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Titolo:
Interaction between NO and C2H4 on rh-loaded CeOx(111)
Autore:
Mullins, DR; Zhang, K;
Indirizzi:
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab Oak Ridge TN USA 37831 tl Lab, Oak Ridge, TN 37831 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 7, volume: 105, anno: 2001,
pagine: 1374 - 1380
SICI:
1520-6106(20010222)105:7<1374:IBNACO>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
REDUCED CERIA SURFACES; OXIDE THIN-FILMS; NITROGEN-OXIDE; CO; ETHYLENE; RHODIUM(111); DISSOCIATION; PHOTOEMISSION; CHEMISORPTION; SPECTROSCOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Mullins, DR Oak Ridge Natl Lab, POB 2008,MS 6201, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab POB 2008,MS 6201 Oak Ridge TN USA 37831 USA
Citazione:
D.R. Mullins e K. Zhang, "Interaction between NO and C2H4 on rh-loaded CeOx(111)", J PHYS CH B, 105(7), 2001, pp. 1374-1380

Abstract

The interaction between NO and C2H4 was studied on ceria-supported Rh model catalysts (Rh/CeOX)). When the ceria is fully oxidized the primary reaction products observed in TPD are NO, N-2. CO, and H2O. This is similar to what is observed on Rh(lll) except that CO results from the reduction of the CeO2 by the C in the C2H4 On highly reduced ceria the only hydrogen-containing products are H-2 and a small amount of NH3. The O that comes from NO decomposition on Rh migrates to the CeOX before H2O formation occurs. N-2 andCO desorb from Rh/CeOX at a higher temperature than from Rh/CeO2. Soft X-ray photoemission indicates that the NO and C2H4 do not strongly interact toform new intermediates on Rh/CeO2. As the molecules decompose they produceN and C atoms on the surface, which eventually react to form N-2 or CO. The C and N do combine on reduced Rh/CeOX. CN is formed between 400 and 500 K. The CN produces more complex CXNY species at higher temperatures. These complexes decompose near 700 K to produce N-2 and CO. There are no desorption products that contain both C and N.

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Documento generato il 30/05/20 alle ore 17:10:36