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Title: Adsorption of ethane, ethene, and ethyne on reconstructed Fe3O4(001)

Abstract

The adsorption of the C2 hydrocarbons including ethane, ethene, and ethyne are studied on magnetite Fe3O4(001) by a combination of molecular beam dosing, temperature programmed desorption, and X-ray photoelectron spectroscopy. The ethane desorption profile has a single temperature invariant peak at 100 K while ethene and ethyne exhibit additional peaks at ~120 K and ~135 K. An inversion analysis is used to extract coverage dependent desorption energies as well as coverage-averaged prefactors for each molecule. Ethene and ethyne exhibit moderate coverage dependent desorption energies decreasing from ~80 to ~30 kJ/mol at saturation while ethane shows a relatively coverage invariant desorption energy ~28 kJ/mol. The desorption energies of the C2 hydrocarbons increase in order of increasing bond order. This is likely due to the enhanced interaction of the ethene and ethyne p system to the coordinatively unsaturated octahedral Fe sites (Feoct) on the ¬oxide surface. The saturation coverages of each C2 hydrocarbon at 82 K were also determined. Furthermore, these match well with the 2-dimensional spacing determined from their liquid densities.

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Institute for Integrated Catalysis
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Institute for Integrated Catalysis; Washington State Univ., Pullman, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1836239
Alternate Identifier(s):
OSTI ID: 1894409
Report Number(s):
PNNL-SA-161889
Journal ID: ISSN 0039-6028
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Surface Science
Additional Journal Information:
Journal Volume: 714; Journal ID: ISSN 0039-6028
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Lee, Christopher J., Sharp, Marcus, Smith, Ronald S., Kay, Bruce D., and Dohnalek, Zdenek. Adsorption of ethane, ethene, and ethyne on reconstructed Fe3O4(001). United States: N. p., 2021. Web. doi:10.1016/j.susc.2021.121932.
Lee, Christopher J., Sharp, Marcus, Smith, Ronald S., Kay, Bruce D., & Dohnalek, Zdenek. Adsorption of ethane, ethene, and ethyne on reconstructed Fe3O4(001). United States. https://doi.org/10.1016/j.susc.2021.121932
Lee, Christopher J., Sharp, Marcus, Smith, Ronald S., Kay, Bruce D., and Dohnalek, Zdenek. Sun . "Adsorption of ethane, ethene, and ethyne on reconstructed Fe3O4(001)". United States. https://doi.org/10.1016/j.susc.2021.121932. https://www.osti.gov/servlets/purl/1836239.
@article{osti_1836239,
title = {Adsorption of ethane, ethene, and ethyne on reconstructed Fe3O4(001)},
author = {Lee, Christopher J. and Sharp, Marcus and Smith, Ronald S. and Kay, Bruce D. and Dohnalek, Zdenek},
abstractNote = {The adsorption of the C2 hydrocarbons including ethane, ethene, and ethyne are studied on magnetite Fe3O4(001) by a combination of molecular beam dosing, temperature programmed desorption, and X-ray photoelectron spectroscopy. The ethane desorption profile has a single temperature invariant peak at 100 K while ethene and ethyne exhibit additional peaks at ~120 K and ~135 K. An inversion analysis is used to extract coverage dependent desorption energies as well as coverage-averaged prefactors for each molecule. Ethene and ethyne exhibit moderate coverage dependent desorption energies decreasing from ~80 to ~30 kJ/mol at saturation while ethane shows a relatively coverage invariant desorption energy ~28 kJ/mol. The desorption energies of the C2 hydrocarbons increase in order of increasing bond order. This is likely due to the enhanced interaction of the ethene and ethyne p system to the coordinatively unsaturated octahedral Fe sites (Feoct) on the ¬oxide surface. The saturation coverages of each C2 hydrocarbon at 82 K were also determined. Furthermore, these match well with the 2-dimensional spacing determined from their liquid densities.},
doi = {10.1016/j.susc.2021.121932},
journal = {Surface Science},
number = ,
volume = 714,
place = {United States},
year = {Sun Aug 29 00:00:00 EDT 2021},
month = {Sun Aug 29 00:00:00 EDT 2021}
}

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