Title:
CATALYST SUPPORT AND CATALYST FOR EXHAUST-GAS PURIFICATION
Document Type and Number:
WIPO Patent Application WO/2007/049778
Kind Code:
A1
Abstract:
A catalyst support which produces the excellent effect of inhibiting noble-metal
catalyst particles from sintering; and a catalyst for exhaust-gas purification.
The catalyst support, which is for noble-metal supporting, comprises a composite
oxide of: an electron-accepting element (La) which has the property of accepting
an electron from a noble metal element (Pt) upon approach of or contact with the
noble metal element and which does not change in valence through oxidation/reduction
reactions; and other element(s) (Si). The exhaust-gas purification catalyst
comprises this catalyst support and noble-metal catalyst particles deposited
thereon.
Inventors:
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
KOYAMA AKIO (JP)
Application Number:
PCT/JP2006/321589
Publication Date:
May 03, 2007
Filing Date:
October 24, 2006
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
International Classes:
B01J23/63; B01D53/86; B01D53/94; B01J23/42; B01J32/00; F01N3/10; F01N3/28
Domestic Patent References:
| WO2005039759A1 | 2005-05-06 | |||
| WO2005014166A1 | 2005-02-17 |
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| JPH09313938A | 1997-12-09 | |||
| JP2002233755A | 2002-08-20 | |||
| JP2002001120A | 2002-01-08 | |||
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Other References:
OGATA A. ET AL.: "Enhancement effect of Mg2+ ion on direct nitric oxide decomposition over supported palladium catalysts", APPLIED CATALYSIS, vol. 65, 1990, pages L11 - L15, XP001246481
LI X. ET AL.: "A new NOx storage-reduction electrochemical catalyst", APPL. CAT. B: ENVIRONMENTAL, vol. 61, 11 July 2005 (2005-07-11), pages 267 - 273, XP005108086
FOTI G. ET AL.: "Electrochemical promotion of Rh catalyst in gas-phase reduction of NO by propylene", JOURNAL OF APPLIED ELECTROCHEMISTRY, vol. 30, 2000, pages 1223 - 1228, XP003012411
CHENG HAO ET AL.: "NOx Storage Performance of Pt/Mg-Al-O Catalyst", CUIHUA XUEBAO (CHINESE JOURNAL OF CATALYSIS), vol. 25, no. 4, 2004, pages 272 - 276, XP003012412
FORNASARI G.: "Role of the Mg/Al atomic radio in hydrotalcite-based catalysts for NOx storage/reduction", APPLIED CLAY SCIENCE, vol. 29, June 2005 (2005-06-01), pages 258 - 266, XP004910244
SILLETTI B.A. ET AL.: "A novel Pd/MgAlOx catalyst for NOx storage-reduction", CATALYSIS TODAY, vol. 114, 30 April 2006 (2006-04-30), pages 64 - 71, XP005367436
See also references of EP 1946836A4
LI X. ET AL.: "A new NOx storage-reduction electrochemical catalyst", APPL. CAT. B: ENVIRONMENTAL, vol. 61, 11 July 2005 (2005-07-11), pages 267 - 273, XP005108086
FOTI G. ET AL.: "Electrochemical promotion of Rh catalyst in gas-phase reduction of NO by propylene", JOURNAL OF APPLIED ELECTROCHEMISTRY, vol. 30, 2000, pages 1223 - 1228, XP003012411
CHENG HAO ET AL.: "NOx Storage Performance of Pt/Mg-Al-O Catalyst", CUIHUA XUEBAO (CHINESE JOURNAL OF CATALYSIS), vol. 25, no. 4, 2004, pages 272 - 276, XP003012412
FORNASARI G.: "Role of the Mg/Al atomic radio in hydrotalcite-based catalysts for NOx storage/reduction", APPLIED CLAY SCIENCE, vol. 29, June 2005 (2005-06-01), pages 258 - 266, XP004910244
SILLETTI B.A. ET AL.: "A novel Pd/MgAlOx catalyst for NOx storage-reduction", CATALYSIS TODAY, vol. 114, 30 April 2006 (2006-04-30), pages 64 - 71, XP005367436
See also references of EP 1946836A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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