Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confetd05p&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Physics
Matrix/Condensed Phase
Scientific paper
In a preliminary study, the reaction of CO successive hydrogenation has been performed at 3 and 10 K using a co-injection technique. A H/H_2 mixture and CO molecules are codeposited on a cold mirror and hydrogen atoms are reacting step by step with CO as follows : CO → HCO → H_2CO → H_3CO → CH_3OH At 3 K, CO hydrogenation is limited to the first step of the reaction. However, when the reaction is performed at 10 K, CO hydrogenation is total and all intermediates are observed in the IR spectra. The aim of this present work is to understand the influence of the environment in which the reaction takes place, in order to determine the best conditions promoting CO hydrogenation. Indeed, the catalytic potential of water molecules on CO hydrogenation has been more specifically studied. In this experiment, mixtures of (CO,H_2O) and H/H_2 are co-injected at various concentrations and in a temperature range between 3 and 20 K. It is clear that water environements induce noticeable changes by increasing the chemical reaction rate and promoting HCO conversion into H_2CO.
Krim Lahouari
Pirim C.
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