Title: A Metallic Room-Temperature Oxide Ion Conductor.
Authors: Heise, Martin; Rasche, Bertold; Isaeva, Anna; Baranov, Alexey I.; Ruck, Michael; Schäfer, Konrad; Pöttgen, Rainer; Eufinger, Jens-Peter; Janek, Jürgen
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 Bi3IrO x ( 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. Bi3IrO x is the first metallic oxide ion conductor and also the first that operates at room temperature.
Subjects: OXIDES; NANOPARTICLES; SEMICONDUCTOR doping; METALLIC oxides; PARTICLES (Nuclear physics)
Publication: Angewandte Chemie International Edition, 2014, Vol 53, Issue 28, p7344
ISSN: 1433-7851
Publication type: Academic Journal
DOI: 10.1002/anie.201402244

A Metallic Room-Temperature Oxide Ion Conductor.

Heise, Martin; Rasche, Bertold; Isaeva, Anna; Baranov, Alexey I.; Ruck, Michael; Schäfer, Konrad; Pöttgen, Rainer; Eufinger, Jens-Peter; Janek, Jürgen