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Design of a novel bifunctional catalyst IrFe/Al2O3 for preferential CO oxidation
Zhang, Wansheng1,2; Wang, Aiqin1; Li, Lin1; Wang, Xiaodong1; Zhang, Tao1; Zhang T(张涛); Zhang T(张涛)
关键词Co Oxidation Prox Ir-fe Catalyst Iridium Microcalorimetry
刊名CATALYSIS TODAY
2008-02-29
DOI10.1016/j.cattod.2007.10.058
131期:1-4页:457-463
收录类别ISTP ; SCI
文章类型Article
部门归属15
项目归属1501
产权排名1;1
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
关键词[WOS]CARBON-SUPPORTED CATALYSTS ; FUEL-CELL APPLICATIONS ; H-2-RICH GAS STREAMS ; SELECTIVE OXIDATION ; LOW-TEMPERATURE ; METAL-CATALYSTS ; MONOXIDE ; SURFACE ; H-2 ; FE
英文摘要In this study, a novel bifunctional catalyst IrFe/Al2O3, which is very active and selective for preferential oxidation of CO under H-2-rich atmosphere, has been developed. When the molar ratio of Fe/Ir was 5/1, the IrFe/Al2O3 catalyst performed best, with CO conversion of 68% and oxygen selectivity towards CO2 formation of 86.8% attained at 100 degrees C. It has also been found that the impregnation sequence of Ir and Fe species on the Al2O3 support had a remarkable effect on the catalytic performance; the activity decreased following the order of IrFe/Al2O3 > co-IrFe/ Al2O3 > Fefr/Al2O3. The three catalysts were characterized by XRD, H-2-TPR, FT-IR and microcalorimetry. The results demonstrated that when Ir was supported on the pre-formed Fe/Al2O3, the resulting structure (IrFe/Al2O3) allowed more metallic Ir sites exposed on the surface and accessible for CO adsorption, while did not interfere with the O-2 activation on the FeOx species. Thus, a bifunctional catalytic mechanism has been proposed where CO adsorbed on Ir sites and O-2 adsorbed on FeOx sites; the reaction may take place at the interface of Ir and FeOx or via a spill-over process. (C) 2007 Elsevier B.V. All rights reserved.
语种英语
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WOS记录号WOS:000253382100064
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/100067
专题中国科学院大连化学物理研究所
通讯作者Zhang T(张涛); Zhang T(张涛)
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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Zhang, Wansheng,Wang, Aiqin,Li, Lin,et al. Design of a novel bifunctional catalyst IrFe/Al2O3 for preferential CO oxidation[J]. CATALYSIS TODAY,2008,131(1-4):457-463.
APA Zhang, Wansheng.,Wang, Aiqin.,Li, Lin.,Wang, Xiaodong.,Zhang, Tao.,...&张涛.(2008).Design of a novel bifunctional catalyst IrFe/Al2O3 for preferential CO oxidation.CATALYSIS TODAY,131(1-4),457-463.
MLA Zhang, Wansheng,et al."Design of a novel bifunctional catalyst IrFe/Al2O3 for preferential CO oxidation".CATALYSIS TODAY 131.1-4(2008):457-463.
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