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题名: CO oxidation at low temperature over Pd supported on CeO2-TiO2 composite oxide
作者: Zhu, Huaqing;  Qin, Zhangfeng;  Shan, Wenjuan;  Shen, Wenjie;  Wang, Jianguo
通讯作者: 王建国
关键词: CO oxidation ;  palladium ;  ceria ;  titania ;  DRIFTS ;  composite oxide ;  CeO2-TiO2
刊名: CATALYSIS TODAY
发表日期: 2007-08-30
DOI: 10.1016/j.cattod.2007.06.012
卷: 126, 期:3-4, 页:382-386
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 2;3
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Low temperature CO oxidation was carried out over CeO2-TiO2 composite oxide and thereon supported Pd catalysts. The effects of Ce/Ti ratio and pre-treatments of calcination and reduction on the catalytic behaviour were investigated. The CO oxidation starts at about 220 degrees C over CeO2-TiO2 and the pre-reduction treatment has little influence on the catalytic activity. Pd supported on CeO2-TiO2 (Pd/CeO2-TiO2) exhibits high activity for CO oxidation and a complete conversion of CO to CO2 can be achieved even at ambient temperature, which suggests a synergistic effect between Pd and CeO2-TiO2. The activity and stability of Pd/CeO2-TiO2 can be further improved by the pre-reduction treatment. Ce/Ti ratio influences the catalytic behaviour significantly; the catalyst Pd/CeO2-TiO2 with a Ce/Ti mole ratio of 0.20 (Pd/Ce20Ti) owns the highest activity and stability, which suggests an optimization of the Pd-Ce-Ti interaction in Pd/Ce20Ti. The calcined Pd/Ce02-CeO2-TiO2 with a Ce/Ti mole ratio higher than 0.10 shows a distorted light-off profile with the temperature, which implies an alternation of the reaction mechanism with increasing temperature. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: OXYGEN STORAGE CAPACITY ;  MIXED OXIDES ;  REDOX BEHAVIOR ;  PD/CEO2-TIO2 CATALYST ;  SOLID-SOLUTIONS ;  H-2 ;  CERIA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000249239200018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98739
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhu, Huaqing,Qin, Zhangfeng,Shan, Wenjuan,et al. CO oxidation at low temperature over Pd supported on CeO2-TiO2 composite oxide[J]. CATALYSIS TODAY,2007,126(3-4):382-386.
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