Electrochemical reduction of cyanides at metallic cathodes : A comparison with biological HCN reduction
The electrochemical reduction of cyanides has been studied at a number of cathodes both in near-neutral and in alkaline solutions. Nickel appears as the most effective cathode material, promoting cyanide reduction with current efficiencies close to 70%, even in moderately alkaline solutions. In all...
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Veröffentlicht in: | Journal of the Electrochemical Society 2001-03, Vol.148 (3), p.D19-D23 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The electrochemical reduction of cyanides has been studied at a number of cathodes both in near-neutral and in alkaline solutions. Nickel appears as the most effective cathode material, promoting cyanide reduction with current efficiencies close to 70%, even in moderately alkaline solutions. In all cases, the eletroreduction of cyanides leads to a mixture of 4e exp - (methylamine) and 6e exp - products (methane and ammonia). The use of Nafion films loaded with Ni microparticles enabled us to markedly increase the effective current densities for cyanide reduction. The electrochemical reduction of HCN/CN exp - is shown to present interesting similarities and differences with the biological cyanide reduction process. |
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ISSN: | 0013-4651 1945-7111 |
DOI: | 10.1149/1.1348261 |