Journal
NATURE CHEMISTRY
Volume 1, Issue 9, Pages 722-728Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.433
Keywords
-
Categories
Funding
- National Science Foundation [0609018]
Ask authors/readers for more resources
Tungstated zirconia is a robust solid acid catalyst for light alkane (C-4-C-8) isomerization. Several structural models for catalytically active sites have been proposed, but the topic remains controversial, partly because of the absence of direct structural imaging information on the various supported WO x species. High-angle annular dark-field imaging of WO3/ZrO2 catalysts in an aberration-corrected analytical electron microscope allows, for the first time, direct imaging of the various species present. Comparison of the relative distribution of these WO x species in materials showing low and high catalytic activities has allowed the deduction of the likely identity of the catalytic active site-namely, subnanometre Zr-WOx clusters. This information has subsequently been used in the design of new catalysts, in which the activity of a poor catalyst has been increased by two orders of magnitude using a synthesis procedure that deliberately increases the number density of catalytically relevant active species.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available