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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)
KeywordCo Oxidation Prox Ir-fe Catalyst Iridium Microcalorimetry
Source PublicationCATALYSIS TODAY
2008-02-29
DOI10.1016/j.cattod.2007.10.058
Volume131Issue:1-4Pages:457-463
Indexed ByISTP ; SCI
SubtypeArticle
Department15
Funding Project1501
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordCARBON-SUPPORTED CATALYSTS ; FUEL-CELL APPLICATIONS ; H-2-RICH GAS STREAMS ; SELECTIVE OXIDATION ; LOW-TEMPERATURE ; METAL-CATALYSTS ; MONOXIDE ; SURFACE ; H-2 ; FE
AbstractIn 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.
Language英语
URL查看原文
WOS IDWOS:000253382100064
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/100067
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhang T(张涛); Zhang T(张涛)
Affiliation1.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
Recommended Citation
GB/T 7714
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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