A mixed Cu-Ni bridge site for CO adsorption

Eric Garfunkel, Mingren Yu, Shu Yang, Xinghong Feng

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

High-resolution electron energy-loss spectroscopy (HREELS) has been used to study carbon monoxide adsorption on mixed overlayers of Cu on Ni(111) and Ni on Cu(111). The mixed CuNi layers are formed by controlling deposition and annealing temperatures, and metal overlayer coverage. HREELS shows top and bridge CO adsorption on sites which resemble CO on pure Cu and Ni (111) surfaces. We also observe a new mixed bridging site species in which CO is bridge bonded between Cu and Ni atoms. The mixed bridging species is only observed at high CO coverages and low temperatures (<130 K), and appears coincident with a decrease in Ni-CO top site occupancy. A thermodynamic model is proposed to explain the CO transfer from the Ni top to the mixed NiCu bridge sites.

Original languageEnglish
Pages (from-to)1579-1584
Number of pages6
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume7
Issue number3
DOIs
Publication statusPublished - 1989

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Carbon Monoxide
Electron energy loss spectroscopy
Adsorption
adsorption
energy dissipation
electron energy
high resolution
Carbon monoxide
carbon monoxide
spectroscopy
Thermodynamics
Annealing
Atoms
Temperature
thermodynamics
annealing
temperature
Metals
metals
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

A mixed Cu-Ni bridge site for CO adsorption. / Garfunkel, Eric; Yu, Mingren; Yang, Shu; Feng, Xinghong.

In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, Vol. 7, No. 3, 1989, p. 1579-1584.

Research output: Contribution to journalArticle

Garfunkel, Eric ; Yu, Mingren ; Yang, Shu ; Feng, Xinghong. / A mixed Cu-Ni bridge site for CO adsorption. In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 1989 ; Vol. 7, No. 3. pp. 1579-1584.
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