Subsurface species have often been invoked to explain the activation of catalytic surfaces for specific reactions. In particular, subsurface oxygen is thought to be important for the chemistry of Ag catalysts. Here we show by experimental and theoretical methods that on Ag(210) subsurface oxygen is stabilized by carbonates more efficiently than by O adatoms, thus leading to a concentration up to 4 times larger in the presence of the former adsorbate. Experimentally, a maximum of six subsurface O atoms are found to be stabilized by each carbonate. These results might be relevant for the current efforts to bridge the structure and pressure gaps between surface science and industrial conditions, for which non-negligible amounts of carbonates are surely present.

Subsurface oxygen stabilization by a third species: carbonates on Ag(210) / Savio, L.; Gerbi, A.; Vattuone, L.; Pushpa, R.; Bonini, N.; de Gironcoli, Stefano Maria; Rocca, M.. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 111:29(2007), pp. 10923-10930. [10.1021/jp0714421]

Subsurface oxygen stabilization by a third species: carbonates on Ag(210)

de Gironcoli, Stefano Maria;
2007-01-01

Abstract

Subsurface species have often been invoked to explain the activation of catalytic surfaces for specific reactions. In particular, subsurface oxygen is thought to be important for the chemistry of Ag catalysts. Here we show by experimental and theoretical methods that on Ag(210) subsurface oxygen is stabilized by carbonates more efficiently than by O adatoms, thus leading to a concentration up to 4 times larger in the presence of the former adsorbate. Experimentally, a maximum of six subsurface O atoms are found to be stabilized by each carbonate. These results might be relevant for the current efforts to bridge the structure and pressure gaps between surface science and industrial conditions, for which non-negligible amounts of carbonates are surely present.
2007
111
29
10923
10930
https://pubs.acs.org/doi/10.1021/jp0714421
Savio, L.; Gerbi, A.; Vattuone, L.; Pushpa, R.; Bonini, N.; de Gironcoli, Stefano Maria; Rocca, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16787
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