A Metallic Room‐Temperature Oxide Ion Conductor1. Issue 28 (27th May 2014)

• Record Type: Journal Article
• Authors: Heise, Martin; Rasche, Bertold; Isaeva, Anna; Baranov, Alexey I.; Ruck, Michael; Schäfer, Konrad; Pöttgen, Rainer; Eufinger, Jens‐Peter; Janek, Jürgen
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 28(2014)
• Page Start: 7344
• Page End: 7348
• Publication Date: 2014-05-27
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201402244
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 Bi₃IrO_{<italic>x</italic>} (<italic>x</italic>≤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. Bi₃IrO_{<italic>x</italic>} is the first metallic oxide ion conductor and also the first that operates at room temperature.</p> </abstract>