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In Situ IR Characterization of CO Interacting with Rh Nanoparticles Obtained by Calcination and Reduction of Hydrotalcite-Type Precursors
Joint Authors
Vaccari, A.
Bersani, I.
Fornasari, G.
Mortera, R.
Del Gallo, P.
Onida, B.
Fiorilli, S.
Gary, D.
Basile, F.
Source
International Journal of Spectroscopy
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-08-22
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Supported Rh nanoparticles obtained by reduction in hydrogen of severely calcined Rh/Mg/Al hydrotalcite-type (HT) phases have been characterized by FT-IR spectroscopy of adsorbed CO [both at room temperature (r.t.) and nominal liquid nitrogen temperature] and Transmission Electron Microscopy (TEM).
The effect of reducing temperature has been investigated, showing that Rh crystal size increases from 1.4 nm to 1.8 nm when the reduction temperature increases from 750°C to 950°C.
The crystal growth favours the formation of bridged CO species and linear monocarbonyl species with respect to gem-dicarbonyl species; when CO adsorbs at r.t., CO disproportionation occurs on Rh and it accompanies the formation of RhI(CO)2.
The role of interlayer anions in the HT precursors to affect the properties of the final materials has been also investigated considering samples prepared from silicate-instead of carbonate-containing precursors.
In this case, formation of RhI(CO)2 and CO disproportionation do not occur, and this evidence is discussed in terms of support effect.
American Psychological Association (APA)
Basile, F.& Bersani, I.& Del Gallo, P.& Fiorilli, S.& Fornasari, G.& Gary, D.…[et al.]. 2011. In Situ IR Characterization of CO Interacting with Rh Nanoparticles Obtained by Calcination and Reduction of Hydrotalcite-Type Precursors. International Journal of Spectroscopy،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-473096
Modern Language Association (MLA)
Basile, F.…[et al.]. In Situ IR Characterization of CO Interacting with Rh Nanoparticles Obtained by Calcination and Reduction of Hydrotalcite-Type Precursors. International Journal of Spectroscopy No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-473096
American Medical Association (AMA)
Basile, F.& Bersani, I.& Del Gallo, P.& Fiorilli, S.& Fornasari, G.& Gary, D.…[et al.]. In Situ IR Characterization of CO Interacting with Rh Nanoparticles Obtained by Calcination and Reduction of Hydrotalcite-Type Precursors. International Journal of Spectroscopy. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-473096
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-473096