Direct evidence of adsorption induced CrII mobility on the SiO2 surface upon complexation by CO
Articolo
Data di Pubblicazione:
2010
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 Angstroms. 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
100 K: DRCr–O = +0.08 Angstroms. 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
Tipologia CRIS:
Articolo su Rivista
Keywords:
Surface reactivity; Phillips catalyst; in situ XAFS; EXAFS; XANES; classical carbonyls; non-classical carbonyls
Elenco autori:
Gianolio, D.; Groppo, E.; Vitillo, J. G.; Damin, A.; Bordiga, S.; Zecchina, A.; Lamberti, C.
Link alla scheda completa:
Pubblicato in: