A new method for synthesising oxyhydride materials
17 Jan 2019



Hydrogen-conducting materials have been widely studied for various technological applications, including proton conductors, high-temperature solid oxide fuel components and metals for hydrogen storage.


​​​The crystal structure of orthorhombic (Immm) La2LiHO3 as determined by x-ray diffraction. The atomic species are represented as lanthanum (green), lithium (pink), hydrogen (white), and oxygen (red).


Oxyhydrides, in which oxide and hydride anions share the same anionic lattice, are relatively rare compounds, and their synthesis is challenging. A team of researchers from the University of Oslo has used powder neutron diffraction experiments on Polaris and quasi-elastic neutron scattering measurements on Iris to develop a new method of synthesising La2LiHO3 that allows the production of larger quantities. They also reported, in detail, the conditions favouring high-quality high-yield samples of this material, which will be of considerable importance for further studies into its properties and potential practical applications in real devices.

Related publication: O. S. Fjellvag et al. “Thermal and Structural Aspects of the Hydride-Conducting Oxyhydride La2LiHO3 Obtained via a Halide Flux Method" Inorg. Chem. 56 (18)(2017), 11123–11128, DOI: 10.1021/acs.inorgchem.7b01409​

Contact: de Laune, Rosie (STFC,RAL,ISIS)