Fig. 2: HT-OER performances of the Fe electrode in molten carbonates.
From: An iron-base oxygen-evolution electrode for high-temperature electrolyzers
a Optical graphs of the iron anode before and after pre-oxidation in molten carbonates. b SEM image (b1), EDS mapping (Fe (b2), O (b3)), and SIMS mapping (Li (b4)) of the cross-section of oxide scale. c SEM image of the oxide scale that directly contacts with molten salt. d XRD pattern of the oxide scale. e Profiles of the oxygen content of the outlet gas as functions of current density and time during constant-current electrolysis. f Cell voltage profile as a function of time at 100 mA/cm2 in molten Li2CO3–Na2CO3–K2CO3 at 450 °C.
