PUMA
Istituto dei materiali per l'elettronica ed il magnetismo     
Savio L., Gerbi A., Vattuone L., Pushpa R., Bonini N., De Gironcoli S., Rocca M. Subsurface Oxygen Stabilization by a Third Species: Carbonates on Ag(210). In: Journal of Physical Chemistry C, vol. 111 (29) pp. 10923 - 10930. American Chemical Society, 2007.
 
 
Abstract
(English)
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.
Abstract
(Italiano)
Vedi abstract in inglese
URL: http://10.1021/jp0714421
DOI: 10.1021/jp0714421
Subject RAY PHOTOELECTRON-SPECTROSCOPY
CO OXIDATION
ETHYLENE EPOXIDATION
ON-SURFACE
SILVER
ADSORPTION
AG(110)
DIFFUSION
AG(001)
METALS


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