Palladium carbonyl clusters entrapped in NaY zeolite cages: Ligand dissociation and cluster-wall interactions

Journal Article · Wed Oct 11 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00203a010· OSTI ID:6712780

Sheu, Lienlung; Knoezinger, H; Sachtler, W M.H. ^[1]

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1. Northwestern Univ., Evanston, IL (USA)

Highly structured FTIR spectra, which are indicative of Pd carbonyl clusters, are obtained after adsorption of CO on Pd/NaY which was reduced at 200{degree}C, but broad IR bands are observed with samples which were reduced at higher temperatures. Pd carbonyl clusters with only CO ligands have not been reported previously, which indicates that the geometry of NaY supercages favors their formation. As the clusters lose some of their CO ligands, old IR bands erode and new IR bands with sharp isosbestic points emerge. This process is entirely reversed upon reintroduction of CO. The low activation energy of CO release and concomitant changes in the IR band characteristic of zeolite O-H vibrations indicate a chemical interaction of zeolite protons and Pd carbonyl clusters.

• OSTI ID: 6712780
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:21; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400200* -- Inorganic
Organic
& Physical Chemistry
BONDING
CALCULATION METHODS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CHALCOGENIDES
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
INFORMATION
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
INTERFACES
ION EXCHANGE MATERIALS
JOINING
LIGANDS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
MINERALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
SPECTRA
TRANSITION ELEMENTS
ZEOLITES