Electrochemical Studies of Fe(II) and Fe(III) in an Aluminum Chloride‐Butylpyridinium Chloride Ionic Liquid

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Abstract
Electrochemical studies of Fe(II) and Fe(III) have been carried out in an chloride ionic liquid at 40°C as a function of melt composition. Analysis of measurements in the basic (excess ) melt indicates and as the dominant species. Rotating disk electrode measurements indicate that the Fe(II) oxidation is reversible in the basic melt; the Fe(II)‐Fe(III) electron transfer process becomes irreversible in acidic systems. Viscosity and density measurements as a function of melt composition were made to permit evaluation of marked changes in limiting currents at the rotating glassy carbon disk electrode. It is shown that the Stokes‐Einstein equation is obeyed.
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