Oxygen Electrode Reaction in a LiCl–KCl Eutectic Melt

Abstract

Oxygen electrode reaction was investigated on a boron-doped diamond electrode in a LiCl-KCl eutectic melt. The standard formal potential of O 2O2- decreases with the elevation of temperature. The potential at 773 K is 2.424±0.003 V vs Li1Li. The standard formal free energy change increases with the temperature elevation, calculated to be -456.4±0.5 kJ mol-1 at 773 K. The standard formal entropy and enthalpy changes are determined to be -151±3 J K-1 mol -1 and -573.5±0.1 kJ mol-1, respectively, at 773 K. © 2009 The Electrochemical Society.