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Hydrogenation of carbon monoxide over nanostructured systems: a mechanochemical approach

Mulas, Gabriele Raimondo Celestino and Campesi, Renato and Garroni, Sebastiano and Delogu, Francesco and Milanese, Chiara (2011) Hydrogenation of carbon monoxide over nanostructured systems: a mechanochemical approach. Applied Surface Science, Vol. 257 (19), p. 8165-8170. eISSN 1873-5584. Article.

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DOI: 10.1016/j.apsusc.2011.03.024

Abstract

In this study we investigated the mechanochemical hydrogenation of carbon monoxide over nanostructured FeCo- and Mg2Ni-based catalysts. To this aim powdered materials, prepared by mechanical alloying, were subjected to mechanical treatment under CO + H2 atmosphere. A methodology to evaluate the activity of the solid catalysts on an absolute basis was developed. Conversion data were, indeed, expressed as turnover frequency, TOF, and related to the occurrence of ball to powder collision events through the mechanochemical turnover frequency parameter, MTOF. Differences in the catalytic activity and selectivity were observed for the two FeCo-based studied systems, the solid solution Fe50Co50 and its dispersion on TiO2 support. As for the Mg2Ni system, we explored the possibility to estimate the specific role of hydrogen pre-activation step. The catalytic properties of the mechanically alloyed Mg2Ni system were compared with the conversion data shown by the same system pre-hydrogenated and subsequently milled under CO atmosphere.

Item Type:Article
ID Code:6091
Status:Published
Refereed:Yes
Uncontrolled Keywords:Mechanochemical process, nanostructured catalysts, carbon monoxide hydrogenation
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > INSTM-Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Unità di ricerca di Sassari
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier Science
eISSN:1873-5584
Copyright Holders:© 2011 Elsevier
Additional Information:E-MRS2010 Fall Meeting Symposium F: "10th International Symposium on Electrochemical/Chemical Reactivity of Metastable Materials", 13–17 September 2010, Warsaw, Poland, edited by Hiroki Habazaki, Maria Janik-Czachor and Paweł J. Kulesza
Deposited On:30 May 2011 08:49

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