Investigation into Ca-Doped LaMnCoO3 Perovskite Oxides for Thermochemical Water Splitting

The study focuses on the development of perovskite oxide structured catalysts for a two-step thermochemical water splitting method that enables the sustainable production of hydrogen from renewable sources. Metal oxides with high redox capacity (_x-H₂), fast reaction kinetics and structural stability during thermal cycles are needed for efficient hydrogen production in this method, which is based on thermochemical processes that allow pure hydrogen to be produced alone. The low cost of metal oxides with these properties is also a requirement for their widespread use.

In this study, LaSrMnO₃ and LaCaMnO₃ based perovskite families were primarily doped with A-earth and B-earth elements and composition optimization was achieved with the focus of hydrogen production capacities. For this purpose, La_1-xSr_xMn_yAl_1-yO₃-SLMA (Sr=0.4-0.6, Al=0.4-0.6) and La_1-xCaxMn_yAl_1-yO₃-LCMA (Ca=0.4-0.8, Al=0.4-0.8), LCMF (Ca=0.4) A total of 36 different perovskite oxides containing compositions of Fe=0.4-0.8 and LCMC (Ca=0.4-0.8, Co=0.4-0.8) were synthesized and these compositions were evaluated using thermochemical redox reactions (Tred=~1400 °C, Tox=~800 °C).