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Title: Amount and orientation of {pi}-bonded ethylene formed at 95 K on K/Pt(111) surfaces (and O/Pt(111) surfaces): A TDS, UPS, XPS, and NEXAFS study

Abstract

The variation in amounts of loosely-bonded (usually called {pi}-bonded) and di-{sigma}-bonded ethylene species adsorbed onto Pt(111) at 95 K in the presence of potassium adatoms has been independently followed, using XPS and TDS, as a function of potassium coverage. The obtained results show that, in the neighborhood of potassium atoms, di-{sigma} ethylene formation is inhibited as well as further reactions leading to ethylidyne formation and dehydrogenation. Di-{sigma} bonding is replaced by a weaker bonding and reversible adsorption at about 130 K. The maximum amount of {pi}-bonded ethylene species formed on the Pt(111) surface at 95 K in the presence of potassium or oxygen adatoms has been investigated, using UPS, XPS, and NEXAFS. The interpretation of data has been made using symmetry considerations and selection rules. It indicates that in the presence of oxygen atoms the carbon-carbon double bond plane is parallel to the surface while potassium adatoms induce a strong rotation of this plane along the carbon-carbon axis. 44 refs., 11 figs.

Authors:
; ;  [1]; ;  [2]
  1. CNRS, Nancy (France)
  2. LURE, Orsay (France)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
273611
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry
Additional Journal Information:
Journal Volume: 96; Journal Issue: 14; Other Information: PBD: 9 Jul 1992
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; ETHYLENE; ADSORPTION; POTASSIUM; SORPTIVE PROPERTIES; PLATINUM; OXYGEN; PHOTOELECTRON SPECTROSCOPY; DEHYDROGENATION; X-RAY SPECTROSCOPY; DESORPTION

Citation Formats

Cassuto, A, Mane, M, Jupille, J, Tourillon, G, and Parent, P. Amount and orientation of {pi}-bonded ethylene formed at 95 K on K/Pt(111) surfaces (and O/Pt(111) surfaces): A TDS, UPS, XPS, and NEXAFS study. United States: N. p., 1992. Web. doi:10.1021/j100193a063.
Cassuto, A, Mane, M, Jupille, J, Tourillon, G, & Parent, P. Amount and orientation of {pi}-bonded ethylene formed at 95 K on K/Pt(111) surfaces (and O/Pt(111) surfaces): A TDS, UPS, XPS, and NEXAFS study. United States. doi:10.1021/j100193a063.
Cassuto, A, Mane, M, Jupille, J, Tourillon, G, and Parent, P. Thu . "Amount and orientation of {pi}-bonded ethylene formed at 95 K on K/Pt(111) surfaces (and O/Pt(111) surfaces): A TDS, UPS, XPS, and NEXAFS study". United States. doi:10.1021/j100193a063.
@article{osti_273611,
title = {Amount and orientation of {pi}-bonded ethylene formed at 95 K on K/Pt(111) surfaces (and O/Pt(111) surfaces): A TDS, UPS, XPS, and NEXAFS study},
author = {Cassuto, A and Mane, M and Jupille, J and Tourillon, G and Parent, P},
abstractNote = {The variation in amounts of loosely-bonded (usually called {pi}-bonded) and di-{sigma}-bonded ethylene species adsorbed onto Pt(111) at 95 K in the presence of potassium adatoms has been independently followed, using XPS and TDS, as a function of potassium coverage. The obtained results show that, in the neighborhood of potassium atoms, di-{sigma} ethylene formation is inhibited as well as further reactions leading to ethylidyne formation and dehydrogenation. Di-{sigma} bonding is replaced by a weaker bonding and reversible adsorption at about 130 K. The maximum amount of {pi}-bonded ethylene species formed on the Pt(111) surface at 95 K in the presence of potassium or oxygen adatoms has been investigated, using UPS, XPS, and NEXAFS. The interpretation of data has been made using symmetry considerations and selection rules. It indicates that in the presence of oxygen atoms the carbon-carbon double bond plane is parallel to the surface while potassium adatoms induce a strong rotation of this plane along the carbon-carbon axis. 44 refs., 11 figs.},
doi = {10.1021/j100193a063},
journal = {Journal of Physical Chemistry},
number = 14,
volume = 96,
place = {United States},
year = {1992},
month = {7}
}