> Merkliste Sie können Bookmarks mittels Listen verwalten, loggen Sie sich dafür bitte in Ihr SLUB Benutzerkonto ein.
Medientyp: E-Artikel Titel: Indirect Raman identification of the proton insertion in the high‐temperature [Ba/Sr][Zr/Ti]O3‐modified perovskite protonic conductors Beteiligte: Slodczyk, Aneta; Colomban, Philippe; Willemin, Stephanie; Lacroix, Olivier; Sala, Beatrice Erschienen: Wiley, 2009 Erschienen in: Journal of Raman Spectroscopy, 40 (2009) 5, Seite 513-521 Sprache: Englisch DOI: 10.1002/jrs.2157 ISSN: 0377-0486; 1097-4555 Entstehung: Anmerkungen: Beschreibung: <jats:title>Abstract</jats:title><jats:p>OH<jats:sup>−</jats:sup> and H<jats:sub>3</jats:sub>O<jats:sup>+</jats:sup> species in hydrates and simple oxides are rather well characterised from their IR, Raman and inelastic neutron points of view. For the H<jats:sup>+</jats:sup> (H<jats:sub>2</jats:sub>O) species in solid state the variability is well established and assignment remains discussed. The question of the vibrational signature of isolated proton (e.g. the ionic proton, a proton sharing its interaction with more than two acceptors) and its dynamic nature (proton gas, polaron,…) is open. H<jats:sup>+</jats:sup>‐containing modified perovskites A(Ba,Sr,…) B(Zr,Ce,Ti,…) O<jats:sub>3</jats:sub> are potential ceramic membranes for fuel cell and medium temperature water electrolysis (300–800 °C). Comparison studies of the protonated and non‐protonated lanthanide/rare earth‐modified perovskites of type Ba(Sr)Zr(Ti)O<jats:sub>3</jats:sub> as well as Al‐modified BaTiO<jats:sub>3</jats:sub> show that a broad component centred at 2500 cm<jats:sup>−1</jats:sup> is observed after ‘proton insertion’. Its intensity is correlated to the protonic species content as well as to the conductivity of the materials. The mixed nature of this feature is discussed: fluorescence related to the dangling bonds, A, B, C bands or new phenomena related to the ionic protons and associated electronic defect. Copyright © 2008 John Wiley & Sons, Ltd.</jats:p>