Abstract

The electrochemical behavior of UCl3 was investigated in molten MgCl2NaCl at 550 °C. Using electromotive force measurements, we have measured the formal reduction potential (Eo’) at 550 °C of U3+/U0 as +0.276 V vs. Mg/MgCl2 (-1.400 V vs. Ag/AgCl 5 mol%) on the molal scale. We also present the design and construction of a sealed Mg/MgCl2 reference electrode and have determined this system demonstrates ideal nonpolarizable electrode behavior, confirming it as an appropriate choice of reference electrode in molten chloride salts.

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