Effect of Mn content on physical properties of CeOx-MnOy support and BaO-CeOx-MnOy catalysts for direct NO decomposition

被引：95
作者：
Hong, Won-Jong [1 ]
Iwamoto, Shinji [2 ]
Hosokawa, Saburo [1 ]
Wada, Kenji [1 ]
Kanai, Hiroyoshi [1 ]
Inoue, Masashi [1 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Kyoto 6158510, Japan
[2] Gunma Univ, Grad Sch Engn, Dept Chem & Chem Biol, Kiryu, Gunma 3768515, Japan
来源：
JOURNAL OF CATALYSIS | 2011年 / 277卷 / 02期
关键词：
CeO2; Ce-Mn mixed oxide; Direct NO decomposition; Oxygen vacancy; NITRIC-OXIDE; COMPLETE OXIDATION; REACTION-MECHANISM; MIXED OXIDES; REDUCTION; OXYGEN; MANGANESE; NITROGEN; FORMALDEHYDE; STABILITY;
D O I：
10.1016/j.jcat.2010.11.007
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：
A series of manganese-cerium mixed oxides were prepared by a glycothermal method, and the NO decomposition activities of the Ba-loaded Ce-Mn oxides were examined. Among the catalysts examined, the highest NO conversion was obtained on the BaO/Ce-Mn oxide catalyst with a Mn/(Ce+Mn) ratio of 0.25. The X-ray diffraction and Raman analyses indicated the formation of Ce-Mn oxide solid solutions with a cubic fluorite structure. The electron spin resonance analysis indicated the presence of paramagnetic Mn2+ species in the composite catalysts. Incorporation of Mn2+ in the fluorite structure of CeO2 causes an increase in the concentration of oxygen vacancies, which play an important role in the NO decomposition activity of the catalysts. The catalysts were also characterized by X-ray photoelectron spectroscopy and temperature-programmed reduction techniques. Based on the results obtained, the relationship between the physical properties of the catalysts and their NO decomposition activities was discussed. (C) 2010 Elsevier Inc. All rights reserved.
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页码：208 / 216
页数：9
相关论文
共 60 条
[1]   OXYGEN INHIBITION IN DECOMPOSITION OF NO ON METAL-OXIDES AND PLATINUM [J].
AMIRNAZMI, A ;
BENSON, JE ;
BOUDART, M .
JOURNAL OF CATALYSIS, 1973, 30 (01) :55-65
[2]   Basic evidence of the molecular dispersion of MnCeOx catalysts synthesized via a novel "Redox-Precipitation" route [J].
Arena, Francesco ;
Trunfio, Giuseppe ;
Negro, Jacopo ;
Fazio, Barbara ;
Spadaro, Lorenzo .
CHEMISTRY OF MATERIALS, 2007, 19 (09) :2269-2276
[3]   Hydrogenation of crotonaldehyde on different Au/CeO2 catalysts [J].
Campo, Betiana ;
Petit, Corinne ;
Volpe, Maria A. .
JOURNAL OF CATALYSIS, 2008, 254 (01) :71-78
[4]   The effect of proximity between Pt and BaO on uptake, release, and reduction of NOx on storage catalysts [J].
Cant, Noel W. ;
Liu, Irene O. Y. ;
Patterson, Michael J. .
JOURNAL OF CATALYSIS, 2006, 243 (02) :309-317
[5]   Formation and stability of barium aluminate and cerate in NOx storage-reduction catalysts [J].
Casapu, M ;
Grunwaldt, JD ;
Maciejewski, M ;
Wittrock, M ;
Göbel, U ;
Baiker, A .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 63 (3-4) :232-242
[6]   Composition-activity effects of Mn-Ce-O composites on phenol catalytic wet oxidation [J].
Chen, H ;
Sayari, A ;
Adnot, A ;
Larachi, F .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 32 (03) :195-204
[7]   Characterization of Pd-mordenite Catalysts for NO Decomposition [J].
de Oliveira, Andrea Marins ;
Costilla, Ignacio ;
Gigola, Carlos ;
Baibich, Ione Maluf ;
da Silva, Victor Teixeira ;
Castella Pergher, Sibele B. .
CATALYSIS LETTERS, 2010, 136 (3-4) :185-191
[8]   VOC oxidation over MnOx-CeO2 catalysts prepared by a combustion method [J].
Delimaris, Dimitrios ;
Ioannides, Theophilos .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 84 (1-2) :303-312
[9]   Total oxidation catalysts based on manganese or copper oxides and platinum of palladium I:: Characterisation [J].
Ferrandon, M ;
Carnö, J ;
Järås, S ;
Björnbom, E .
APPLIED CATALYSIS A-GENERAL, 1999, 180 (1-2) :141-151
[10]   Synthesis and Properties of Layered-Structured Mn5O8 Nanorods [J].
Gao, Tao ;
Norby, Poul ;
Krumeich, Frank ;
Okamoto, Hiroshi ;
Nesper, Reinhard ;
Fjellvag, Helmer .
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (02) :922-928
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