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Probing a Redox Behavior of TiO2/SBA-15 Supported VxOy Catalyst Using an Electron Beam in a 200 kV Transmission Electron Microscope

MPG-Autoren
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Zhang,  Wei
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Zhang,  Bingsen
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Wolfram,  Till
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Shao,  Lidong
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science;

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Zitation

Zhang, W., Zhang, B., Wolfram, T., Shao, L., Schlögl, R., & Su, D. S. (2011). Probing a Redox Behavior of TiO2/SBA-15 Supported VxOy Catalyst Using an Electron Beam in a 200 kV Transmission Electron Microscope. The Journal of Physical Chemistry C, 115(42), 20550-20554. doi:10.1021/jp2058645.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0012-0CB5-2
Zusammenfassung
Supported vanadium oxides are becoming the model catalysts for numerous selective oxidation reactions. To exploit redox chemistry of well-known titania-supported vanadia is currently one of the most fascinating topics. Herein, by applying in situ electron energy-loss spectroscopy, we succeeded in stimulating a new redox reaction in a routine transmission electron microscope; the electron beam can boost further oxidation from an amorphous lower-oxidation-state vanadia to maximal V2O5 with an expense of oxygen from its support of TiO2 to be reduced. Our findings could be extended into a new strategy: through utilizing an electron beam, and probing the redox chemistry between catalysts and their support in a wide class of heterogeneous catalyst systems, such as various oxide/oxide, metal/oxide, and oxide/metal catalysts.