Temperature dependent adsorpion of CO on CrII/SiO2 system inducing Cr mobility on the surface

Diego, Gianolio; Elena, Groppo; Vitillo, Jenny G.; Alessandro, Damin; Bordiga, Silvia; Zecchina, Adriano; Carlo, Lamberti

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.

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Titolo:	Temperature dependent adsorpion of CO on CrII/SiO2 system inducing Cr mobility on the surface
Autori:	Diego Gianolio Elena Groppo VITILLO, JENNY GRAZIA Alessandro Damin BORDIGA, SILVIA ZECCHINA, ADRIANO Carlo Lamberti mostra contributor esterni nascondi contributor esterni
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 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.
Handle:	http://hdl.handle.net/11383/2076334
Appare nelle tipologie:	Poster

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