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

Journal Article · Wed Apr 16 00:00:00 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), Vol. 108:8
• Country of Publication: United States
• Language: English

Related Subjects

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