|
|||||
|
|
Direct Imaging of Octahedral Distortion in a Complex Molybdenum Vanadium Mixed Oxide |
|
| Authors: | Dr Thomas Lunkenbein Dr Frank Girgsdies Anna Wernbacher Dr Johannes Noack Dr Gudrun Auffermann Akira Yasuhara Achim Klein‐Hoffmann Prof Wataru Ueda Dr Maik Eichelbaum Dr Annette Trunschke Prof Robert Schlögl Dr Marc G Willinger |
| Institution: | 1. Department of Inorganic Chemistry, Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany);2. Max Planck Institut für Chemische Physik Fester Stoffe, N?thnitzer Stra?e 40, 01187 Dresden (Germany);3. Jeol Ltd. Tokyo (Japan);4. Catalysis Research Center, Hokkaido University, Sapporo (Japan);5. Max‐Planck‐Institut für Chemische Energiekonversion, Stiftstrasse 34–36, 45470 Mülheim an der Ruhr, Germany |
| Abstract: | Complex Mo,V‐based mixed oxides that crystallize in the orthorhombic M1‐type structure are promising candidates for the selective oxidation of small alkanes. The oxygen sublattice of such a complex oxide has been studied by annular bright field scanning transmission electron microscopy. The recorded micrographs directly display the local distortion in the metal oxygen octahedra. From the degree of distortion we are able to draw conclusions on the distribution of oxidation states in the cation columns at different sites. The results are supported by X‐ray diffraction and electron paramagnetic resonance measurements that provide integral details about the crystal structure and spin coupling, respectively. |
| Keywords: | annular bright field microscopy bond angles electron microscopy light elements transmission electron microscopy |