Vibrational coupling between ethylidyne species on platinum particles

Journal Article · Wed Mar 11 04:00:00 EST 1992 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja00032a004· OSTI ID:232263

Paul, D K; Beebe, Jr, T P; Uram, K J ^[1]

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1. Univ. of Pittsburgh, PA (United States); and others

Vibrational coupling between neighboring ethylidyne species adsorbed on a Pt/Al{sub 2}O{sub 3} catalyst has been detected using an equimolar mixture of {sup 13}CH{sub 3}C(a) and {sup 12}CH{sub 3}C(a). The coupling is detected by means of the development of increased intensity sharing in the symmetric C-H deformation mode for the chemisorbed ethylidyne species as the ethylidyne coverage increases. The results indicate that ethylidyne is produced from ethylene on (111) facets of small Pt particles, rather than on random trimer Pt sites which might also exist on the catalyst. Experiments on highly dispersed Pt catalyst surfaces have failed to detect ethylidyne production. 37 refs., 10 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 232263
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 6 Vol. 114; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
10 SYNTHETIC FUELS
40 CHEMISTRY
CATALYSTS
CHEMISORPTION
HYDROCARBONS
PARTICLES
PLATINUM COMPOUNDS
SORPTIVE PROPERTIES
VIBRATIONAL STATES