New insight into the electroreduction of nitrate ions at a copper electrode, in neutral solution - Laboratoire Interfaces et Systèmes Electrochimiques Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2010

New insight into the electroreduction of nitrate ions at a copper electrode, in neutral solution

Résumé

The electroreduction of nitrate ions was investigated at a copper electrode in an unbuffered neutral aqueous solution. In the presence of nitrates, cyclic voltammetry revealed three cathodic waves. Rotating disk electrode measurements and the effect of potential scan rate were combined to further explore the reaction mechanism. Taking into account water reduction and using Koutecky-Levich analyses of the data obtained with linear sweep voltammetry at various electrode rotation rates, the number of electrons involved in the global reaction was found to be 2, 7 and 8, in accordance with nitrate reduction into nitrite, hydrazine and ammonia, respectively. Finally, we suggest that nitrogen oxides due to ammonia oxidation at the Pt counter electrode adsorb on copper electrode and block the nitrate reduction.

Domaines

Chimie
Fichier principal
Vignette du fichier
Aouina-Tran 2010_VF.pdf (251.46 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04113014 , version 1 (01-06-2023)

Identifiants

Citer

Nizar Aouina, Hubert Cachet, Catherine Debiemme-Chouvy, Thi Tuyet Mai Tran. New insight into the electroreduction of nitrate ions at a copper electrode, in neutral solution. Electrochimica Acta, 2010, 55 (24), pp.7341-7345. ⟨10.1016/j.electacta.2010.07.032⟩. ⟨hal-04113014⟩
17 Consultations
28 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More