STATE OF PLATINUM IN ZIRCONIA AND SULFATED ZIRCONIA CATALYSTS

Authors
SRINIVASAN R SPARKS DE DAVIS BH
Citation
R. Srinivasan et al., STATE OF PLATINUM IN ZIRCONIA AND SULFATED ZIRCONIA CATALYSTS, Catalysis letters, 40(3-4), 1996, pp. 167-173
Citations number
24
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
40
Issue
3-4
Year of publication
1996
Pages
167 - 173
Database
ISI
SICI code
1011-372X(1996)40:3-4<167:SOPIZA>2.0.ZU;2-Y
Abstract
Platinum is present in a metallic state following activation in air at 725 degrees C of both 5 wt% Pt/ZrO2 and 5 wt% Pt/SO42-/ZrO2. Reductio n of either catalyst at 725 degrees C produces a Pt-Zr alloy, and thes e reduced catalysts, upon recalcination in air at 725 degrees C, form metallic Pt crystallites. Likewise, reduction of these uncalcined cata lysts at 725 degrees C in H-2 leads to a Pt-Zr alloy formation. Howeve r, treatment of these uncalcined catalysts in H-2 at 450 degrees C doe s not produce Pt crystallites large enough to detect by XRD.