Ethylene adsorption and decomposition on Pt(210): Chemistry of. pi. -bound ethylene

Journal Article · Thu Jun 28 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100376a026· OSTI ID:6379162

Backman, A L; Masel, R I ^[1]

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1. Univ. of Illinois, Urbana (USA)

The adsorption and decomposition of ethylene on the Pt(210) crystal surface was examined by using temperature-programmed desorption (TPD) and electron energy loss spectroscopy (EELS). At 100 K, the ethylene adsorbs molecularly on the Pt(210) surfaces to form a type 2 {pi}-bound complex with bonding like that in Zeise's salt. Some of the {pi}-bound ethylene desorbs around 250 K, and some reacts to form ethane (C{sub 2}H{sub 6}) and adsorbed CH{sub 3} groups. However, much of the {pi}-bound ethylene remains on the surface to 300 K. This {pi}-bound ethylene decomposes between 300 and 330 K to form ethan-1-yl-2-ylidyne ({mu}{sub 4}{triple bond}CCH{sub 2}{sup {minus}}) and hydrogen. More {pi}-bound ethylene forms on Pt(210) than on any face of platinum studied previously. Further, {pi}-bound ethylene is stable to higher temperatures than on any other face of platinum studied previously. Thus, we conclude that sites on the Pt(210) surface are especially conductive for the production of {pi}-bound ethylene as expected theoretically.

• OSTI ID: 6379162
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:13; 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
ADSORPTION
ALKENES
CATALYSTS
CHEMICAL REACTIONS
DATA
DATA ANALYSIS
DECOMPOSITION
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PLATINUM
PLATINUM METALS
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS