| Téléchargement | - Voir le manuscrit accepté : The electrochemical oxidation of alkaline copper cyanide solutions (PDF, 783 Kio)
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| Auteur | Rechercher : Cheng, S. C.1; Rechercher : Gattrell, M.1; Rechercher : Guena, T.1; Rechercher : MacDougall, B.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
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| Format | Texte, Article |
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| Sujet | cyanide oxidation; copper complexes; hydroxide ions; copper oxide and nitrate |
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| Résumé | A systematic investigation of the electrochemical oxidation of copper cyanide was carried out. At low pH, cyanide destruction is believed to be catalyzed by the heterogeneous reaction involving adsorbed [Cu(CN)3]2- and possibly [Cu(CN)4]3-. At high pH, rapid oxidation of cyanide was observed around 0.75 versus Hg/HgO with the formation of a black copper oxide film. This enhanced electrocatalytic activity is believed to be related to the formation of an active copper(III) species. The transition point between low and high pH as a function of cyanide and copper concentrations is discussed. Bulk electrolysis of a copper cyanide solution at 0.90 V oxidized most of the cyanide to cyanate. Prolonged electrolysis further oxidized the cyanate to nitrate. The copper oxide film is found to be catalytic, capable of electro-oxidizing hydroxide to oxygen and cyanate to nitrate. |
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| Date de publication | 2002 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRCC 52284 |
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| Numéro NPARC | 16285573 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | bbdf5eb3-02ec-482a-a07c-4c40947424e7 |
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| Enregistrement créé | 2010-11-01 |
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| Enregistrement modifié | 2020-03-30 |
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