Adsorption and reactions of benzenethiol on the Ni(111) surface

Journal Article · Thu Dec 08 04:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100100a034· OSTI ID:6879029

Rufael, T S; Gland, J L ^[1]; Huntley, D R; Mullins, D R ^[2]

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1. Univ. of Michigan, Ann Arbor, MI (United States)
2. Oak Ridge National Lab., TN (United States)

The adsorption and reactions of benzenethiol have been analyzed on the Ni(111) surface using TPD, XPS, LEED and HREELS. At 110 K, benzenethiol absorbs on the surface through the surface atom. The vibrational data indicate that the S-H bond in benzenethiol breaks upon adsorption at 110 K for all exposures. The primary surface intermediate observed for high coverages of benzenethiol at 190 K is phenyl thiolate. HREELS results indicate that the aromatic ring in phenyl thiolate is neither parallel nor perpendicular to the surface, but tilted. For low coverages of benzenethiol, decomposition of the molecule to gaseous hydrogen, atomic sulfur, and carbon is the favored reaction pathway, while benzene formation is the dominant reaction for higher coverages. Two pathways are observed for the desorption of the benzene product. At intermediate coverages a desorption-limited process occurs near 400 K, while at high coverages benzene desorption is limited by hydrogenolysis of phenyl thiolate at 263 K. Above 300 K, a stable aromatic hydrocarbon intermediate, most likely a phenyl fragment, is observed on the sulfur-covered Ni(111) surface. 32 refs., 6 figs., 1 tab.

• OSTI ID: 6879029
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:49; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ANNEALING
AROMATICS
AUGER ELECTRON SPECTROSCOPY
BENZENE
CATALYSIS
CHEMICAL BONDS
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
HEAT TREATMENTS
HYDROCARBONS
MASS SPECTROSCOPY
METALS
NICKEL
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
REACTION INTERMEDIATES
SCATTERING
SORPTION
SPECTROSCOPY
SURFACE PROPERTIES
THIOLS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY