Influence of the Defect Concentration of Ceria on the Pt Dispersion and the CO Oxidation Activity of Pt/CeO2

被引：67
作者：
Lee, Jaeha [1 ]
Ryou, YoungSeok [1 ]
Kim, Jonghyun [1 ]
Chan, Xiaojun [2 ]
Kim, Tae Jin [2 ]
Kim, Do Heui [1 ]
机构：
[1] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, Seoul 151744, South Korea
[2] SUNY Stony Brook, Dept Mat Sci & Chem Engn, Stony Brook, NY 11794 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
METAL-SUPPORT INTERACTIONS; WATER-GAS SHIFT; IN-SITU RAMAN; PROPANE DEHYDROGENATION; STRUCTURE SENSITIVITY; PALLADIUM CATALYSTS; PT/AL2O3; CATALYSTS; HYDROGEN PROX; O-CE; PLATINUM;
D O I：
10.1021/acs.jpcc.8b00254
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：
The CO oxidation ability can be modulated by controlling the metal-support interaction of Pt/CeO2 catalysts. The Pt/(800C)CeO2 sample prepared by the thermal treatment of ceria at 800 degrees C before loading Pt maintained the much higher Pt dispersion than Pt/gamma-A(l)2O(3) after the thermal aging at 800 degrees C, indicating its excellent thermal resistance against Pt sintering. In addition, the CO oxidation rate of the Pt/(800C)CeO2 catalyst was order of magnitude higher than that of the Pt/CeO2 catalyst. Such enhanced activity is explained by the weakened Ptceria interaction in Pt/(800C)CeO2, which is evidenced by the formation of PtO2 species that interact weakly with ceria rather than that of Pt-O-Ce species interacting strongly with ceria. The presence of PtO2 species appears to be essential for the high CO oxidation ability.
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收藏
页码：4972 / 4983
页数：12
相关论文
共 60 条
[1]   Rationalization of Interactions in Precious Metal/Ceria Catalysts Using the d-Band Center Model [J].
Acerbi, N. ;
Tsang, S. C. Edman ;
Jones, G. ;
Golunski, S. ;
Collier, P. .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2013, 52 (30) :7737-7741
[2]   A practical demonstration of electronic promotion in the reduction of ceria coated PGM catalysts [J].
Acerbi, Nadia ;
Tsang, Shik Chi ;
Golunski, Stan ;
Collier, Paul .
CHEMICAL COMMUNICATIONS, 2008, (13) :1578-1580
[3]   Effects of reduction temperature and metal-support interactions on the catalytic activity Pt/γ-Al2O3 and Pt/TiO2 for the oxidation of CO in the presence and absence of H2 [J].
Alexeev, OS ;
Chin, SY ;
Engelhard, MH ;
Ortiz-Soto, L ;
Amiridis, MD .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (49) :23430-23443
[4]  
[Anonymous], 1995, HDB XRAY PHOTOELECTR
[5]   Structure sensitivity of selective CO oxidation over Pt/γ-Al2O3 [J].
Atalik, B. ;
Uner, D. .
JOURNAL OF CATALYSIS, 2006, 241 (02) :268-275
[6]   Evolution of the Atomic Structure of Ceria-Supported Platinum Nanocatalysts: Formation of Single Layer Platinum Oxide and Pt-O-Ce and Pt-Ce Linkages [J].
Avakyan, Leon A. ;
Kolpacheva, Natalia A. ;
Paramonova, Ekaterina V. ;
Singh, Jagdeep ;
Hartfelder, Urs ;
van Bokhoven, Jeroen A. ;
Bugaev, Lusegen A. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (49) :28057-28066
[7]   Pretreatment Effect on Pt/CeO2 Catalyst in the Selective Hydrodechlorination of Trichloroethylene [J].
Barrabes, Noelia ;
Foettinger, Karin ;
Llorca, Jordi ;
Dalinov, Anton ;
Medina, Francesc ;
Sa, Jacinto ;
Hardacre, Christopher ;
Rupprechter, Guenther .
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (41) :17675-17682
[8]   KINETICS OF CO OXIDATION ON SINGLE-CRYSTAL PD, PT, AND IR [J].
BERLOWITZ, PJ ;
PEDEN, CHF ;
GOODMAN, DW .
JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (18) :5213-5221
[9]   Investigation of palladium interaction with cerium oxide and its state in catalysts for low-temperature CO oxidation [J].
Boronin, A. I. ;
Slavinskaya, E. M. ;
Danilova, I. G. ;
Gulyaev, R. V. ;
Amosov, Yu. I. ;
Kumetsov, P. A. ;
Polukhina, I. A. ;
Koscheev, S. V. ;
Zaikovskii, V. I. ;
Noskov, A. S. .
CATALYSIS TODAY, 2009, 144 (3-4) :201-211
[10]   Structure-activity relationships of Pt/Al2O3 catalysts for CO and NO oxidation at diesel exhaust conditions [J].
Boubnov, Alexey ;
Dahl, Soren ;
Johnson, Erik ;
Molina, Anna Puig ;
Simonsen, Soren Bredmose ;
Cano, Fernando Morales ;
Helveg, Stig ;
Lemus-Yegres, Lived J. ;
Grunwaldt, Jan-Dierk .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2012, 126 :315-325
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