X-RAY-ABSORPTION SPECTROSCOPIC CHARACTERI ZATION OF CATALYST FOR ABATEMENT OF POLLUTION PRODUCED BY AUTOMOTIVE-TYPE GAS-MIXTURES

Authors
PITCHON V HOWITT C MAIRE F BERNHARDT P BAZIN D MAIRE G
Citation
V. Pitchon et al., X-RAY-ABSORPTION SPECTROSCOPIC CHARACTERI ZATION OF CATALYST FOR ABATEMENT OF POLLUTION PRODUCED BY AUTOMOTIVE-TYPE GAS-MIXTURES, Journal de physique. IV, 6(C4), 1996, pp. 967-973
Citations number
8
Categorie Soggetti
Physics
Journal title
Journal de physique. IV → ACNP
ISSN journal
11554339
Volume
6
Issue
C4
Year of publication
1996
Pages
967 - 973
Database
ISI
SICI code
1155-4339(1996)6:C4<967:XSCZOC>2.0.ZU;2-9
Abstract
The operation of an alumina supported Pt-Rh three-way catalyst has bee n studied under oscillating gas mixtures. An in situ EXAFS study of th e catalyst has shown that there is a transient deactivation during the oxidising excursion associated with the rhodium component which becom es partially oxidised to its inactive form Rh2O3. The platinum, on the other hand, remains reduced during the course of the reaction and is able to maintain the activity in an oxidising environment.