Anodic Polarization Curves in Molten Carbonate Electrolysis

Abstract

Some anodic polarization curves for platinum, gold, and silver, for molten carbonate electrolysis in the range 500°–900°C and 10−6‐10−2 amp cm−2 are reported. All measurements were made using the ternary mixture, (mp 397°C), respectively, and the steady‐state overvoltage technique, the measurements being referred to the "platinum" reference electrode. A theoretical kinetic analysis of various possible processes contributing to anodic oxygen evolution is developed. It appears that in the region of 600°C, the rate‐determining process is