Open AccessIn situ XAFS analysis system for high‐pressure catalytic reactions and its application to CO 2 hydrogenation over a Rh/Y‐zeolite catalyst
Author(s) -
Bando Kyoko K.,
Saito Takeru,
Sato Koichi,
Tanaka Tomoaki,
Dumeignil Franck,
Imamura Motoyasu,
Matsubayashi Nobuyuki,
Shimada Hiromichi
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500014382
Subject(s) - catalysis , x ray absorption fine structure , chemistry , zeolite , hydrogen , in situ , scattering , inorganic chemistry , rhodium , analytical chemistry (journal) , organic chemistry , spectroscopy , physics , quantum mechanics , optics
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.