Infrared study on the adsorption of CO and NO on silica-supported Pd and Pt-Pd

Journal Article · Thu Apr 17 04:00:00 EST 1980 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100445a018· OSTI ID:6321002

Grill, C M; Gonzalez, R D

The IR spectra of NO adsorbed on silica-supported palladium had bands at 1735 and 1645/cm, which were assigned to linearly bound NO and to NO linearly bound to low-coordinated palladium, respectively. Bands at 1980 and 2070/cm in the spectrum of CO adsorbed on palladium were assigned multiply coordinated and linear CO, respectively. Carbon monoxide was completely displaced from palladium by nitric oxide, preadsorbed nitric oxide was partly displaced from palladium by carbon monoxide, and carbon dioxide and nitrous oxide were formed in both processes. A band at 2180/cm provided evidence for adsorbed isocyanate species. All bands shifted to higher frequencies by approx. 10/cm for 1:1 palladium/platinum bimetallic clusters; the carbon monoxide was readily removed by evacuating at room temperature, a fact that my be used in catalyst surface area determinations.

• Research Organization: Univ. of Rhode Island
• OSTI ID: 6321002
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 84:8; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
ELEMENTS
INFRARED SPECTRA
METALS
MINERALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SPECTRA
SURFACE AREA
SURFACE PROPERTIES
TRANSITION ELEMENTS