Study of ruthenium in zeolite-y by x-ray photoelectron spectroscopy

Journal Article · Mon Dec 31 23:00:00 EST 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90337-1· OSTI ID:5379679

Pedersen, L A; Lunsford, J H

Ruthenium-exchanged NaY zeolites were studied with x-ray photoelectron spectroscopy in order to determine changes in the location and state of the Ru after subjecting the samples to both oxidizing and reducing environments. When O/sub 2/ was excluded from the system, ruthenium remained inside the zeolite cavities following reduction in H/sub 2/ and after the zeolite had catalyzed the methanation reaction. At elevated temperatures, before or after reduction, the presence of O/sub 2/ resulted in the formation of RuO/sub 2/ on the external surface of the zeolite. The peak intensity of the Ru 3d/sub 5/2/ line increased by more than a factor of five when the ruthenium migrated to the surface. Positive binding energy shifts of approximately 1 eV were detected for small clusters (<10 A) of reduced ruthenium when compared with larger metal particles within the zeolite or on its external surface. 22 references, 4 figures, 2 tables.

• Research Organization: Texas A and M Univ., College Station
• OSTI ID: 5379679
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
400201* -- Chemical &amp; Physicochemical Properties
400301 -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
BINDING ENERGY
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
DATA
DATA FORMS
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
EXPERIMENTAL DATA
FLUIDS
HYDROGEN
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOLATED VALUES
MECHANICAL STRUCTURES
METALS
METHANATION
MINERALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
REFRACTORY METALS
RUTHENIUM
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
SPECTROSCOPY
SUPPORTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS
ZEOLITES