INFLUENCE OF PLATINUM ON CERIA SULFATION

Authors
BAZIN P SAUR O LAVALLEY JC BLANCHARD G VISCIGLIO V TOURET O
Citation
P. Bazin et al., INFLUENCE OF PLATINUM ON CERIA SULFATION, Applied catalysis. B, Environmental, 13(3-4), 1997, pp. 265-274
Citations number
20
Journal title
Applied catalysis. B, Environmental → ACNP
ISSN journal
09263373
Volume
13
Issue
3-4
Year of publication
1997
Pages
265 - 274
Database
ISI
SICI code
0926-3373(1997)13:3-4<265:IOPOCS>2.0.ZU;2-D
Abstract
The influence of platinum on ceria sulfation has been studied using th ermogravimetry and infrared spectroscopy. The same types of sulfate sp ecies - surface and bulk-like species - are evidenced with or without Pt. Pt does not modify the thermal stability of both types of sulfate. It favors sulfate formation on low-surface-area CeO2 samples. The red ucibility of sulfate by H-2 is promoted by Pt irrespective of the type s of sulfate formed on ceria. H2S, which is formed by H-2 reduction of sulfate, partly remains on the catalyst. It is adsorbed not only on t he oxide but also on Pt. Sulfur poisoning of Pt has been shown by IR s tudy of CO adsorption. (C) 1997 Elsevier Science B.V.