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Surface Chemistry of Alanine on Ni{111}

Nicklin, Richard E. J.; Cornish, Alix; Shavorskiy, Andrey; Baldanza, Silvia; Schulte, Karina LU ; Liu, Zhi; Bennett, Roger A. and Held, Georg (2015) In Journal of Physical Chemistry C 119(47). p.26566-26574
Abstract
The adsorption of l-alanine on Ni{111} has been studied as a model of enantioselective heterogeneous catalysts. Synchrotron-based X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to determine the chemical state, bond coordination, and out-of-plane orientation of the molecule on the surface. Alanine adsorbs in anionic and zwitterionic forms between 250 and approximate to 320 K. NEXAFS spectra exhibit a strong angular dependence of the pi* resonance associated with the carboxylate group, which is compatible with two distinct orientations with respect to the surface corresponding to the bidentate and tridentate binding modes. Desorption and decomposition begin together at... (More)
The adsorption of l-alanine on Ni{111} has been studied as a model of enantioselective heterogeneous catalysts. Synchrotron-based X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to determine the chemical state, bond coordination, and out-of-plane orientation of the molecule on the surface. Alanine adsorbs in anionic and zwitterionic forms between 250 and approximate to 320 K. NEXAFS spectra exhibit a strong angular dependence of the pi* resonance associated with the carboxylate group, which is compatible with two distinct orientations with respect to the surface corresponding to the bidentate and tridentate binding modes. Desorption and decomposition begin together at approximate to 300 K, with decomposition occurring in a multistep process up to approximate to 450 K. Comparison with previous studies of amino acid adsorption on metal surfaces shows that this is among the lowest decomposition temperatures found so far and lower than typical temperatures used for hydrogenation reactions where modified Ni catalysts are used. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
119
issue
47
pages
26566 - 26574
publisher
The American Chemical Society
external identifiers
  • wos:000366006400038
  • scopus:84948706546
ISSN
1932-7447
DOI
10.1021/acs.jpcc.5b08814
language
English
LU publication?
yes
id
bb81b24a-c38a-4198-860e-59afc063cfcc (old id 8557040)
date added to LUP
2016-01-26 13:01:30
date last changed
2017-07-30 03:16:11
@article{bb81b24a-c38a-4198-860e-59afc063cfcc,
  abstract     = {The adsorption of l-alanine on Ni{111} has been studied as a model of enantioselective heterogeneous catalysts. Synchrotron-based X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to determine the chemical state, bond coordination, and out-of-plane orientation of the molecule on the surface. Alanine adsorbs in anionic and zwitterionic forms between 250 and approximate to 320 K. NEXAFS spectra exhibit a strong angular dependence of the pi* resonance associated with the carboxylate group, which is compatible with two distinct orientations with respect to the surface corresponding to the bidentate and tridentate binding modes. Desorption and decomposition begin together at approximate to 300 K, with decomposition occurring in a multistep process up to approximate to 450 K. Comparison with previous studies of amino acid adsorption on metal surfaces shows that this is among the lowest decomposition temperatures found so far and lower than typical temperatures used for hydrogenation reactions where modified Ni catalysts are used.},
  author       = {Nicklin, Richard E. J. and Cornish, Alix and Shavorskiy, Andrey and Baldanza, Silvia and Schulte, Karina and Liu, Zhi and Bennett, Roger A. and Held, Georg},
  issn         = {1932-7447},
  language     = {eng},
  number       = {47},
  pages        = {26566--26574},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Surface Chemistry of Alanine on Ni{111}},
  url          = {http://dx.doi.org/10.1021/acs.jpcc.5b08814},
  volume       = {119},
  year         = {2015},
}