A Metallic Room‐Temperature Oxide Ion Conductor |
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| Authors: | Martin Heise Bertold Rasche Dr Anna Isaeva Dr Alexey I Baranov Prof?Dr Michael Ruck Konrad Schäfer Prof?Dr Rainer Pöttgen Jens‐Peter Eufinger Prof?Dr Jürgen Janek |
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| Affiliation: | 1. Fachrichtung Chemie und Lebensmittelchemie, Technische Universit?t Dresden, 01062 Dresden (Germany);2. Max Planck Institut für Chemische Physik fester Stoffe, N?thnitzer Strasse 40, 01187 Dresden (Germany);3. Institut für Anorganische und Analytische Chemie, Universit?t Münster, Corrensstrasse 30, 48149 Münster (Germany);4. Institut für Physikalische Chemie, Justus‐Liebig‐Universit?t Gie?en, Heinrich‐Buff‐Ring 58, 35392 Gie?en (Germany) |
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| Abstract: | Nanoparticles of Bi3Ir, obtained from a microwave‐assisted polyol process, activate molecular oxygen from air at room temperature and reversibly intercalate it as oxide ions. The closely related structures of Bi3Ir and Bi3IrOx (x≤2) were investigated by X‐ray diffraction, electron microscopy, and quantum‐chemical modeling. In the topochemically formed metallic suboxide, the intermetallic building units are fully preserved. Time‐ and temperature‐dependent monitoring of the oxygen uptake in an oxygen‐filled chamber shows that the activation energy for oxide diffusion (84 meV) is one order of magnitude smaller than that in any known material. Bi3IrOx is the first metallic oxide ion conductor and also the first that operates at room temperature. |
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| Keywords: | intermetallic phases ion conductors metastable compounds subvalent compounds topochemistry |
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