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Titolo:
INFRARED STUDY OF CROTONALDEHYDE AND CO ADSORPTION ON A PT TIO2 CATALYST/
Autore:
COLOMA F; CORONADO JM; ROCHESTER CH; ANDERSON JA;
Indirizzi:
UNIV DUNDEE,DEPT CHEM DUNDEE DD1 4HN SCOTLAND UNIV DUNDEE,DEPT CHEM DUNDEE DD1 4HN SCOTLAND
Titolo Testata:
Catalysis letters
fascicolo: 3-4, volume: 51, anno: 1998,
pagine: 155 - 162
SICI:
1011-372X(1998)51:3-4<155:ISOCAC>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-SUPPORT INTERACTIONS; ADSORBED CARBON-MONOXIDE; SINGLE-CRYSTALS; SPECTRA; HYDROGENATION; PLATINUM; SURFACES; SELECTIVITY; RUTHENIUM; PT(111);
Keywords:
FTIR; PT/TIO2; CROTONALDEHYDE HYDROGENATION; CO ADSORPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
F. Coloma et al., "INFRARED STUDY OF CROTONALDEHYDE AND CO ADSORPTION ON A PT TIO2 CATALYST/", Catalysis letters, 51(3-4), 1998, pp. 155-162

Abstract

A Pt/TiO2 catalyst has been subjected to reduction in hydrogen at 473, 573 and 773 K and the various degrees of metal-support interaction (SMSI) confirmed by means of CO and H-2 chemisorption, FTIR of CO and the hydrogenation of crotonaldehyde. Coadsorption of CO and crotonaldehyde were performed to identify the preferred adsorption site and mode of adsorption of the unsaturated aldehyde. Results which appear to suggest shifts to lower frequencies of bands due to adsorbed carbonyls are not due to electronic effects induced by coadsorption, but rather indicate displacement of CO from the weaker bonding sites which eliminate dipole coupling effects between different carbonyl clusters, and consequently removes intensity transfer phenomena leading to enhancement in intensity at lower frequencies.

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Documento generato il 04/07/20 alle ore 05:27:03