Adsorption of formaldehyde on the Ru(001) and Ru(001)-p(2x2)O surfaces

Journal Article · Wed Apr 16 04:00:00 EST 1986 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00268a019· OSTI ID:5532666

Anton, A B; Parmeter, J E; Weinberg, W H

The adsorption of formaldehyde on the clean Ru(001) surface and a Ru(001) surface on which an ordered p(2x2) overlayer of oxygen adatoms is present has been investigated via high resolution electron energy loss vibrational spectroscopy and thermal desorption mass spectrometry. On the clean Ru(001) surface, the formaldehyde surface bonding interaction at 80 K is primarily via ..pi..Co donation and ..pi../sub CO/* backdonation, leading to decomposition to adsorbed hydrogen and CO for low exposures. With subsequent exposure to formaldehyde, a small fractional surface coverage (theta = 0.02-0.03) of eta/sup 2/-formyl is observed, followed by formation of eta/sup 2/-formaldehyde (theta = 0.10) and eta/sup 1/-formaldehyde at saturation (monolayer) coverage. Upon heating, the eta/sup 2/-formyl decomposes to adsorbed hydrogen and CO by 120 K, and the eta/sup 1/-formaldehyde desorbs molecularly between 130 and 180 K. Further heating decomposes the remaining eta/sup 2/-formaldehyde, and thermal desorption measurements indicate that a total of a quarter monolayer of formaldehyde decomposes on the Ru(001) surface under these conditions.

• Research Organization: California Institute of Technology, Pasadena
• OSTI ID: 5532666
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 108:8; ISSN JACSA
• Country of Publication: United States
• Language: English

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ADSORPTION
ALDEHYDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY-LOSS SPECTROSCOPY
EXPERIMENTAL DATA
FORMALDEHYDE
HEATING
HYDROGEN
INFORMATION
LIGANDS
LOW TEMPERATURE
MASS SPECTROSCOPY
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION INTERMEDIATES
RUTHENIUM
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS