Anti-sintering non-stoichiometric nickel ferrite for highly efficient and thermal-stable thermochemical CO2 splitting

Ca- and Ga-Doped LaMnO3 for Solar Thermochemical CO2 Splitting with High Fuel Yield and Cycle Stability

“…Therefore, when the Ca ratio increases from 0.2 to 0.4, the reaction will transfer from a surface reaction (F1) to the bulk diffusion reaction (D2) for large α. Therefore, it can be inferred that the diffusion-controlled reaction continues when the surface reaction finishes, benefiting CO 2 splitting, , leading to the high CO production of La 0.6 Ca 0.4 Mn 0.8 Ga 0.2 O 3 . By comparing La 0.6 Ca 0.4 MnO 3 with La 0.6 Ca 0.4 Mn 0.8 Ga 0.2 O 3 , it can be found that the dopant Ga does not change the reaction mechanism.…”

Remarkable solar thermochemical CO2 splitting performances based on Ce- and Al-doped SrMnO3 perovskites

“…Thus, the reaction kinetic model of solar thermochemical CO 2 splitting can be analyzed and obtained by tting solid-state kinetic theory with the master plot methods. 64,65 9. F1 and F2 models are dened as an instantaneous nucleation and unidimensional shape and bidimensional shape, respectively.…”

“…9b), the normalized CO production rate has the same trend as the second order reaction model (F2) at rst, and subsequently, when 0.5> a > 0.2, the reaction mechanism model begins to transform to the D1 model, and then when a > 0.5, the CO 2 splitting reaction is more inclined to the two-dimensional diffusion model (D2), showing that the oxidation reaction may occur in crystal lattices, in which molecular motion depends on lattice defects. 64,65 Compared to undoped SrMnO 3 , the kinetic reaction mechanism of SCMA20 has mainly changed from F1 to F2, indicating that the kinetic reaction rate can be enhanced by the increase of the reaction order n. Therefore, the ultrahigh CO yield and fast kinetics of SCMA20 can be mainly attributed to the transition from the rst-order reaction (F1) to the secondorder reaction (F2).…”

Platinum Group Metal Catalyst (RuOx, PtOx, and IrOx)-Decorated Ceria-Zirconia Solid Solution as High Active Oxygen Carriers for Solar Thermochemical CO2 Splitting

“…Solar thermochemical splitting of CO 2 into CO and O 2 is an attractive route to recycle CO 2 into hydrocarbon fuels or chemicals. − In two-step thermochemical CO 2 splitting (TCCS) cycle, the metal oxide (MO o x ) is first reduced at high temperatures (), then, the reduced metal oxide (MO red ) is re-oxidized to its initial state by CO 2 at relative lower temperatures (), where the MO ox and MO red represent oxidized and reduced metal oxides, respectively. The total net reaction of the abovementioned redox cycle is the splitting of CO 2 into CO and O 2 (). …”