Solubilities of La and Ni on LaNiO3 in Li/K Carbonate Eutectic with La2O3

Abstract

The solubilities of La and Ni on LaNiO3 in Li/K carbonate eutectic with La2O3 have been investigated. The solubilities of La and Ni were 1.9 × 10−2 (mole fraction) and 1.2 × 10−5 (mole fraction) under CO2/O2 of 0.7/0.3 at 923 K. The extraction of Ni from LaNiO3 in molten carbonate saturated with La2O3 was almost 57% lower than that from NiO in a molten carbonate without La2O3.

Charge and Mass Transfer on a La2O3 Added Li/Na or Li/K Molten Carbonate Meniscus Electrode of LaNiO3 Coated Au Ring for Oxygen Reduction Reaction

“…The dependence of i lc on gas composition is as follows: [6] where i lc 0 , a', b' were the standard limiting current density, and the apparent limiting current order for O 2 and CO 2 , respectively.…”

“…In our previous study, the LaNiO 3 had extremely higher stability than NiO in molten carbonates (5,6). Though we had also studied fundamental research of LaNiO 3 for the oxygen reduction reaction (ORR) (7,8), its activity and mechanism for the ORR are not still clarified in detail.…”