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A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La4Ni2FeO10-delta

Alexander, SJ; Lin, T; Brett, DJL; Evans, JRG; Cibin, G; Dent, A; Sankar, G; (2012) A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La4Ni2FeO10-delta. Solid State Ionics , 225 176 - 181. 10.1016/j.ssi.2012.04.027. Green open access

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Abstract

We describe a simple nanoprecursor route for direct solid-state combinatorial synthesis and discovery of heterometallic materials compositions which are normally difficult to make in a single step. Using a combinatorial robot (incorporating a continuous hydrothermal reactor), co-precipitated nanoprecursors containing different amounts of La, Ni and Fe oxides were made. These samples were divided into two identical cloned libraries, which were heat-treated to bring about solid-state transformations at either 1348 K or 1573 K for 12 h. In each case, experimental conditions were designed to form the corresponding La4Ni3 − xFexO10 phases (x = 0.0–3.0) directly without comminution. Such materials are difficult to make without multiple heating and grinding steps. The heat-treated samples from each library were embedded into a wellplate and analysed by powder X-ray diffraction methods in order to elucidate trends in phase behaviour. Several hitherto unknown phase-pure Ruddlesden Popper type La4Ni3 − xFexO10 compositions were identified and their DC electrical conductivities measured.

Type: Article
Title: A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La4Ni2FeO10-delta
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ssi.2012.04.027
Publisher version: http://dx.doi.org/10.1016/j.ssi.2012.04.027
Language: English
Additional information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: Continuous hydrothermal flow synthesis, Combinatorial, High-throughput, Ruddlesden Popper
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: http://discovery.ucl.ac.uk/id/eprint/1353094
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