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New electrodes for silver(II) electrogeneration:comparison between Ti/Pt, Nb/Pt, and Nb/BDD

Racaud, Charlotte and Savall, André and Rondet, Philippe and Bertrand, Nathalie and Groenen Serrano, Karine New electrodes for silver(II) electrogeneration:comparison between Ti/Pt, Nb/Pt, and Nb/BDD. (2012) Chemical Engineering Journal, 211-212. 53-59. ISSN 1385-8947

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Official URL: http://dx.doi.org/10.1016/j.cej.2012.09.010


Electrochemical processes based on the regeneration of silver (II) are very efficient for the destruction or dissolution of persistent substances. The aim of this work is to assess new anode materials to replace the conventional platinum electrode. The electrochemical generation of Ag (II) by oxidation of Ag (I) in HNO3 (6mol/L) was evaluated at boron doped diamond on niobium substrate (Nb/BDD) anode and results are compared with those obtained on Ti/Pt and Nb/Pt anodes. The performance of these anodes was evaluated in a filter press reactor in batch operation mode. The rate of Ag (II) generation obtained on the Nb/BDD anode is similar to that obtained on platinized electrodes. A theoretical model is presented to predict the behavior of the system. Good agreement is found between experimental results and the theoretical model.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S1385894712011989
HAL Id:hal-00906378
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > AREVA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Société générale pour les techniques nouvelles - SGN (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:04 Sep 2013 10:44

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