XAFS STUDY OF THE STATE OF PLATINUM IN A SULFATED ZIRCONIA CATALYST

Authors
ZHAO J HUFFMAN GP DAVIS BH
Citation
J. Zhao et al., XAFS STUDY OF THE STATE OF PLATINUM IN A SULFATED ZIRCONIA CATALYST, Catalysis letters, 24(3-4), 1994, pp. 385-389
Citations number
17
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
24
Issue
3-4
Year of publication
1994
Pages
385 - 389
Database
ISI
SICI code
1011-372X(1994)24:3-4<385:XSOTSO>2.0.ZU;2-Q
Abstract
EXAFS and XANES data show that platinum, present in a Pt-SO4-ZrO2 cata lyst, exists in the metallic state following calcination in air at 725 degrees C for 2 h, and that no detectable change in the valence state of Pt occurs during use of the catalyst for hydrocarbon conversion at 150 degrees C under hydrogen pressure. The metallic Pt is present in reasonably large crystals where the average coordination number of Pt is about 12.