title: On the fraction of CrII sites involved in the C2H4 polymerization on the Cr/SiO2 Phillips catalyst: a quantification by FTIR spectroscopy.
abstract: An estimation of the fraction of Cr(II) sites involved in the C(2)H(4) polymerization on a Cr(II)/SiO(2) Phillips catalyst has been obtained by means of in situ alternated CO adsorption and C(2)H(4) polymerization FTIR experiments: about 28% of the total surface sites react fast with C(2)H(4), while a lower fraction, which depends upon the temperature reaction conditions, is more slowly involved, in agreement with XANES results.
authors.affiliation: Department of Inorganic, Physical and Materials Chemistry, INSTM centro di riferimento and NIS Centre of Excellence, University of Turin, Torino, Italy. elena.groppo@unito.it
authors.forename: E
authors.initials: E
authors.lastname: Groppo
authors.forename: C
authors.initials: C
authors.lastname: Lamberti
authors.forename: F
authors.initials: F
authors.lastname: Cesano
authors.forename: A
authors.initials: A
authors.lastname: Zecchina