Ultraviolet photoemission studies of acetylene and ethylene adsorptions on the Pt(111) surface: Correlations with LEED studies

W. J. Lo; Y. W. Chung; L. L. Kesmodel; P. C. Stair; G. A. Somorjai

doi:10.1016/0038-1098(77)91060-2

Ultraviolet photoemission studies of acetylene and ethylene adsorptions on the Pt(111) surface: Correlations with LEED studies

W. J. Lo^*, Y. W. Chung, L. L. Kesmodel, P. C. Stair, G. A. Somorjai

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The chemisorption of acetylene and ethylene on platinum (111) surfaces for T ≥ 300 K has been studied with ultraviolet photoelectron spectroscopy (UPS) at 21.2 eV. An activated metastable-stable acetylene transition observed recently in low-energy electron diffraction (LEED) intensity-energy profiles has been seen with the UPS spectra. The upperlying electronic levels of the metastable acetylene state are related to a shifted gas-phase acetylene spectrum. The stable acetylene state appears to involve a stronger molecule-surface interaction and probable rehybridization, consistent with the LEED analysis showing the molecule to be situated in a triangular position at covalent Pt-C distances. Ethylene is founf to dehydrogenate at room temperature to the stable acetylene species on Pt(111) surfaces.

Original language	English (US)
Pages (from-to)	335-337
Number of pages	3
Journal	Solid State Communications
Volume	22
Issue number	6
DOIs	https://doi.org/10.1016/0038-1098(77)91060-2
State	Published - May 1977

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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@article{1e01a1aaa9474eb9b45a89f5cba87ce9,

title = "Ultraviolet photoemission studies of acetylene and ethylene adsorptions on the Pt(111) surface: Correlations with LEED studies",

abstract = "The chemisorption of acetylene and ethylene on platinum (111) surfaces for T ≥ 300 K has been studied with ultraviolet photoelectron spectroscopy (UPS) at 21.2 eV. An activated metastable-stable acetylene transition observed recently in low-energy electron diffraction (LEED) intensity-energy profiles has been seen with the UPS spectra. The upperlying electronic levels of the metastable acetylene state are related to a shifted gas-phase acetylene spectrum. The stable acetylene state appears to involve a stronger molecule-surface interaction and probable rehybridization, consistent with the LEED analysis showing the molecule to be situated in a triangular position at covalent Pt-C distances. Ethylene is founf to dehydrogenate at room temperature to the stable acetylene species on Pt(111) surfaces.",

author = "Lo, {W. J.} and Chung, {Y. W.} and Kesmodel, {L. L.} and Stair, {P. C.} and Somorjai, {G. A.}",

year = "1977",

month = may,

doi = "10.1016/0038-1098(77)91060-2",

language = "English (US)",

volume = "22",

pages = "335--337",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd",

number = "6",

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TY - JOUR

T1 - Ultraviolet photoemission studies of acetylene and ethylene adsorptions on the Pt(111) surface

T2 - Correlations with LEED studies

AU - Lo, W. J.

AU - Chung, Y. W.

AU - Kesmodel, L. L.

AU - Stair, P. C.

AU - Somorjai, G. A.

PY - 1977/5

Y1 - 1977/5

N2 - The chemisorption of acetylene and ethylene on platinum (111) surfaces for T ≥ 300 K has been studied with ultraviolet photoelectron spectroscopy (UPS) at 21.2 eV. An activated metastable-stable acetylene transition observed recently in low-energy electron diffraction (LEED) intensity-energy profiles has been seen with the UPS spectra. The upperlying electronic levels of the metastable acetylene state are related to a shifted gas-phase acetylene spectrum. The stable acetylene state appears to involve a stronger molecule-surface interaction and probable rehybridization, consistent with the LEED analysis showing the molecule to be situated in a triangular position at covalent Pt-C distances. Ethylene is founf to dehydrogenate at room temperature to the stable acetylene species on Pt(111) surfaces.

AB - The chemisorption of acetylene and ethylene on platinum (111) surfaces for T ≥ 300 K has been studied with ultraviolet photoelectron spectroscopy (UPS) at 21.2 eV. An activated metastable-stable acetylene transition observed recently in low-energy electron diffraction (LEED) intensity-energy profiles has been seen with the UPS spectra. The upperlying electronic levels of the metastable acetylene state are related to a shifted gas-phase acetylene spectrum. The stable acetylene state appears to involve a stronger molecule-surface interaction and probable rehybridization, consistent with the LEED analysis showing the molecule to be situated in a triangular position at covalent Pt-C distances. Ethylene is founf to dehydrogenate at room temperature to the stable acetylene species on Pt(111) surfaces.

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JO - Solid State Communications

JF - Solid State Communications

IS - 6

ER -

Ultraviolet photoemission studies of acetylene and ethylene adsorptions on the Pt(111) surface: Correlations with LEED studies

Abstract

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