期刊
ELECTROCHIMICA ACTA
卷 89, 期 -, 页码 488-496出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.11.074
关键词
Nitrogen oxyanions; Alloy electrodeposition; Copper; Nickel; Bimetallic cathodes
资金
- Regione Veneto [DGR 1102/2010]
The performances of electrodeposited CuNi alloys in the electrochemical reduction of nitrates and nitrites in alkaline electrolyte have been studied and compared with those of the individual metals. CuNi alloys have been deposited from a citrate bath and characterized by SEM-EDS: a large range of compositions (30-95 Cu at.%) was prepared by varying the deposition potential. Application to the electrochemical reduction of nitrate (and nitrite) shows that Cu-rich alloys (Cu = 70-95 at.%) work better than Cu: voltammetric waves show a lower overpotential in the order of 120-150 mV at fresh electrodes; chronoamperometries show higher initial currents and less severe current decay during prolonged polarization; electrolyses reduce more rapidly and with a better selectivity nitrate to ammonia. (C) 2012 Elsevier Ltd. All rights reserved.
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