Chemisorption of CO, H sub 2 , and O sub 2 on ordered Sn/Pt(111) surface alloys

Journal Article · Thu Aug 23 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100380a053· OSTI ID:6439225

Paffett, M T ^[1]; Gebhard, S C; Windham, R G; Koel, B E ^[2]

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1. Los Alamos National Laboratory, NM (USA)
2. Univ. of Colorado, Boulder (USA)

The chemisorption of CO, H{sub 2}, and O{sub 2} on ordered Pt-Sn surface alloys has been investigated by using thermal desorption mass spectroscopy (TDMS), high-resolution electron energy loss spectroscopy (HREELS), low-energy electron diffraction (LEED), Auger electron (AES), X-ray photoelectron (XPS) and ultraviolet photoelectron spectroscopy (UPS), and low-energy ion scattering spectroscopy (LEISS). Alloying with Sn causes only slight decreases in the CO desorption peak temperature compared to Pt(111). A (2{radical}3{times}2{radical}3)R30{degree} LEED pattern is observed for the saturation CO coverage on the p(2{times}2) ordered alloy surface. No ordered CO overlays were observed by LEED from the ({radical}3{times}{radical}3)R30{degree} alloy surface. HREELS indicates the atop-bonded CO is the most strongly adsorbed species on both ordered alloy surfaces, as on Pt(111), and that both atop and bridge sites are populated for saturation CO coverage on both ordered alloy surfaces.

• OSTI ID: 6439225
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:17; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOYS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISORPTION
COHERENT SCATTERING
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
HYDROGEN
ION SCATTERING ANALYSIS
MASS SPECTROSCOPY
METALS
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM
PLATINUM METALS
SCATTERING
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
TIN
TRANSITION ELEMENTS