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The effect of CeO2 and BaO on Pd catalysts used for lean-burn natural gas vehicles
Zhang, Xiaoyu1; Long, Enyan1; Li, Yile1; Zhang, Lijuan2; Guo, Jiaxiu3; Gong, Maochu1; Chen, Yaoqiang1
关键词Ceo2 Bao Modified Al2o3 Lean-burn Natural Gas Vehicles (Ngvs) Catalysts Pd-support Interaction
刊名JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2009-08-04
DOI10.1016/j.molcata.2009.03.028
308期:1-2页:73-78
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]SUPPORTED PALLADIUM CATALYSTS ; METHANE EMISSIONS ABATEMENT ; BIOFUEL COMBUSTION SYSTEMS ; LOW-TEMPERATURE ; COMPLETE OXIDATION ; STRUCTURAL-PROPERTIES ; EXHAUST ; HYDROGENATION ; BEHAVIOR ; CERIA
英文摘要Palladium catalysts supported on Al2O3 doped by BaO and/or CeO2 were prepared by impregnation method. Various techniques, including N-2 adsorption (Brunauer-Emmet-Teller method; BET). X-ray diffraction (XRD), CO-chemisorption, H-2-temperature-programmed reduction (H-2-TPR) and X-ray photoelectron spectroscopy (XPS), Were employed to characterize the effect of BaO and/or CeO2 on the physicochemical properties of prepared catalysts. Catalytic activities for methane and CO oxidation were evaluated in a gas mixture Simulated the exhaust from lean-burn natural gas vehicles (NGVs). The BET results showed that the Supports possessed high specific Surface area, suitable pore Volume and pore size distribution. The activity results indicated that the catalyst modified by CeO2 showed the best performance for methane and CO removal, and the one modified by both BaO and CeO2 the worst. CO-chemisorption and H-2-TPR results indicated that the addition of ceria or barium alone Could increase the dispersion of palladium and improve the reducibility of catalysts. The results of XPS showed that BaO increased the electron density around PdO while CeO2 activated the lattice oxygen and increased the content of oxygen species on the Surface of catalysts. When BaO and CeO2 were added Simultaneously, their respective potential effect was restrained by each other resulting in the decrease of catalytic activity. (C) 2009 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000268359900010
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141254
专题中国科学院大连化学物理研究所
作者单位1.Sichuan Univ, Key Lab Green Chem & Technol, Minist Educ, Coll Chem, Chengdu 610064, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Sichuan Univ, Coll Architecture & Environm, Chengdu 610064, Peoples R China
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Zhang, Xiaoyu,Long, Enyan,Li, Yile,et al. The effect of CeO2 and BaO on Pd catalysts used for lean-burn natural gas vehicles[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2009,308(1-2):73-78.
APA Zhang, Xiaoyu.,Long, Enyan.,Li, Yile.,Zhang, Lijuan.,Guo, Jiaxiu.,...&Chen, Yaoqiang.(2009).The effect of CeO2 and BaO on Pd catalysts used for lean-burn natural gas vehicles.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,308(1-2),73-78.
MLA Zhang, Xiaoyu,et al."The effect of CeO2 and BaO on Pd catalysts used for lean-burn natural gas vehicles".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 308.1-2(2009):73-78.
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