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Role of hydroxyl radicals during the competitive electrooxidation of organic compounds on a boron-doped diamond anode

Groenen-Serrano, Karine and Weiss-Hortala, Elsa and Savall, André and Spiteri, Pierre Role of hydroxyl radicals during the competitive electrooxidation of organic compounds on a boron-doped diamond anode. (2013) Electrocatalysis, vol. 4 (n° 4). pp. 346-352. ISSN 1868-2529

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Official URL: http://dx.doi.org/10.1007/s12678-013-0150-5

Abstract

A numerical model has been developed to estimate the role of hydroxyl radicals in the competition of organic compounds during electrolysis using a boron-doped diamond (BDD) anode. It is well established that hydroxyl radicals are generated during water discharge. These radicals are free at the surface and act locally, their sphere of activity was estimated by the model to be 20 nm maximum from the anode. The implementation of the model taking account the presence of one and then two organic compounds in the solution can be used to predict the variation of the concentration of each organic with time during the electrolysis and their space profile in the electrochemical reactor too without using adjustable parameters. The role of hydroxyl radicals was highlighted in the competitive reaction with organics: the electrolysis of a solution containing an equimolar mixture of formic acid (FA) and maleic acid (MA) shows that FA oxidation only began when the MA had completely disappeared. The numerical model is in good agreement with the experiment and is thus suitable to describe the competition of two organics during electrolysis with a BDD anode.

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The definitive version is available at http://link.springer.com The original PDF of the article can be found at Electrocatalysis website : http://link.springer.com/article/10.1007%2Fs12678-013-0150-5
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole des Mines d'Albi-Carmaux - EMAC (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université de Toulouse I-Sciences Sociales - UT1 (FRANCE)
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Deposited By: IRIT IRIT
Deposited On:09 Mar 2016 14:49

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