Molybdenum Oxide Nitrides of the Mo2(O,N,□)5 Type: On the Way to Mo2O5

Dominik Weber, Manop Huber, Tatiana E. Gorelik, Artem M. Abakumov, Nils Becker, Oliver Niehaus, Christian Schwickert, Sean P. Culver, Hans Boysen, Anatoliy Senyshyn, Rainer Pöttgen, Richard Dronskowski, Thorsten Ressler, Ute Kolb, Martin Lerch

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Blue-colored molybdenum oxide nitrides of the Mo2(O,N,□)5 type were synthesized by direct nitridation of commercially available molybdenum trioxide with a mixture of gaseous ammonia and oxygen. Chemical composition, crystal structure, and stability of the obtained and hitherto unknown compounds are studied extensively. The average oxidation state of +5 for molybdenum is proven by Mo K near-edge X-ray absorption spectroscopy; the magnetic behavior is in agreement with compounds exhibiting MoVO6 units. The new materials are stable up to ∼773 K in an inert gas atmosphere. At higher temperatures, decomposition is observed. X-ray and neutron powder diffraction, electron diffraction, and high-resolution transmission electron microscopy reveal the structure to be related to VNb9O24.9-type phases, however, with severe disorder hampering full structure determination. Still, the results demonstrate the possibility of a future synthesis of the potential binary oxide Mo2O5. On the basis of these findings, a tentative suggestion on the crystal structure of the potential compound Mo2O5, backed by electronic-structure and phonon calculations from first principles, is given.

Original languageEnglish
Pages (from-to)8782-8792
Number of pages11
JournalInorganic Chemistry
Volume56
Issue number15
DOIs
Publication statusPublished - 7 Aug 2017

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