NDLI: Combined Zr and S XANES Analysis on S–ZrO$

Content Provider	Springer Nature Link
Author	Liu, Changchang Bolin, Trudy rthrup, Paul Lee, Sungchul McEnally, Charles Kelleher, Patrick Pfefferle, Lisa Haller, Gary L.
Copyright Year	2013
Abstract	Sulfated zirconia (S–ZrO$_{2}$) is a versatile solid acid catalyst that has wide application in hydrocarbon conversion reactions. In our previous work, we have developed well-dispersed ZrO$_{2}$ nanoparticles supported on multi-walled carbon nanotubes (MWCNT) to form a ZrO$_{2}$/MWCNT composite, which, upon sulfation, becomes a S–ZrO$_{2}$/MWCNT solid acid catalyst. While X-ray absorption spectroscopy (XAS) of this composite at the C, O, Zr K-edges has been well studied in our previous reports, XAS at the S K-edge is complicated by the Zr L-edges that bracket the S K-edge. In this study, we have used conventional S XANES, together with first-derivative and third-derivative analysis, to probe the sulfur species formed during the catalyst preparation and their interaction with Zr. We have also designed combined Zr and S XANES, which spans 400 eV and covers all three Zr L-edges and the S K-edge, to study the Zr and S interaction. Such use of multiple-edge XANES to study the S–ZrO$_{2}$ system at low X-ray energy (2,200–2,600 eV) was first reported in the previous publication of our research group, and in this paper we elaborate on the comprehensive study of our catalyst system using this method.
Starting Page	693
Ending Page	705
Page Count	13
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	57
Issue Number	6-9
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2013-12-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	S XANES First-derivative Analysis Third-derivative analysis Multiple-edge XANES Sulfated zirconia Solid acid catalyst Catalysis Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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