In situ, temperature dependent, XAFS proved that CrII grafted on SiO2 is extracted from the surface upon CO adsorption at 100 K: DRCr–O = +0.08 A ˚ . CO adsorption evolves into two coverage dependent steps: (i) displacement of weak siloxane ligands (non-classical carbonyls); (ii) relaxation of RCr–O surface bond, RCr–CO optimization and transformation into classical carbonyls.
Temperature dependent adsorpion of CO on CrII/SiO2 system inducing Cr mobility on the surface
GIANOLIO, DIEGO;GROPPO, Elena Clara;VITILLO, Jenny Grazia;DAMIN, Alessandro Ali;BORDIGA, Silvia;ZECCHINA, Adriano;LAMBERTI, Carlo
2010-01-01
Abstract
In situ, temperature dependent, XAFS proved that CrII grafted on SiO2 is extracted from the surface upon CO adsorption at 100 K: DRCr–O = +0.08 A ˚ . CO adsorption evolves into two coverage dependent steps: (i) displacement of weak siloxane ligands (non-classical carbonyls); (ii) relaxation of RCr–O surface bond, RCr–CO optimization and transformation into classical carbonyls.
File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
Gianolio_poster.pdf
Accesso aperto
Tipo di file:
POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione
1.86 MB
Formato
Adobe PDF
|
1.86 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
