Electroreduction of nitrate ions in concentrated sodium hydroxide solutions at lead,zinc, nickel and phthalocyanine-modified electrodes |
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| Authors: | H. -L. Li J. Q. Chambers D. T. Hobbs |
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| Affiliation: | (1) Department of Chemistry, University of Tennessee, 37996 Knoxville, TN, USA;(2) Savannah River Laboratory, E. I. DuPont de Nemours & Co., 29808 Aiken, SC, USA;(3) Present address: Department of Chemistry, Lanzhou University, Ganzu, China |
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| Abstract: | The electrochemical reduction of nitrate in strongly alkaline solution has been studied using nickel, lead, zinc and iron cathodes. Intermediate formation of nitrite ion and ammonia product was observed for all electrode materials. Coating a nickel sponge electrode with phthalocyanine renders it less active toward nitrate reduction, while iron electrodes appear to be activated. Electrolysis between a lead cathode and a nickel anode is an efficient means of removing nitrate from strongly alkaline solutions. |
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