Interaction of Mn with the Ru(001) surface and chemisorption of CO on the Mn/Ru(001) interface

Journal Article · Thu Feb 22 04:00:00 EST 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100367a064· OSTI ID:6664350

Hrbek, J ^[1]

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1. Brookhaven National Lab., Upton, NY (USA)

The interaction of vapor-deposited Mn with the Ru(001) surface and its effect on CO chemisorption were studied under ultrahigh vacuum by Auger electron spectroscopy (AES), thermal desorption spectroscopy (TDS), isotopic exchange, and low-energy electron diffraction (LEED). At room temperature, Mn grows layer by layer. The first three layers are pseudomorphic with respect to the Ru substrate. A complete analysis of Mn thermal desorption data shows that there is a decrease of the heat of adsorption with increasing coverage within the first monolayer (59 to 55 kcal/mol) and zero-order desorption for higher coverages with desorption energy 54 kcal/mol. A new, higher temperature CO desorption state at 650-800 K appears at submonolayer coverages. The C-O bond of CO chemisorbed on Mn/Ru is severely weakened and probably dissociated as evidenced by a high CO desorption temperature and random isotope mixing of coadsorbed isotopes of carbon monoxide.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6664350
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:4; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
BIMETALS
CALCULATION METHODS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MANGANESE
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RUTHENIUM
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS