Effect of Simultaneous Iso- and Heterovalent Doping on the Hydration and State of Oxygen-Hydrogen Groups in Block-Layer Complex Oxides Ba1+xLa1-xIn0.5Y0.5O4-0.5x

Complex oxides Ba1+xLa1-xIn0.5Y0.5O4-0.5x are obtained for the first time. The oxides are characterized by a Ruddlesden-Popper block-layered structure. It is found that the samples are capable of the dissociative absorption of water from the gas phase, and energetically nonequivalent OH- groups are the only form of oxygen-hydrogen groups. It is shown that the joint iso- and heterovalent doping of cationic sublattices with BaLaInO4 substantially raises the concentration of protons in the structure of hydrated samples, which could help in achieving proton transfer

Automated summary

Complex oxides Ba1+xLa1-xIn0.5Y0.5O4-0.5x with a Ruddlesden-Popper block-layered structure are successfully obtained for the first time. Dissociative absorption of water from the gas phase is observed, and energetically nonequivalent OH- groups are found to be the only form of oxygen-hydrogen groups. It is shown that joint iso- and heterovalent doping of cationic sublattices significantly enhances the proton concentration in hydrated samples, which is beneficial for proton transfer.