The interaction of carbon disulfide, CS2, with polycrystalline MgO was investigated by means of infrared and UV-visible spectroscopies and ab initio electronic structure calculations. The aim was to understand the modi cations of the surface properties of MgO microcrystals induced by the substitution of O2- with S2- anions. The interaction of CS2 with MgO shows the formation of thiocarbonates followed by O-S exchange reactions and formation of Mg2+-S2- clusters in a MgO matrix. The O-S exchange reaction involves mainly the low-coordinated O2- anions at the steps and corner sites, and only at high temperature are a small number of O2- anions at the (100) terrace sites involved. The replacement of the O with the S atoms at the low-coordinated sites of the MgO surface transforms the reactive polycrystalline material into a chemically inert system

Scarano, D., Bertarione, S., Zecchina, A., Soave, R., Pacchioni, G. (2002). Adsorption of CS2 on MgO microcrystals: Formation of a S-doped MgO surface. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 4(2), 366-374 [10.1039/B104566K].

Adsorption of CS2 on MgO microcrystals: Formation of a S-doped MgO surface

PACCHIONI, GIANFRANCO
2002

Abstract

The interaction of carbon disulfide, CS2, with polycrystalline MgO was investigated by means of infrared and UV-visible spectroscopies and ab initio electronic structure calculations. The aim was to understand the modi cations of the surface properties of MgO microcrystals induced by the substitution of O2- with S2- anions. The interaction of CS2 with MgO shows the formation of thiocarbonates followed by O-S exchange reactions and formation of Mg2+-S2- clusters in a MgO matrix. The O-S exchange reaction involves mainly the low-coordinated O2- anions at the steps and corner sites, and only at high temperature are a small number of O2- anions at the (100) terrace sites involved. The replacement of the O with the S atoms at the low-coordinated sites of the MgO surface transforms the reactive polycrystalline material into a chemically inert system
Articolo in rivista - Articolo scientifico
chemisorption, oxide surfaces
English
2002
4
2
366
374
none
Scarano, D., Bertarione, S., Zecchina, A., Soave, R., Pacchioni, G. (2002). Adsorption of CS2 on MgO microcrystals: Formation of a S-doped MgO surface. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 4(2), 366-374 [10.1039/B104566K].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/23795
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