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Thermal Decomposition of Divanadium Pentoxide V2O5: Towards a Nanocrystalline V2O3 Phase

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Abstract

Thermal decomposition of V2O5 was studied by means of transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS). Samples were heated in a specimen chamber of an electron microscope up to 600 °C in vacuum at 10-7 Torr. TEM and EELS reveal a sequence of transformations from V2O5 via VO2 to V2O3, which differs from the electron-beam-induced reduction of V2O5. The phase transformation does not proceed topotactically. Our observation reveals that the initial thermal decomposition of V2O5 to V2O3 is followed by a combination of diffusion, coalescence, and stabilization processes. Our experiments open a new way for the preparation of single-crystalline V2O3 nano-particles.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195, Berlin, Germany

    D.S. Su & R. Schlögl

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  1. D.S. Su
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  2. R. Schlögl
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Su, D., Schlögl, R. Thermal Decomposition of Divanadium Pentoxide V2O5: Towards a Nanocrystalline V2O3 Phase. Catalysis Letters 83, 115–119 (2002). https://doi.org/10.1023/A:1021042232178

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