Determination of oxygen sites in the crystal structure of A-site deficient Pr2-xNiO4±delta (x: 0, 0.05, 0.1, 0.15, 0.2) as a function of pO2 and temperature

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4.5 HZB 21.11151/in72-paru :unav Determination of oxygen sites in the crystal structure of A-site deficient Pr2-xNiO4±delta (x: 0, 0.05, 0.1, 0.15, 0.2) as a function of pO2 and temperature Helmholtz-Zentrum Berlin für Materialien und Energie 2022 Schumacher, Gerhard Gerhard Schumacher Scherb, Tobias Tobias Scherb Ning, De De Ning Ruhl, Rian Rian Ruhl Zhou, Dong Dong Zhou Ruhl, Rian Rian Ruhl Schumacher, Gerhard Gerhard Schumacher Scherb, Tobias Tobias Scherb Ning, De De Ning Zhang, Li Li Zhang Helmholtz-Zentrum Berlin für Materialien und Energie 02aj13c28 2017-05-23T06:00:00Z/2017-05-29T07:48:26Z 2022-05-29T07:48:26Z Investigation 171-04979-1.1-N 10.5442/NI000002 804.32 MiB Creative Commons Zero v1.0 Universal The Ruddlesden-Popper type Pr2-xNiO4±delta is one of the most potential membrane materials for the design of intermediate temperature solid oxide fuel cell cathodes and oxygen separation membranes due to their extremely high oxygen diffusivity. A-site deficiency improves the oxygen diffusivity in the Pr2-xNiO4±delta, which may be caused by a lower diffusion barrier for oxygen atoms at the A-site. The composition of Pr2-xNiO4±delta (x=0.0, 0.5, 1.0, 1.5, 2.0) at maximum oxygen mobility is known only roughly until now, and the oxygen diffusion mechanism of this material is also not clear. In this work, nuclear density maps based on neutron diffraction will be created at for different A-site deficiencies, the oxygen sites will be determined based on Rietveld refinement. 10.5442/NI000002 E9 - Fine Resolution Powder Diffractometer (FIREPOD)