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Co3O4(100) films grown on Ag(100): Structure and chemical properties

Arman, Alif LU ; Merte, Lindsay LU ; Lundgren, Edvin LU and Knudsen, Jan LU (2017) In Surface Science 657. p.90-95
Abstract
Spinel type Co3O4(100) is successfully grown on Ag(100) at ultrahigh vacuum conditions and its structure, electronic and chemical properties are compared with those of Co3O4(111) grown on Ir(100). We find that the Co3O4(100) is unreconstructed. In contrast to the defect free Co3O4(111) surface the Co3O4(100) surface contains a high concentration of defects that we assign to subsurface cation vacancies analogous to those observed for Fe3O4(100). Our photoemission and absorption spectroscopy experiments reveal a very similar electronic structure of the Co3O4(111) and Co3O4(100) surfaces. The similar electronic structure of the two surfaces is reflected in the CO adsorption properties at low temperatures, as we observe adsorption of molecular... (More)
Spinel type Co3O4(100) is successfully grown on Ag(100) at ultrahigh vacuum conditions and its structure, electronic and chemical properties are compared with those of Co3O4(111) grown on Ir(100). We find that the Co3O4(100) is unreconstructed. In contrast to the defect free Co3O4(111) surface the Co3O4(100) surface contains a high concentration of defects that we assign to subsurface cation vacancies analogous to those observed for Fe3O4(100). Our photoemission and absorption spectroscopy experiments reveal a very similar electronic structure of the Co3O4(111) and Co3O4(100) surfaces. The similar electronic structure of the two surfaces is reflected in the CO adsorption properties at low temperatures, as we observe adsorption of molecular CO as well as the formation of carbonate (CO3) species on both surfaces upon CO exposure at 85 K. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Surface Science
volume
657
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:85006118721
  • wos:000392777800013
ISSN
0039-6028
DOI
10.1016/j.susc.2016.11.011
language
English
LU publication?
yes
id
ee7bf56c-89a9-4f9a-ac46-f90c91efb241
date added to LUP
2017-01-12 22:03:16
date last changed
2018-02-04 04:25:34
@article{ee7bf56c-89a9-4f9a-ac46-f90c91efb241,
  abstract     = {Spinel type Co3O4(100) is successfully grown on Ag(100) at ultrahigh vacuum conditions and its structure, electronic and chemical properties are compared with those of Co3O4(111) grown on Ir(100). We find that the Co3O4(100) is unreconstructed. In contrast to the defect free Co3O4(111) surface the Co3O4(100) surface contains a high concentration of defects that we assign to subsurface cation vacancies analogous to those observed for Fe3O4(100). Our photoemission and absorption spectroscopy experiments reveal a very similar electronic structure of the Co3O4(111) and Co3O4(100) surfaces. The similar electronic structure of the two surfaces is reflected in the CO adsorption properties at low temperatures, as we observe adsorption of molecular CO as well as the formation of carbonate (CO3) species on both surfaces upon CO exposure at 85 K.},
  author       = {Arman, Alif and Merte, Lindsay and Lundgren, Edvin and Knudsen, Jan},
  issn         = {0039-6028},
  language     = {eng},
  pages        = {90--95},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Co3O4(100) films grown on Ag(100): Structure and chemical properties},
  url          = {http://dx.doi.org/10.1016/j.susc.2016.11.011},
  volume       = {657},
  year         = {2017},
}