title: In situ XAFS analysis system for high-pressure catalytic reactions and its application to CO2 hydrogenation over a Rh/Y-zeolite catalyst.
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 carbon dioxide. The in-situ cell enabled analyses of the catalyst structures that changed with the reaction atmosphere and elapsed time; the peak assigned 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 increased corresponding to the increase in the catalytic activity.
authors.affiliation: National Institute of Materials and Chemical Research, Tsukuba, Ibaraki, Japan. bando@nimc.go.jp
authors.forename: K K
authors.initials: KK
authors.lastname: Bando
authors.forename: T
authors.initials: T
authors.lastname: Saito
authors.forename: K
authors.initials: K
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: F
authors.initials: F
authors.lastname: Dumeignil
authors.forename: M
authors.initials: M
authors.lastname: Imamura
authors.forename: N
authors.initials: N
authors.lastname: Matsubayashi
authors.forename: H
authors.initials: H
authors.lastname: Shimada