Electro-oxidation of chlorophenols at a gold electrode

Ureta-Zañartu, María Soledad; Bustos, P.; Díez, M.C.; Mora, Marı́a de la Luz; Gutiérrez, C.

doi:10.1016/s0013-4686(01)00448-0

Cited by 78 publications

(51 citation statements)

References 19 publications

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“…In this way, a phenoxy radical is formed which on its turn can start a polymerization reaction. Stabilization of the radical occurs by the delocalization of the radical centre over the aromatic ring [9,12]. the electrode results in a smaller amount of free gold and thus a decrease of the corresponding redox peaks.…”

Section: Methodsmentioning

confidence: 99%

“…Different bare electrode materials such as gold, platinum, glassy carbon and boron doped diamond electrodes have been tested [4,[9][10][11][12][13] as well as modified electrodes with different kinds of catalysts [14,15]. Especially the use of transition metallo phthalocyanines as electrocatalysts has lately attracted a wide research interest [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

Peeters

Wael

Bogaert

et al. 2008

Sensors and Actuators B: Chemical

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Because of their toxicity to humans and their tendency to bioaccumulate in the food chain, the detection of chlorophenols has been investigated intensively. This paper compares the oxidation of 4-chlorophenol on a bare gold electrode to its detection on gold electrodes electrochemically modified with either cobalt(II) tetrasulphonated phthalocyanine (CoTSPc) or 3,4 ,4 ,4 -copper(II) tetrasulphonated phthalocyanine (CuTSPc). Results show that the electrochemical behaviour of 4-chlorophenol depends on the molecular structure of the phthalocyanine thin film layers on the gold surface. In addition, the influence of the coordinating properties of the phthalocyanines on the sensitivity of the measurement and the fouling of the electrode material is discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

Peeters

Wael

Bogaert

et al. 2008

Sensors and Actuators B: Chemical

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“…On noble metal electrodes, oxidation of these compounds is inhibited by the formation of polymer films on the surface [8]. However, oxidation may be carried out continuously on metal oxide electrodes, such as PbO 2 or SnO 2 , doped with various metals [9 Á/15] at suitable pH, temperature and concentrations [16,17]. Benzoquinone and maleic acid (ma) have been identified as intermediates during the mineralization reaction [18,19].…”

Section: Introductionmentioning

confidence: 99%

Competitive electrochemical oxidation of p-chlorophenol and p-nitrophenol on Bi-doped PbO2

Borrás

Laredo

Scharifker

2003

Electrochimica Acta

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“…Along with biodegradation and photodegradation processes [1], many electrochemical studies have been reported in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. A wide variety of electrode materials, such as carbon black, CB [2], glassy carbon [3,6,9], glassy carbon modified with aluminosilicates [4], graphite [5,7,8], Au [10,15], diamond [16], boron-doped diamond [11,13] and Pt [12,14] have been used for the electro-oxidative removal of CPs. In addition, the electro-polymerization behavior of CPs during voltammetric measurements (electrode fouling) has been reported, as has the fact that the tars formed display a low rate of oxidation, low permeability and strong adhesion to the electrode [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electro-oxidation of chlorophenols on powdered carbon electrodes of different porosity

Biniak

Pakuła

Świątkowski

et al. 2014

Reac Kinet Mech Cat

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Activated carbons with large and medium-sized S BET , carbon blacks with different surface areas as well as graphite and heat-treated carbon of extremely low porosity were used in this study. Cyclic voltammograms were recorded for these materials in neutral electrolyte (0.1 M Na 2 SO 4 ) solutions containing various chlorophenols (CPs; 4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol) as depolarizers. The changes in the FTIR spectra of the electrode materials caused by the adsorption and/or coupling of CPs (and/or their degradation products) were recorded. HPLC was used for analyzing the concentration of CPs and their degradation products. The dependence of the electrochemical behavior of CPs with various chlorine contents on the character of carbon materials is discussed. The possible mechanism of the initial stages of CP degradation by electro-oxidation/ reduction depends on the kind of electrode material. Since different carbons vary in their electrochemical behavior and in their voltammetric response to the presence of different CPs, the application of the method for selecting electrode materials better suited to removing organochlorine impurities from ground-water seems feasible. The efficiency of the process depends closely on the kind of carbon and on the tendency for its surface to become covered by a polymeric (conducting or nonconducting) film of electro-degradation products.

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Electro-oxidation of chlorophenols at a gold electrode

Cited by 78 publications

References 19 publications

The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

Competitive electrochemical oxidation of p-chlorophenol and p-nitrophenol on Bi-doped PbO2

Electro-oxidation of chlorophenols on powdered carbon electrodes of different porosity

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