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

Jenny G. Vitillo;Silvia Bordiga;Adriano Zecchina;
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.
HERCULES XX Symposium
Grenoble, France
25-26 Marzo 2010
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2076334
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