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Crystal structure of lanthanum molybdenum tungstate membrane elucidated by Transmission Electron Microscopy

Collaborative work between ER-C und IEK-1 published in Scientific Reports 9, 3274 (2019)

Scientific Reports 9, Article number: 3274 (2019) K.Ran et.alCopyright: Forschungszentrum Jülich GmbH

Lanthanum tungstate (LWO) substituted by molybdenum which is a promising candidate material for hydrogen separation membranes has been synthesized at IEK-1 and investigated by high-resolution Transmission Electron Microscopy at Ernst-Ruska Center. Energy-dispersive X-ray chemical mapping allowed direct visualization of individual atomic columns, and revealed that all Mo is located at the W1 sites in the Mo-substituted LWO. Moreover, the diffuse scattering in diffraction patterns provides direct evidence of short range clustering of oxygen vacancies and could be further related to the oxygen conduction of the LWO membranes. More information can be found at: