In situ XAFS analysis system for high-pressure catalytic reactions and itsapplication to CO2 hydrogenation over a Rh/Y-zeolite catalyst

Citation
Kk. Bando et al., In situ XAFS analysis system for high-pressure catalytic reactions and itsapplication to CO2 hydrogenation over a Rh/Y-zeolite catalyst, J SYNCHROTR, 8, 2001, pp. 581-583
Citations number
3
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SYNCHROTRON RADIATION
ISSN journal
0909-0495 → ACNP
Volume
8
Year of publication
2001
Part
2
Pages
581 - 583
Database
ISI
SICI code
0909-0495(200103)8:<581:ISXASF>2.0.ZU;2-0
Abstract
An in-situ XAFS cell was developed and used for the structural analysis of a Rh ion-exchanged zeolite catalyst during high-pressure hydrogenation of c arbon dioxide. The in-situ cell enabled analyses of the catalyst structures that changed with the reaction atmosphere and elapsed time; the peak assig ned to Rh-O scattering changed to that assigned to Rh-Rh scattering at 404 K during the pretreatment by hydrogen. After 30 min. of the carbon dioxide hydrogenation reaction, the peak intensity assigned to Rh-Rh scattering inc reased corresponding to the increase in the catalytic activity.