Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effect of Ni-aluminate support for enhancing activity of Pd based three-way catalyst
Autore:
Yamamoto, S; Matsushita, K; Hanaki, Y;
Indirizzi:
Nissan Motor Co Ltd, Nissan Res Ctr, Mat Res Lab, Yokosuka, Kanagawa 2378523, Japan Nissan Motor Co Ltd Yokosuka Kanagawa Japan 2378523 nagawa 2378523, Japan
Titolo Testata:
NIPPON KAGAKU KAISHI
fascicolo: 1, , anno: 2001,
pagine: 19 - 25
SICI:
0369-4577(200101):1<19:EONSFE>2.0.ZU;2-9
Fonte:
ISI
Lingua:
JPN
Soggetto:
PALLADIUM CATALYSTS; REDUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Yamamoto, S Nissan Motor Co Ltd, Nissan Res Ctr, Mat Res Lab, 1 Natushima Cho, Yokosuka, Kanagawa 2378523, Japan Nissan Motor Co Ltd 1 Natushima Cho Yokosuka Kanagawa Japan 2378523
Citazione:
S. Yamamoto et al., "Effect of Ni-aluminate support for enhancing activity of Pd based three-way catalyst", NIP KAG KAI, (1), 2001, pp. 19-25

Abstract

Three-way catalystic performances of Pd catalyst supported on Ni-aluminatewas superior than those supported on other supports. Adsorption and reduction properties of Ni-aluminate were investigated. The surface Ni2+ sites inNi-aluminate were shown to act the adsorption sites of NO under both oxidative and reductive conditions. Under reductive conditions, in particular the Ni2+ sites cropped out abundantly resulting in a great increase in the quantity of NO adsorption. Ni-aluminate had higher resistance to the reduction with H-2, allowing to be reduced at 800 degreesC and, after the reduction, Ni-aluminate nearly recovered its previous state through a reverse process of re-oxidation. The reduction with H-2 was enhanced by the presence of supported Pd; Partial reduction occurred at about 400 degreesC, and the reduction peaks on the high temperature region shifted by about 50 degreesC. Asconfirmed from the activity test by using a model gas mixture (C3H6-NO-O-2), the Ni-aluminate supported Pd catalyst was more efficient in light-off activity and NOx conversion activity under both stoichiometric and rich atmosphere than the Pd catalyst supported on gamma -Al2O3. Based on these results, the excellent catalytic activity of the Ni-aluminate supported Pd catalyst is considered to show up through a mechanism in which the Ni-aluminate provides the adsorption sites for NO and transfer the adsorbed NO species to the catalytic reaction sites of Pd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:33:15