document: In conclusion, a new approach to the “grind-free” nanoprecursor route to direct combinatorial solid state synthesis of several “difficult to make” and hitherto unknown phase-pure heterometallic Ruddlesden Popper type La4Ni3−xFexO10 materials has been described. The new approach used a high-throughput reactor and robotic automation (RAMSI) to rapidly synthesise a range of nanoparticle co-precipitate precursors in cloned libraries at a rate of 7.5 samples an hour. Each library could then be heat-treated at a different temperature and an initial powder XRD screen was used to locate and approximate phase boundary. A more focussed second synthesis and XRD characterisation of selected larger heat-treated powders was then performed to reconfirm the locations of the phase boundaries with the highest dopant level being achieved for La4Ni2FeO10 which is significantly greater Fe doping than has been achieved by anyone previously (despite several notable efforts). EXAFS data suggested that Fe3+ was located onto Ni sites in all cases and did not exist as a separate iron oxide phase.
doc_bio_tags: O O O O O O O O O O O B I I I I O O O O O O O O O O O O O O O O O O O O O O O O O O B I B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O O O B I I I I O O O O B I I I O O O O O O O O O O O O O O O O O O O O O O O O B O O O O B O O O O O O O O O O O O B I O O O O O O B O O O O O O O O O O O B I O
extractive_keyphrases: direct combinatorial solid state synthesis exafs data fe iron oxide la4ni2feo10 locate and approximate phase boundary ni powder xrd screen ramsi robotic automation synthesis and xrd characterisation
abstractive_keyphrases: fe3+ “grind-free” nanoprecursor route heat-treated heat-treated powders high-throughput reactor nanoparticle co-precipitate precursors new approach to the “grind-free” nanoprecursor route to direct combinatorial solid state synthesis phase-pure heterometallic ruddlesden popper type la4ni3−xfexo10 materials rate of 7.5 samples an hour synthesise a range of nanoparticle co-precipitate precursors