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

Direct evidence of adsorption induced CrII mobility on the SiO2 surface upon complexation by CO

GIANOLIO, DIEGO;GROPPO, Elena Clara;VITILLO, Jenny Grazia;DAMIN, Alessandro Ali;BORDIGA, Silvia;ZECCHINA, Adriano;LAMBERTI, Carlo
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
46
52
976
978
http://www.rsc.org/Publishing/Journals/CC/article.asp?doi=b920681g
Surface reactivity; Phillips catalyst; in situ XAFS; EXAFS; XANES; classical carbonyls; non-classical carbonyls
D. Gianolio; E. Groppo; J. G. Vitillo; A. Damin; S. Bordiga; A. Zecchina; C. Lamberti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/73004
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