Abstract
The electrochemical properties of calcium nitrate tetrahydrate were studied by voltammetry, coulometry, and chemical analysis. The electrolyte anode reaction was oxidation of water to oxygen on either gold or platinum. The major reaction at a gold cathode was reduction of nitrate to nitrite and a solid calcium hydroxide electrode film. Small amounts of oxygen and more than the theoretically predicted quantity of nitrite were detected, suggesting a secondary chemical reaction. The reduction reaction at platinum gave 50–75% of the theoretical yield of nitrite. The voltammetric behavior of OH−, , and in this system were studied.
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