D. Tench, M. Kendig, S. Jeanjaquet
Feb 1, 1994
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Journal
Journal of The Electrochemical Society
Abstract
Oxide films are of interest for a variety of practical applications, including corrosion protection, batteries, high temperature superconductors, catalysts, electronic devices, and flat panel displays. Copper injected anodically into eutectic Na-K nitrate melt at 300 C is shown to deposit cathodically as cupric oxide (CuO). The dissolved copper is in the +2 oxidation state and apparently forms a nitrate complex that facilitates reduction of nitrate to oxide (and nitrite) at potentials more than a volt positive of that for reduction of the Na/K nitrate species. From these results and literature studies, cathodic metal oxide deposition from nitrate melts appears to be a general phenomenon that could prove to be a practical means of preparing anhydrous metal oxide films.