The reaction of carbon dioxide with an oxygen precovered Ag(110) surface

Autor:	Ivan Stensgaard, Flemming Besenbacher, E. Lægsgaard
Rok vydání:	1995
Předmět:	Inorganic chemistry Analytical chemistry General Physics and Astronomy chemistry.chemical_element Oxygen Ion law.invention chemistry.chemical_compound Oxygen atom chemistry law Monolayer Carbon dioxide Carbonate Physical and Theoretical Chemistry Scanning tunneling microscope
Zdroj:	Stensgaard, I, Lægsgaard, E & Besenbacher, F 1995, ' The reaction of carbon dioxide with an oxygen precovered Ag(110) surface ', Jour. Chem. Phys, vol. 103, pp. 9825 .
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.469949
Popis:	The reaction of CO2 with an oxygen precovered Ag(110) surface leading to the formation of carbonate has been studied by scanning tunneling microscopy (STM) for different oxygen precoverages. For coverages below 0.5 monolayers (ML), the reaction is initiated preferentially at steps and defects and spreads uniaxially along the [001] directed, added ‐Ag–O‐ rows. For initial oxygen coverages below 0.25 ML, complete transformation to the carbonate structure is observed. For higher initial oxygen coverage, the unreacted rows are compressed to a (2×1) structure. In all cases, the ratio of carbonate ions formed to oxygen atoms consumed from added rows is close to 1:2. The reaction leads to a new reconstruction of the surface in which the carbonate ions are seen to reside preferentially on top of [110] directed triplet structures.
Databáze:	OpenAIRE
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