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Titolo:
Pt/CeO2 catalysts: correlation between nanostructural properties and catalytic behaviour in selective hydrogenation of crotonaldehyde
Autore:
Abid, M; Ehret, G; Touroude, R;
Indirizzi:
ULP, ECPM, UMR 7515, CNRS,LERCSI, F-67087 Strasbourg, France ULP Strasbourg France F-67087 5, CNRS,LERCSI, F-67087 Strasbourg, France IPCMS GSI, F-67037 Strasbourg, France IPCMS GSI Strasbourg France F-67037 PCMS GSI, F-67037 Strasbourg, France
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 1-2, volume: 217, anno: 2001,
pagine: 219 - 229
SICI:
0926-860X(20010903)217:1-2<219:PCCBNP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PD/CEO2 CATALYSTS; PLATINUM CATALYSTS; RH/CEO2 CATALYSTS; CERIA; CHLORINE; REDUCTION; TRANSIENT; PT/TIO2; TITANIA; RH-CEO2;
Keywords:
crotonaldehyde selective hydrogenation; Pt/CeO2 catalysts; nanostructural properties; HRTEM analyses; metal-support interactions; chlorine content effects;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Touroude, R ULP, ECPM, UMR 7515, CNRS,LERCSI, 25 Rue Becquerel, F-67087 Strasbourg, France ULP 25 Rue Becquerel Strasbourg France F-67087 sbourg, France
Citazione:
M. Abid et al., "Pt/CeO2 catalysts: correlation between nanostructural properties and catalytic behaviour in selective hydrogenation of crotonaldehyde", APP CATAL A, 217(1-2), 2001, pp. 219-229

Abstract

The nanostructural properties of Pt/CeO2 catalysts, already studied for their specific catalytic behaviours in the selective hydrogenation of crotonaldehyde. [Catal. Lett. 69 (2000) 139] have been examined by high resolutiontransmission electronic microscopy (HRTEM). Three different catalysts wereprepared by impregnation of a commercial ceria support (54m(2)/g) with three different precursors, Pt(NH3)(4)(NO3)(2), H2PtCl6 and Pt(NH3)(4)Cl-2, calcined at 673 K and reduced at low and high temperatures (473 and 973 K). The chlorine-free catalyst showed a nanostructural evolution when increasingthe reduction temperature from 473 to 973 K with the formation of epitaxial CePt5 particles on the support. This phenomenon did not occur when chlorine was present in the catalyst, independently of the particle size. The specific catalytic behaviours of these catalysts obtained in the selective hydrogenation of crotonaldehyde. have been related to these observations. It clearly appeared that the presence of chlorine partly preserves the catalytic properties of platinum metal (hydrogenation of C=C bond) while the catalyst made of CePt5 patch units epitaxial on the CeO2 support could provide. more than 80% crotyl alcohol selectivity, stable as a function of the time-on-stream, up to 45% conversion. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 04:13:31