Infrared study of NO and CO adsorption on a silica-supported Ru catalyst

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(77)90273-1· OSTI ID:5447567

Davydov, A A; Bell, A T

Infrared spectra were obtained for NO and CO adsorbed on reduced and oxidized Ru supported on silica. Adsorption of NO on a fully reduced sample produced bands at 1810 and 1860 cm/sup -1/. With prolonged catalyst exposure to NO, the latter band shifted to higher frequencies. Spectra of NO adsorbed on an oxidized sample showed only a single band at 1880 cm/sup -1/. Both the band at 1810 cm/sup -1/ and that occurring between 1860 and 1880 cm/sup -1/ are assigned to NO adsorbed as NO/sup +/. The low frequency band is associated with adsorption on partially oxidized Ru sites and the high frequency band with adsorption on more fully oxidized sites. On a fully reduced sample, CO adsorption produced a single band at 2040 cm/sup -1/ which is assigned to linearly bonded CO. Oxidation of Ru and subsequent adsorption of CO produced bands at 2130 and 2070 cm/sup -1/. This pair of bands is assigned to the symmetric and asymmetric stretches of two CO molecules bonded to a single oxidized Ru site.

• Research Organization: Univ. of California, Berkeley
• OSTI ID: 5447567
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 49:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EXHAUST GASES
GASEOUS WASTES
INFRARED SPECTRA
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFRACTORY METALS
RUTHENIUM
SORPTION
SORPTIVE PROPERTIES
SPECTRA
TRANSITION ELEMENTS
WASTES