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Kinetics of electrooxidation of phenol on polycrystalline platinum

). Kinetic aspects of ethanol electrooxidation on catalytic surfaces of Pt in 0.5 M H2SO4. Int. J. Electrochem. Sci. 7, 3327-3338. 12. Macdonald, J.R. (1987). Impedance spectroscopy, emphasizing solid materials and systems. New York: John Wiley & Sons. 13. Pajkossy, T. (1994). Impedance of rough capacitive electrodes. J. Electroanal. Chem. 364, 111-125. DOI: 10.1016/0022-0728(93)02949-I. 14. Conway, B.E. (2005). Impedance Spectroscopy. Theory, Experiment, and Applications, Barsoukov, E. & Macdonald, J.R. (Eds.), Wiley

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Electrooxidation of phenol on carbon fibre-based anodes through continuous electrolysis of synthetic wastewater

.jhazmat.2008.05.063. 9. Zhang, C., Jiang, Y., Li, Y., Hu, Z., Zhou, L. & Zhou, M. (2013).Three-dimensional electrochemical process for wastewater treatment: A general review. Chem. Eng. J. 228, 455–467. DOI: 10.1016/j.cej.2013.05.033. 10. Comninellis, Ch. & Pulgarin, C. (1993). Electrochemical oxidation of phenol for wastewater treatment using SnO 2 anodes. J. Appl. Electrochem. 23, 108–112. 11. Arslan, G., Yazici, B. & Erbil, M. (2005). The effect of pH, temperature and concentration on electrooxidation of phenol. J. Hazard. Mater . B124, 37–43. DOI

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Electrochemical oxidation of salicylhydroxamic acid on Pt electrode

Abstract

The electrochemical oxidation behavior of salicylhydroxamic acid (SHAM) on a Pt electrode was investigated in aqueous solution of different pHs, containing 10 mM of SHAM, at 25°C, by cyclic voltammetry technique. The results indicate that the SHAM was oxidized more easily in alkaline medium than acidic and neutral mediums, and the oxidation peaks of SHAM shifted toward lower potential values by increasing pH values. The SHAM electrooxidation involves an irreversible transfer of one or two electron, depending on the pH of solution. If solution pH is lower than 3 and higher than 7, the two electron transfer is involved in the electrooxidation. While, from pH=3 to pH=7, the SHAM electrooxidation involves an irreversible transfer of one electron and two protons in the first step, in agreement with the one step one-electron mechanism. The effect of SHAM concentration on the electrode reaction was investigated in artificial saliva solution. SHAM gives a single irreversible oxidation wave over the wide concentration range studied. Possible mechanism of SHAM electrooxidation was proposed.

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Comparative Assessment of the Analytical Parameters in Ascorbic Acid and Sulphite Assay at a Spectrographic Carbon Working Electrode

Abstract

The aim of this study is the comparative investigation of spectrographic carbon electrode’s viability as working electrode, in ascorbic acid and sulphite asssessment. Cyclic voltammetry involves a linear sweeping of the potential, the analytical signal being represented by the anodic oxidation /cathodic reduction peak of the analyte. For both analytes, the electro-oxidation resulted in an anodic peak, correlable with ascorbic acid / sulphite concentration. The analytical range of linear response corresponded to 0.07 - 10 mM for ascorbic acid and to 15.5 mg/L - 4 g/L for sulphite. The relative standard deviation RSD (%) was 2.71 % for ascorbic acid and 2.88 % for sulphite. The sensitivities, given by the slopes of the calibration graphs were 88.88 μA/mmole/L for ascorbic acid and 477.37 μA/g/L for sulphite.

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Influence of expanded graphite coming from the electrochemical oxidation of phenol on cement-polymer matrix

LITERATURE CITED 1. Iotov, P.I. & Kalcheva, S.V. (1998). Mechanistic approach to the oxidation of phenol at a platinum/gold electrode in an acid medium. J. Electroanal. Chem. 442, 19–26. DOI: 10.1016/S0022-0728(97)00455-5. 2. Martínez-Huitle, C.A. & Ferro, S. (2006). Electrochemical oxidation of organic pollutants for the wastewater treatment: direct and indirect processes. Chem. Soc. Rev. 35, 1324–1340. DOI: 10.1039/B517632H. 3. Skowroński, J.M. & Krawczyk, P. (2004). Electrooxidation of phenol at exfoliated graphite electrode in alkaline

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Electrochemical Treatment of Water Contaminated with Methylorange

and boron-doped diamond electrodes. Electrochim. Acta, 52, 2006, 75-82. SIRÉS, I., BRILLAS, E., OTURAN. M.A., RODRIGO, M.A., PANIZZA, M.: Electrochemical advanced oxidation processes: today and tomorrow. A review. Environ. Sci. Pollut. R., 21, 2014, 8336-8367. VALERO, D., ORTIZ, J.M., EXPOSITO, E., MONTIEL, V., ALDAZ, A.: Electrochemical wastewater treatment directly powered by photovoltaic panels: electrooxidation of a Dye-containing wastewater. Environ. Sci. Technol., 44, 2010, 5182-5188. YUSUF, A.H., REDHA, M

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Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

-catalytic effect of nickel in the electro-oxidation of ethanol on binary Pt-Sn electrocatalysts. Electrochem. Commun. 7, 365-369. DOI: 10.1016/j.elecom.2005.02.006. 4. Dutta, A., Mahapatra, S.S. & Datta, J. (2011). High performance PtPdAu nano-catalyst for ethanol oxidation in alkaline media for fuel cell applications. Int. J. Hydrogen Energy 36, 14898-14906. DOI: 10.1016/j.ijhydene.2011.02.101. 5. Sheikh, A.M., Correa, P.S., da Silva, E.L., Savaris, I.D., Amico, S.C. & Malfatti, C.F. (2013). Energy conversion using Pd-based catalysts in direct

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Platinum dissolution and ethanol oxidation reaction on Pt-activated nickel foam in sodium hydroxide solution

LITERTURE CITED 1. Song, S.Q., Zhou, W.J., Zhou, Z.H., Jiang, L.H., Sun, G.Q., Xin, Q., Leontidis, V., Kontou, S. & Tsiakaras, P. (2005). Direct ethanol PEM fuel cells: The case of platinum based anodes. Int. J. Hydrogen Energy 30, 995–1001. DOI: 10.1016/j.ijhydene.2004.11.006. 2. Barbosa, A.F.B., Oliveira, V.L., van Drunen, J. & Tremiliosi-Filho, G. (2015). Ethanol electro-oxidation reaction using a polycrystalline nickel electrode in alkaline media: Temperature influence and reaction mechanism. J. Electroanal. Chem. 746, 31–38. DOI: 10.1016/j

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Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

leachates, J. Haz. Mat. , B123. [4] Naumczyk, J., Dmochowska, A., & Prokurat, I. (2006). Treatment of leachate from municipal landfills by using highly effective methods of oxidation and electrooxidation, Gas, Water and Sanitation Systems , 3. [5] Polish Standard PN-74/C-04578/03, Determination of chemical oxygen demand (COD) by dichromates. titration method. [6] Polish Standard PN-EN 1899:2000, Water quality - Determination of phosphorus - Ammonium molybdate spectrometrics method. [7] Polish Statute “The

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Comparison of classic and derivative UV spectrophotometric methods for determination of dextromethorphani hydrobromidum

, Chen X, Hu Z. Separation and determination of pseudoephedrine, dextromethorphan, diphenhydramine and chlorpheniramine in cold medicines by nonaqueous capillary electrophoresis. J Pharm Biomed Anal. 2005;39:285-289. Yang XJ, Li OL, Chen ZG, Liu C, Lan Y, Zhao S. Determination of pseudoephedrine hydrochloride and dextromethorphan hydrobromide in cold tablet by micro-fluidic chip. Fenxi Huaxue. 2008;36:673-677. Heli H, Majdi S, Jabbari A, Sattarahmady N, Moosavi-Movahedi AA. Electrooxidation of dextromethorphan on a

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