A new method to determine AgCl(1% mol)/Ag electrode potential versus the standard chloride electrode potential in a LiCl-KCl eutectic

In this work, an innovative method was utilized to determine the AgCl(1% mol)/Ag reference electrode potential versus Cl-2/Cl- at 673 K. Instead of directly measuring the chlorine electrode potential, the AgCl(1% mol)/Ag electrode potential versus Cl-2/Cl- was calculated from the decomposition voltage of LiCl and the equilibrium potential of Li+/Li versus AgCl(1% mol)/Ag in a LiCl-KCl melt. The decomposition voltage of LiCl in the LiCl-KCl melt was calculated using the Nernst equation and the equilibrium potential of Li+/Li was determined by chronopotentiometry, open circuit chronopotentiometry and potentiodynamic scan techniques, and the deviation is within 5 mV. The AgCl(1% mol)/Ag electrode potential was determined to be -1.130 V vs Cl2/Cl- at 673 K. Since it does not involve direct injection of chlorine gas, this method is more convenient and safer than existing approaches. Furthermore, it also has the potential to be used to calibrate reference electrodes in a variety of melts.

Automated summary

In this study, an innovative method was employed to determine the AgCl(1% mol)/Ag reference electrode potential vs Cl-2/Cl- at 673 K. This method, which does not involve direct injection of chlorine gas, is more convenient and safer than existing approaches, and has the potential to be used for calibrating reference electrodes in various melts.