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Image Of The Week - 09/29/2006
This image shows the HR-TEM of a 12 W/nm2
WO3/ZrO2 catalyst which depicts
both the WO3 and the underlying ZrO2 support. This image confirms the
presence of a monolayer polymeric surface WO5 species with
WO3 nanoparticles
(NPs) forming in small clusters(~1-2 nm). This catalyst is formed by the
incipient wetness impregnation method of ammonium metatungstate and a
preformed ZrO2 support. The formation of the small WO3 NPs on top of the
WOx
monolayer has been found to increase the acid activity of methanol
dehydration.
Image provided by: E.I. Ross, T. Kim, C. Kiely, A. Burrows, W.V. Knowles,
M.S. Wong and I.E. Wachs.
Copyright © 2006 E.I. Ross, T. Kim, C. Kiely, A.
Burrows, W.V. Knowles,
M.S. Wong, I.E. Wachs, and Lehigh University. This image and information
may not be reproduced without the prior consent of this website
administrator or the image author.
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