Ideal Pt loading for a Pt/CeO2-based catalyst stabilized by a Pt-O-Ce bond

被引：113

作者：

Hatanaka, Miho ^{[1
]}

Takahashi, Naoki ^{[1
]}

Tanabe, Toshitaka ^{[1
]}

Nagai, Yasutaka ^{[1
]}

Dohmae, Kazuhiko ^{[1
]}

Aoki, Yuki ^{[2
]}

Yoshida, Takeru ^{[2
]}

Shinjoh, Hirofumi ^{[1
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[2] Toyota Motor Co Ltd, Aichi 4718571, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2010年 / 99卷 / 1-2期

关键词：

Platinum; Ceria; Automotive catalyst; Support interaction; Simulation; OXIDATION REDUCTION TREATMENTS; OXYGEN STORAGE; AUTOMOTIVE CATALYSTS; PT/AL2O3; CATALYSTS; EXHAUST CATALYSTS; EMISSIONS CONTROL; 3-WAY CATALYSTS; PLATINUM; CERIA; REDISPERSION;

D O I：

10.1016/j.apcatb.2010.07.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pt-O-Ce bond formation under suitable oxidative conditions on the surface of a catalyst support inhibits Pt particle sintering and promotes the redispersion of agglomerated Pt particles. In the present study the influence of Pt loading on changes in the catalytic activity and Pt particle size was evaluated for aged and regenerated Pt/CeO2-based catalysts. Catalysts with a lower Pt loading exhibited less catalytic deactivation and Pt sintering. There was an ideal Pt loading for which regeneration restored the Pt particle size and the catalytic activity to the same values as for the fresh state. This ideal Pt loading is discussed in terms of Pt anchor sites by considering the structure and composition around Pt on a CeO2-based catalyst. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：336 / 342

页数：7

共 44 条

[1] Regeneration of thermally aged Pt-Rh/CexZr1-xO2-Al2O3 model three-way catalysts by oxychlorination treatments [J].

Anderson, J. A. ;

Daley, R. A. ;

Christou, S. Y. ;

Efstathiou, A. M. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 64 (3-4) :189-200

[2] EFFECTS OF OXIDATION REDUCTION TREATMENTS OF PT/AL2O3 ON CATALYTIC ACTIVITY AND SELECTIVITY FOR HEXANE REFORMING [J].

ANDERSON, JA ;

MORDENTE, MGV ;

ROCHESTER, CH .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1989, 85 :2991-2998

[3] INFRARED STUDY OF THE EFFECTS OF OXIDATION REDUCTION TREATMENTS ON PT DISPERSION IN PT/AL2O3 CATALYSTS [J].

ANDERSON, JA ;

MORDENTE, MGV ;

ROCHESTER, CH .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1989, 85 :2983-2990

[4]

Aoki Y., 2009, 2009011081 SAE

[5]

Brisley RJ, 1995, 950259 SAE

[6]

CHAKRAVE.BK, 1967, J PHYS CHEM SOLIDS, V28, P2401, DOI 10.1016/0022-3697(67)90026-1

[7] Efficient in-situ regeneration method of the catalytic activity of aged TWC [J].

Christou, Stavroula Y. ;

Efstathiou, Angelos M. .

TOPICS IN CATALYSIS, 2007, 42-43 (1-4) :415-419

[8] SINTERING OF PLATINUM ON ALUMINA MODEL CATALYST [J].

CHU, YF ;

RUCKENSTEIN, E .

JOURNAL OF CATALYSIS, 1978, 55 (03) :281-298

[9] Three-way catalyst emissions control technologies for spark-ignition engines - recent trends and future developments [J].

Collins, Neil R. ;

Twigg, Martyn V. .

TOPICS IN CATALYSIS, 2007, 42-43 (1-4) :323-332

[10]

DIWELL AF, 1991, STUD SURF SCI CATAL, V71, P139, DOI 10.1016/S0167-2991(08)62975-4

← 1 2 3 4 5 →