Probing a redox behavior of TiO/SBA-15 Supported V O catalyst using an electron beam in a 200 kv transmission electron microscope
Journal of Physical Chemistry C, ISSN: 1932-7447, Vol: 115, Issue: 42, Page: 20550-20554
2011
- 13Citations
- 23Captures
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Article Description
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 VO with an expense of oxygen from its support of TiO 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. © 2011 American Chemical Society.
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