Electrooxidation of phenol on amorphous Ni–40Nb–(1−x)Pt–xSn alloys

Sistiaga, M.; Pierna, A.R.; Marzo, F.F.; Altube, A.; Lorenzo, A.

doi:10.1016/s0169-4332(98)00180-9

Cited by 15 publications

(5 citation statements)

References 10 publications

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“…Several works aimed to explore the electrochemical behaviour of different phenols for several reasons but mostly in aqueous solutions. Generally, the problem is during their electrooxidation the film formation at the surface of the commonly used bare electrodes (glassy carbon, Pt, Au) and they foul quickly [1][2][3][4][5][6][7]; thus, many limitations arise from this fact. For example, electrochemical determination of the most phenolic compounds in different samples encounters difficulties as reactivation of electrode surface makes the procedure more lengthy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of phenol electrooxidation in aprotic non-aqueous solvents by using cyclic and normal pulse voltammetry

et al. 2019

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Electrooxidation of phenol was studied on platinum electrode in five aprotic nonaqueous solvents (acetonitrile, dimethyl sulfoxide, dimethyl formamide, acetone, and tetrahydrofuran) with cyclic and normal pulse voltammetry. The cyclic voltammetric results showed that fouling of the electrode surface by the polyphenol took place continuously in dimethyl formamide and a weak passivation of the electrode could be observed in dimethyl sulfoxide. From this solvent, a coherent and mechanically removable, weakly adsorbed layer could be obtained. In the other three solvents, the electrode passivated completely after five scans. Diffusion barrier properties of the polymer formed in acetone were the most pronounced of all solvents towards a redox probe. Normal pulse voltammetric investigations showed that the extent of electrode passivation is insignificant in three of the solvents used. It was due to the application of the short anodic potential pulses where the oxidation of phenol occurred and the formed oligomers diffused into the bulk of solution.

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Section: Introductionmentioning

confidence: 99%

Investigation of phenol electrooxidation in aprotic non-aqueous solvents by using cyclic and normal pulse voltammetry

et al. 2019

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“…As a result, the anodic peak of phenol oxidation cannot be observed in cyclic voltammogram during the second scanning cycle unless the positive potential was increased to above 1.5 V vs. NHE (Boudenne et al 1998) or 2.0 V (Ahn et al 1998). In addition, the use of hydrogen fluoride to remove the surface polymer has also been reported (Sistiaga et al 1998). In this study, we used square wave technology at 100 -500 Hz frequencies in combination with a definite positive potential to remove the polymer for reactivation of electrode surface.…”

Section: Effect Of Phenol Polymerization On Accuracy Of Detectionmentioning

confidence: 99%

“…In addition, RuO 2 -TiO 2 /Ti and Pt/TiO 2 catalysts have been examined for catalytic wet oxidation of phenol (Trasatti 1991;Maugans and Akgerman 1997), but the oxidation is carried out in a batch reactor in temperature range of 150-2008C and a pressure range of 34-82 atm. The amorphous Ni-40Nb-(1-x)Pt-xSn alloys have been studied for electrooxidation of phenol in ppm level by hydrofluoric acid activation (Sistiaga et al 1998). Because of their special properties in surface chemistry and electronics, nanoscale colloidal mono-and bimetallic materials have recently attracted more attention (Bönnemann et al 1996;Schmid 1994;Aiken and Finke 1999).…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Phenol Oxidation on Mixed Pt‐RuO 2 Nanoparticle Modified Electrode

Tzang

Zhao

et al. 2005

Analytical Letters

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Nanoscale Pt/RuO 2 colloid with carbon paste support was synthesized and used to prepare a modified electrode for phenol detection. The results showed that the Pt/RuO 2 catalyst has high activity for electrooxidation of phenol with reduced intermediate polymerization due to its significantly low potential for phenol oxidation. The detection limit was as low as 10 29 mol L 21 for the polishable Pt/RuO 2 /C paste electrode with good reproducibility.

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“…There are few works dealing with the application of amorphous anodes for fuel cells [4]. Nevertheless, these amorphous materials have very attractive properties for the oxidation of the organic molecules, as phenol, hydroquinone or p-benzoquinone [5][6][7]. The main advantage that amorphous alloys manufactured by melt spinning have is the possibility of changing the nature of the electrode by alloying different catalytic elements that are decorating a conducting matrix.…”

Section: Introductionmentioning

confidence: 99%