Infrared and (super 23)Na double rotation nuclear magnetic resonance studies for intrazeolite anchoring of rhodium carbonyl clusters
Article Abstract:
Multianalysis approach consisting of Fourier transform infrared, (super 23)Na double rotation (DOR) nuclear magnetic resonance (NMR) spectroscopies and CO chemisorption are utilized for getting an insight into the formation process of zeolite clusters, interaction of the clusters with zeolite and the physiochemical characterizations, with special emphasize on the intrazeolite anchoring of rhodium carbonyl clusters. The patterns formed suggest the occurrence of a strong interaction between the oxygen end of the face-bridging Co ligands and the site II Na(super +) supercage cations.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Polymorphism in micro-, submicro-, and nanocrystalline NaNbO(sub 3)
Article Abstract:
A phase transformation induced by reduced particle size was investigated for NaNbO(sub 3) powders prepared through microemulsion-mediated synthesis and subsequent annealing treatment. The effect of particle structure on the phase transformation of the prepared NaNbO(sub 3) powders was studied using X-ray powder diffraction Raman spectroscopy, and nuclear site group based on these spectroscopic data and a possible mechanism of the phase transformation is suggested.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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In situ XANES study of Pt/Mordenite during benzene hydrogenation in the presence of thiophene
Article Abstract:
The effects on the activity and sulfur resistance of partially Na+ exchanged Pt supported on mordenite were studied by XAFS spectroscopy during benzene hydrogenation. Due to more significant H2S formation, an increase of sulfur poisoning of the metal surface by H2S with increasing the acid site concentration is observed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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