MgO-Supported Cluster Catalysts with Pt-Ru Interactions Prepared from Pt3Ru6(CO)21(u3-H)(u-H)3

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Catalysis Letters

DOI:https://doi.org/10.1007/s10562-007-9119-4· OSTI ID:929890

Chotisuwan, S; Wittapyakun, J; Lobo-Lapidus, R; Gates, B

Bimetallic MgO-supported catalysts were prepared by adsorption of Pt{sub 3}Ru{sub 6}(CO){sub 21}({mu}{sub 3}-H)({mu}-H){sub 3} on porous MgO. Characterization of the supported clusters by infrared (IR) spectroscopy showed that the adsorbed species were still in the form of metal carbonyls. The supported clusters were decarbonylated by treatment in flowing helium at 300 C, as shown by IR and extended X-ray absorption fine structure (EXAFS) data, and the resulting supported PtRu clusters were shown by EXAFS spectroscopy to have metal frames that retained Pt-Ru bonds but were slightly restructured relative to those of the precursor; the average cluster size was almost unchanged as a result of the decarbonylation. These are among the smallest reported bimetallic clusters of group-8 metals. The decarbonylated sample catalyzed ethylene hydrogenation with an activity similar to that reported previously for {gamma}-Al{sub 2}O{sub 3}-supported clusters prepared in nearly the same way and having nearly the same structure. Both samples were also active for n-butane hydrogenolysis, with the MgO-supported catalyst being more active than the {gamma}-Al{sub 2}O{sub 3}-supported catalyst.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 929890
• Report Number(s): BNL--80472-2008-JA
• Journal Information: Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 3 Vol. 115; ISSN CALEER; ISSN 1011-372X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BUTANE
CARBONYLS
CATALYST SUPPORTS
CATALYSTS
CHEMICAL PREPARATION
DEHYDROGENATION
MAGNESIUM OXIDES
PLATINUM COMPOUNDS
PRECURSOR
RUTHENIUM COMPOUNDS
national synchrotron light source