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Direct syntheses of Lan+1NinO3n+1 phases (n=1, 2, 3 and ∞) from nanosized co-crystallites |
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| Authors: | Xiaole Weng Paul Boldrin Isaac Abrahams Suela Kellici |
| Affiliation: | a Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, UK b Centre for Materials Research, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK c Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK d School of Engineering and Material Sciences, Queen Mary University of London, London E1 4NS, UK |
| Abstract: | A new direct route for the “bottom up” syntheses of phases in the Lan+1NinO3n+1 series (n=1, 2, 3 and ∞) has been achieved via single-step heat treatments of nanosized co-crystallized precursors. The co-crystallized precursors were prepared using a continuous hydrothermal flow synthesis system that uses a superheated water flow at ca. 400 °C and 24.1 MPa to produce nanoparticulate slurries. Overall, a significant reduction in time and number of steps for the syntheses of La3Ni2O7 and La4Ni3O10 was achieved compared with more conventional synthesis methods, which typically require multiple homogenization and reheating steps over several days. |
| Keywords: | Supercritical water Lan+1NinO3n+1 series Solid oxide fuel cell Continuous hydrothermal flow synthesis |
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