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Titolo:
Effect of basic metal additives on NOx reduction property of Pd-based three-way catalyst
Autore:
Kobayashi, T; Yamada, T; Kayano, K;
Indirizzi:
NE ChemCat Corp, Shizuoka 4100314, Japan NE ChemCat Corp Shizuoka Japan 4100314 Cat Corp, Shizuoka 4100314, Japan
Titolo Testata:
APPLIED CATALYSIS B-ENVIRONMENTAL
fascicolo: 3-4, volume: 30, anno: 2001,
pagine: 287 - 292
SICI:
0926-3373(20010312)30:3-4<287:EOBMAO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLATINUM; OXIDATION;
Keywords:
Pd-based three-way catalyst; basic metal additive; thermal stability; electron donation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Kobayashi, T NE ChemCat Corp, 678 Ippon Matsu, Shizuoka 4100314, Japan NE ChemCat Corp 678 Ippon Matsu Shizuoka Japan 4100314 Japan
Citazione:
T. Kobayashi et al., "Effect of basic metal additives on NOx reduction property of Pd-based three-way catalyst", APP CATAL B, 30(3-4), 2001, pp. 287-292

Abstract

The three-way catalytic (TWC) performance, especially CO and NO, conversion, of a Pd-only catalyst was improved by the addition of basic elements, and the activity increased as the electronegativity of the additive cations decreased (Ba > Sr > La), indicating that the basicity or electron-donating ability of the additives played a significant role in the improvement of the TWC performance. Thermal decomposition temperature of PdO in promoted catalysts became higher with decreasing the ionic electronegativity of the promoters. XPS analysis proved that the electron density around Pd-(II) in theBa-promoted catalyst was higher than that of Pd-only catalyst. The improvement of the: TWC performance by the addition of basic promoters is discussed in terms of the stabilization of PdO, which may suppress the sintering, as well as of electron enrichment, which endows palladium with the Rh-like catalytic behavior. (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 03/04/20 alle ore 10:51:20