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Titolo:
N2O adsorption and photochemistry on high area TiO2 powder
Autore:
Rusu, CN; Yates, JT;
Indirizzi:
Univ Pittsburgh, Dept Chem, Ctr Surface Sci, Pittsburgh, PA 15260 USA UnivPittsburgh Pittsburgh PA USA 15260 ace Sci, Pittsburgh, PA 15260 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 13, volume: 105, anno: 2001,
pagine: 2596 - 2603
SICI:
1520-6106(20010405)105:13<2596:NAAPOH>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITROUS-OXIDE ADSORPTION; POROUS VYCOR GLASS; THERMAL-DESORPTION; TIO2(110); SURFACES; DECOMPOSITION; SPECTROSCOPY; TEMPERATURE; PHOTODESORPTION; REDUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Yates, JT Univ Pittsburgh, Dept Chem, Ctr Surface Sci, Pittsburgh, PA 15260 USA Univ Pittsburgh Pittsburgh PA USA 15260 ittsburgh, PA 15260 USA
Citazione:
C.N. Rusu e J.T. Yates, "N2O adsorption and photochemistry on high area TiO2 powder", J PHYS CH B, 105(13), 2001, pp. 2596-2603

Abstract

The adsorption and photochemistry of N2O chemisorbed on TiO2 powder has been investigated. At 157 K, nitrous oxide is molecularly adsorbed on the reduced titanium dioxide. Adsorption on the TiO2 surface takes place through both the N and O ends of the nitrous oxide molecule. The photochemistry of the adsorbed N2O molecules was studied at 157 K by use of UV irradiation in the range 2.1-5.0 eV. The photoactivity of the adsorbed molecule is dependent on the N2O coverage. At low coverages, the adsorbed N2O is photodepletedto produce adsorbed nitrogen. Larger coverages of N2O are not photodepleted to N-2 due to the site blocking in the adsorption process. N-bonded species show a higher photoreactivity than the O-bonded species. Photoformation of NO was not observed at any N2O coverage.

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Documento generato il 19/09/20 alle ore 21:56:11