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Kinetic Study of the Electrochemical Mineralization of m-Cresol on a Boron-Doped Diamond Anode

Flox, Cristina and Brillas, Enric and Savall, André and Groenen-Serrano, Karine Kinetic Study of the Electrochemical Mineralization of m-Cresol on a Boron-Doped Diamond Anode. (2012) Current Organic Chemistry, vol. 16 (n° 17). pp. 1960-1966(7). ISSN 1385-2728

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Official URL: http://dx.doi.org/10.2174/138527212803251712

Abstract

The kinetics of the electrooxidation of m-cresol in aqueous solution was investigated in a one-compartment flow electrochemical cell with a boron-doped diamond electrode (BDD). Cyclic voltammograms recorded on BDD revealed that cresol oxidation takes place at a potential very close to the discharge of water. Under potentiostatic conditions, at a working potential lower than water discharge, a passive layer was rapidly formed on the electrode surface due to cresol polymerization. The anode fouling was not observed during electrolysis performed with the flow electrochemical cell operating under galvanostatic conditions. In this case, the decay of mcresol concentration followed a pseudo-first-order kinetics. The abatement of chemical oxygen demand (COD) showed that the kinetics of m-cresol oxidation was limited by mass transfer and that a full mineralization was achieved. A good agreement between predicted and experimental COD and instantaneous current efficiency values was obtained, although some deviations were observed at high current since the experimental data decreased faster than those predicted ones. These deviations can be explained by the occurrence of oxygen evolution which increases the mass transfer coefficient.

Item Type:Article
Additional Information:Thanks to Bentham Science editor. The definitive version is available at http://www.ingentaconnect.com/content/ben/coc/2012/00000016/00000017/art00006
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Catalonia Institute for Energy Research - IREC (SPAIN)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universitat Autònoma de Barcelona - UAB (SPAIN)
Other partners > Universitat de Barcelona - UB (SPAIN)
Laboratory name:
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Deposited By: Karine Groenen Serrano
Deposited On:27 Aug 2013 16:03

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