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

J. G. Vitillo;S. Bordiga;A. Zecchina;
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 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
2010
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
Gianolio, D.; Groppo, E.; Vitillo, J. G.; Damin, A.; Bordiga, S.; Zecchina, A.; Lamberti, C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2076397
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