Characterization of Ru-containing Zeolites by XAS
Angelia Sulaiman Lo (羅嘉雁)1, Pang-hung Liu (劉邦弘)1, Kuei-jung Chao (趙桂蓉)1,
Stefan Altwasser2, Roger Gläser2, and Jens Weitkamp2
1
2
Department of Chemistry, Tsing Hua University, Hsinchu, Taiwan
Institute of Chemical Technology, University of Stuttgart, Stuttgart, Germany
Ruthenium oxide particles were introduced into ZSM-5 (MFI type) by aqueous ion exchange
and hydrothermal zeolite synthesis methods in the presence or absence of tetrapropyl ammonium
ions as organic template. The local structure of ruthenium has been studied by XAS, PXRD, and
TEM characterization methods.
The aqueous ion exchange method leads to anhydrous ruthenium oxide with average particle
size of ~1.0 nm, while small hydrous ruthenium oxide particles with diameter ~0.6 nm are obtained
by template-free synthesis. Similar template-free method was applied to introduce ruthenium oxide
particles into FAU pores, which leads to hydrous ruthenium oxide with diameter ~1.3 nm. In the
presence of organic template (TPA), hydrous ruthenium oxide particles were introduced, but after
subsequent calcination, large anhydrous ruthenium oxide particles were obtained.