Adsorption and reaction of methanethiol on W(001)

Journal Article · Thu Sep 09 04:00:00 EDT 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100138a026· OSTI ID:5525775

Mullins, D R; Lyman, P F ^[1]

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1. Oak Ridge National Lab., TN (United States)

Methanethiol (CH[sub 3]SH) adsorbs dissociatively on W(001) at 100 K, forming two distinct intermediates. These species have been identified by S 2p soft X-ray photoelectron spectroscopy (SXPS) as methyl thiolate moieties adsorbed in different bonding sites. Both species are stable at all coverages up to 150 K. At low coverages the thiolates totally decompose upon heating into atomic C and S and gaseous H[sub 2]. At high coverages a competing pathway produces atomic S and gaseous CH[sub 4]. The thiolate adsorbed in a fourfold hollow site undergoes C-S bond scission at a lower temperature than the species in a lower coordination site. At high coverage the fourfold bonded intermediate preferentially leads to total decomposition whereas the other species favors methane formation. 41 refs., 9 figs., 1 tab.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5525775
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:36; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
ALKANES
CATALYSTS
CHEMICAL REACTIONS
DESULFURIZATION
DISSOCIATION
ELEMENTS
HYDROCARBONS
METALS
METHANE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN