New electrodes for silverII electrogeneration:comparison between Ti-Pt, Nb-Pt, and Nb-BDDReportar como inadecuado




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1 LGC - Laboratoire de génie chimique 2 Société Générale pour les techniques Nouvelles - SGN FRANCE 3 AREVA NP

Abstract : 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.

Keywords : Ag II Boron doped diamond anode Electrolysis Electrosynthesis





Autor: Charlotte Racaud - André Savall - Philippe Rondet - Nathalie Bertrand - Karine Groenen-Serrano -

Fuente: https://hal.archives-ouvertes.fr/



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