

Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

Jaiswal

Tiwari

Foster

et al. 2017

Electrochimica Acta

106

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“…11,12 This methodology, whose immediate antecedent is the analysis of solids in carbon paste electrodes, [13][14][15][16][17][18][19] is based on the abrasive transference of several particles of the solid sample to the surface of an inert electrode in contact with a suitable electrolyte. 54 Here, mapping of the pigment distribution in stratified paint layers is achieved by using a redox competition based strategy, [54][55][56] which also assists in differentiating between different types of pigments by applying different input potentials to the sample. [26][27][28][29][30] Additionally, as recently reviewed, 31 the VIMP technique can also provide relevant information for authentication, 32 technical grouping 33,34 and dating.…”

Section: Introductionmentioning

confidence: 99%

Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Doménech‐Carbó

Silva

et al. 2015

Analyst

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The use of the scanning electrochemical microscopy (SECM) technique for identifying and mapping of both organic and inorganic pigments in sub-microsamples from pictorial specimens is described. This methodology, inspired by the voltammetry of immobilized particles technique, permits the study of textural properties of paint layers and mapping the distribution of pigment grains upon application of different potentials to the substrate. A combination of the redox competition SECM strategy with voltammetry yields a local identification methodology for different organic and inorganic pigments in paint samples.

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“…This could be caused by differences in the interaction between the porphyrin and Nafion or PVC. When using Nafion, two main interactions exist: an electrostatic interaction between the sulfonate groups found within the hydrophilic pores of the polyelectrolyte structure and the positive charges of MTRP, also a hydrophobic nature interaction, between the fluorocarbon chain of the Nafion and the π‐system of the aromatic ring . In addition, the bipyridine ligand allows for greater stacking between adjacent molecules .…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Conversion of Carbon Dioxide into CHO‐Containing Compounds on Multimetallic Porphyrins

et al. 2017

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This work describes the electrochemical reduction of carbon dioxide in aqueous solution mediated by tetraruthenated metalloporphyrins (TRP; Co(II) and Zn(II)) in Nafion (Nf) and polyvinyl chloride (PVC) as a support. The comparative aspects of the two polymeric matrices are expressed in terms of the electrocatalytic behavior toward carbon dioxide reduction of both sets of modified electrodes; values of overpotential and turnover frequency were calculated in each case. The modified electrodes under survey were able to reduce carbon dioxide at −600 mV vs Ag/AgCl showing an enhanced reduction current and a decrease in the required overpotential compared to a bare glassy carbon (GC) electrode. Potential‐controlled electrolysis experiments were carried out at −1000 mV in order to compare the distribution of products. The production of formic acid, formaldehyde and methanol was confirmed at potentials where reduction of solvent may occur. Measurements of electrochemical impedance spectroscopy show the presence of one active site for GC/Nf/MTRP (where M=Zn(II) and Co(II)) and three for GC/PVC/MTRP. This information corroborates the high values of TOF obtained for GC/PVC/ZnTRP as the best electrocatalyst.

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Electrocatalytic reduction of nitrite on tetraruthenated metalloporphyrins/Nafion glassy carbon modified electrode

Cited by 31 publications

References 60 publications

Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Electrochemical Conversion of Carbon Dioxide into CHO‐Containing Compounds on Multimetallic Porphyrins

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