Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
DESORPTION AND CATALYTIC PROPERTIES OF PALLADIUM, SUPPORTED ON AL2O3-LA2O3, PREPARED BY THE SOL-GEL METHOD
Autore:
FUENTES S; BOGDANCHIKOVA NE; DIAZ G; PERAAZA M; SANDOVAL GC;
Indirizzi:
UNAM,INST FIS,POB 439036 SAN YSIDRO CA 92143 UNAM,INST FIS SAN YSIDRO CA 92143 CICESE ENSENADA BAJA CALIFORNIA MEXICO UNIV GUADALAJARA GUADALAJARA 44430 JALISCO MEXICO
Titolo Testata:
Catalysis letters
fascicolo: 1, volume: 47, anno: 1997,
pagine: 27 - 34
SICI:
1011-372X(1997)47:1<27:DACPOP>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITRIC-OXIDE; HYDROGEN; ALUMINA; H-2; REDUCTION; CO;
Keywords:
PD/AL2O3-LA2O3 CATALYSTS; NO REDUCTION; HYDROGEN SPILLOVER; SOL-GEL PREPARATION METHOD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
S. Fuentes et al., "DESORPTION AND CATALYTIC PROPERTIES OF PALLADIUM, SUPPORTED ON AL2O3-LA2O3, PREPARED BY THE SOL-GEL METHOD", Catalysis letters, 47(1), 1997, pp. 27-34

Abstract

Desorption and catalytic properties of 0.3 wt% Pd catalysts supportedon alumina-lanthana, prepared by the sol-gel method, were studied. A large excess of consumed hydrogen was observed during TPR experiments on these catalysts due to the partial reduction of lanthana. The enhanced hydrogen adsorption (H/Pd varies from 8 to 15) detected by TPD forthese catalysts is supposed to be a consequence of spillover. Spillover of hydrogen is favored by a high dispersion of palladium on the support surface and the presence of lanthana reduced species. Palladium on alumina-lanthana catalysts show a higher catalytic activity than palladium on alumina catalysts because reduced species of lanthana stabilize palladium particles. Similarity of ammonia selectivity at high temperatures allows one to suggest that reduced lanthana is involved in the reaction on pure alumina-lanthana support and palladium on alumina-lanthana catalysts at these temperatures. A synergetic effect between small palladium particles and reduced species of lanthana is suggestedto be responsible for observed behavior of the lanthana-promoted palladium catalysts.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 04:36:21