O2-release from carbon-bearing Ni(II) ferrite (CBNF) was studied with TG-MS and DSC. Release of lattice oxygen as O2 was found to take place at 200–300°C and was associated with an endothermic temperature peak. The proposed thermochemical reaction is Olat.(s) = Vö(s) + (12) O2(g), ΔH° =...

Water splitting with Mn(II) ferrites (MnFe2O4, Mn0.5Fe2.5O4) and CaO at 1273K has been studied. The process accompanies a phase change and a calcium-manganese oxide (Cax(Fe,Mn)yOz) is formed. For CaO/MnFe2O4 mole ratios above 3, a single phase of Ca3(Fe2.02/3,Mn0.98/3)3O7.02 with crystal...