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Titolo:
Simultaneous determination of structural and kinetic parameters characterizing the interconversion of highly dispersed species: The interaction of NOwith Rh-I(CO)(2)/gamma-Al2O3
Autore:
Newton, MA; Burnaby, DG; Dent, AJ; Diaz-Moreno, S; Evans, J; Fiddy, SG; Neisius, T; Pascarelli, S; Turin, S;
Indirizzi:
Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England Univ Southampton Southampton Hants England SO17 1BJ 7 1BJ, Hants, England European Synchrotron Radiat Facil, F-38043 Grenoble, France European Synchrotron Radiat Facil Grenoble France F-38043 enoble, France CLR Daresbury, Warrington WA4 4AD, Cheshire, England CLR Daresbury Warrington Cheshire England WA4 4AD 4AD, Cheshire, England
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY A
fascicolo: 25, volume: 105, anno: 2001,
pagine: 5965 - 5970
SICI:
1089-5639(20010628)105:25<5965:SDOSAK>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-ABSORPTION; IN-SITU; SPECTROSCOPY; CATALYSTS; CO; ADSORPTION; CHEMISTRY; CRYSTAL; OXIDE;
Tipo documento:
Letter
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Newton, MA Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England Univ Southampton Southampton Hants England SO17 1BJ s, England
Citazione:
M.A. Newton et al., "Simultaneous determination of structural and kinetic parameters characterizing the interconversion of highly dispersed species: The interaction of NOwith Rh-I(CO)(2)/gamma-Al2O3", J PHYS CH A, 105(25), 2001, pp. 5965-5970

Abstract

Energy-dispersive EXAFS (EDE), combined with mass spectrometry and a flow microreactor system, has been used to investigate the reaction of an Al2O3-supported Rh-I(CO)(2) species with NO. This combined in situ approach uniquely permits a priori analysis of the structures of the species involved (ona time scale of ca. 2 s) and simultaneous determination of reaction mechanism and kinetic parameters. In the current case, it is found that the Al(O)Rh-I(CO)(2)Cl species reacts to form an intermediate Al(O)Rh(NO)(2)Cl Cl species (v approximate to 0.357 +/- 0.125 s(-1), E-act approximate to 11 +/- 1.25 kJ mol(-1)), which subsequently forms an (AlO)(2)Rh(NO)Cl- species andN2O(g) (v approximate to 2 +/- 0.5 x 10(4) s(-1), E-act approximate to 40 /- 3.5 kJ mol(-1)) showing a bent (134 degrees) RhNO bond. This combination of rapid and complementary techniques should be applicable to a wide range of disciplines where quantitative structural and kinetic determinations are of importance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 01:56:20