Citation for published item:quti¡ errez eij sD tuli nd r doEqonj lD tes¡ us nd ¡ evil fr ndeD h vid nd erryD s n nd wor¡ nD imilio nd hmidtD iner @PHIUA 9wi row veE ssisted synthesisD mi rostru tureD nd m gneti properties of r reEe rth o ltitesF9D snorg ni hemistryFD ST @IAF ppF TPUETQQF Further information on publisher's website:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Inorganic Chemistry, copyright c 2016 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see https://doi.org/10.1021/acs.inorgchem.6b02557. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe series of perovskite rare-earth (RE) doped cobaltites (RE)CoO3 (RE = La -Dy) was prepared by microwave-assisted synthesis. The crystal structure undergoes a change of symmetry depending on the size of the RE cation. LaCoO3 is rhombohedral, S.G. , while for the rest of the RE series (Pr -Dy) the symmetry is orthorhombic, S.G. Pnma (No. 62). The crystal structure obtained by X-Ray diffraction was confirmed by high resolution transmission electron microscopy, which yielded a good match between experimental and simulated images. It is further shown that the well-known magnetism in LaCoO3, which involves a thermally induced Co 3+ (d 6 ) low spin to intermediate or high spin state transition, is strongly modified by RE-doping and a rich variety of magnetic order has been detected across the series.

Since electrode materials play a crucial role in the performance of supercapacitors, the design of architectures based on carbon nanocomposites can enhance the electrochemical performance based on the synergistic effect between the components. Here, we have devised a facile synthetic route for the preparation of a C/Au nanocomposite, denoted as carbon/gold nanograpes (C/Au NGs), based on the hydrothermal polymerization of glucose-stabilized gold nanoparticles. Carbonization/activation of the C/Au NGs at 500 °C yields microporous carbon nanospheres containing several Au nanoparticles, giving a high volumetric capacitance. However, this volumetric capacitance suffers a dramatic drop at fast charge/discharge rates. When heating the C/Au NGs at 700 °C, the Au nanoparticles melt and flow out of the carbon nanospheres, altering the micropore structure of the C/Au NGs shells, and recrystallize at the surface, while some nanoclusters containing only a few Au atoms remained homogeneously dispersed within the pore network of the carbon shell. These nanostructural changes result in an increase in the ionic transport rates across the carbon shell as well as a lowering of the resistance, thus increasing the volumetric capacitance in aqueous acidic solutions and showing a remarkable improvement in the capacitance retention.

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

No abstract