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Naphthalene Decomposition on Fe(110)─Adsorption, Dehydrogenation, Surface Carbon Formation and the Influence of Coadsorbed Oxygen

Hohmann, Lea ; Dahlmann, Franziska ; Braghin, Giorgio Bruno ; Laviron, Léonie ; Hussein, Layal ; Martinez, Jakob ; Harrer, Anton ; Robertson, Haley ; Guiborat, Jona and Hu, Xiaoming , et al. (2025) In Journal of Physical Chemistry C 129(5). p.2441-2452
Abstract
Tar is an undesirable byproduct of biomass gasification, which can be removed through catalytic reforming to syngas components. Iron is a promising, abundant alternative to highly active but toxic nickel catalysts. The results observed so far in catalytic studies with iron have been mixed. In this paper, the decomposition of naphthalene, a representative model compound of tar, was studied on the catalytic Fe(110) surface using temperature-programmed desorption (TPD), sum frequency generation spectroscopy (SFG), and X-ray photoelectron spectroscopy (XPS). Naphthalene adsorption, dehydrogenation and the formation of surface carbon were investigated, as well as the influence of oxygen. In comparison with previous studies on Ni(111), a similar... (More)
Tar is an undesirable byproduct of biomass gasification, which can be removed through catalytic reforming to syngas components. Iron is a promising, abundant alternative to highly active but toxic nickel catalysts. The results observed so far in catalytic studies with iron have been mixed. In this paper, the decomposition of naphthalene, a representative model compound of tar, was studied on the catalytic Fe(110) surface using temperature-programmed desorption (TPD), sum frequency generation spectroscopy (SFG), and X-ray photoelectron spectroscopy (XPS). Naphthalene adsorption, dehydrogenation and the formation of surface carbon were investigated, as well as the influence of oxygen. In comparison with previous studies on Ni(111), a similar dehydrogenation activity was found for Fe(110) with two main H2 TPD peaks at 450 and 550 K. The reaction of naphthalene on Fe(110) resulted in the predominant formation of carbidic and atomically adsorbed carbon on the surface, which did not dissolve into the bulk even at high temperatures. A moderately carbon-covered surface was shown to still be active toward naphthalene decomposition. Similarly to Ni(111), large amounts of oxygen inhibited the reaction but, at low oxygen doses, very high hydrogen yields were observed, suggesting that Fe(110) could be a valid alternative for tar decomposition. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
129
issue
5
pages
12 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:39936070
ISSN
1932-7447
DOI
10.1021/acs.jpcc.4c06619
language
English
LU publication?
yes
id
6bf12d41-4f39-48ec-9f42-ee003a60fe7d
date added to LUP
2025-01-28 09:15:20
date last changed
2025-04-30 03:00:09
@article{6bf12d41-4f39-48ec-9f42-ee003a60fe7d,
  abstract     = {{Tar is an undesirable byproduct of biomass gasification, which can be removed through catalytic reforming to syngas components. Iron is a promising, abundant alternative to highly active but toxic nickel catalysts. The results observed so far in catalytic studies with iron have been mixed. In this paper, the decomposition of naphthalene, a representative model compound of tar, was studied on the catalytic Fe(110) surface using temperature-programmed desorption (TPD), sum frequency generation spectroscopy (SFG), and X-ray photoelectron spectroscopy (XPS). Naphthalene adsorption, dehydrogenation and the formation of surface carbon were investigated, as well as the influence of oxygen. In comparison with previous studies on Ni(111), a similar dehydrogenation activity was found for Fe(110) with two main H2 TPD peaks at 450 and 550 K. The reaction of naphthalene on Fe(110) resulted in the predominant formation of carbidic and atomically adsorbed carbon on the surface, which did not dissolve into the bulk even at high temperatures. A moderately carbon-covered surface was shown to still be active toward naphthalene decomposition. Similarly to Ni(111), large amounts of oxygen inhibited the reaction but, at low oxygen doses, very high hydrogen yields were observed, suggesting that Fe(110) could be a valid alternative for tar decomposition.}},
  author       = {{Hohmann, Lea and Dahlmann, Franziska and Braghin, Giorgio Bruno and Laviron, Léonie and Hussein, Layal and Martinez, Jakob and Harrer, Anton and Robertson, Haley and Guiborat, Jona and Hu, Xiaoming and Weissenrieder, Jonas and Engvall, Klas and LaRue, Jerry and Hansson, Tony and Göthelid, Mats and Ghassami, Amirreza and Harding, Dan J. and Öström, Henrik}},
  issn         = {{1932-7447}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{5}},
  pages        = {{2441--2452}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry C}},
  title        = {{Naphthalene Decomposition on Fe(110)─Adsorption, Dehydrogenation, Surface Carbon Formation and the Influence of Coadsorbed Oxygen}},
  url          = {{http://dx.doi.org/10.1021/acs.jpcc.4c06619}},
  doi          = {{10.1021/acs.jpcc.4c06619}},
  volume       = {{129}},
  year         = {{2025}},
}