An infrared study of the influence of CO adsorption on the topology of supported ruthenium

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90011-0· OSTI ID:6845263

Solymosi, F; Rasko, J ^[1]

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1. Univ. of Szeged (Hungary)

The interaction of CO with alumina-supported ruthenium, reduced at different temperatures, was investigated by following the development of infrared bands due to adsorbed CO. It was concluded that the adsorption of Co on Ru at 170-350 K leads to the oxidative disruption of Ru clusters as indicated by the slow transformation of the band at 2020-2040 cm{sup {minus}1} due to Ru{sub x}-CO to bands at 2140 and 2075 cm{sup {minus}1} attributed to Ru{sup n+}(CO){sub 2} species (n = 1-3). This process occurred more slowly under dry conditions, and in the presence of hydrogen, whereas it was accelerated by H{sub 2}O addition. Analysis of spectral features suggested the involvement of the isolated OH groups on the alumina support in the oxidative disruption process. It was demonstrated that at higher temperatures, namely at around 500 K, the presence of CO causes the reductive agglomeration of Ru{sup n+} sites, i.e., the reformation of Ru{sub x} clusters.

• OSTI ID: 6845263
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 115:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ADSORPTION
AGGLOMERATION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTIONS
COMPLEXES
ELEMENTS
INFRARED SPECTRA
METALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REDUCTION
RUTHENIUM
RUTHENIUM COMPLEXES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS