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题名: Fe-57 Mossbauer Spectroscopy of Ir-Fe Catalysts for Preferential CO Oxidation in H-2
作者: Liu Kuo1, 2;  Zhang Wansheng1;  Wang Junhu1;  Wang Aiqin1;  Huang Yanqiang1;  Jin Changzi1;  Shen Jianyi3;  Zhang Tao1
关键词: carbon monoxide ;  selective oxidation ;  iridium ;  iron ;  quasi Mossbauer spectroscopy ;  microcalorimetry ;  metal-metal interaction
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010-11-01
DOI: 10.1016/S1872-2067(10)60122-2
卷: 31, 期:11, 页:1335-1341
收录类别: SCI
文章类型: Article
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: New insights on the interaction between Ir and Fe oxide are reported. Three Ir-Fe catalysts were prepared by different impregnation sequences of an Al2O3 support. Co-impregnation gave a better catalyst for the preferential CO oxidation in H-2 (PROX) reaction. Microcalorimetry data showed that the adsorption of CO and H-2 were different. Quasi in situ Mossbauer data of the three catalysts after reduction, reoxidation, and PROX reaction showed that a strong interaction between Ir and Fe affected the redox properties of the Ir-Fe catalysts. CO conversion was proportional to the concentration of the Fe2+(a) species, thus, Fe2+(a) was an active site in the PROX reaction. The impregnation sequence influenced the interaction between Ir and Fe and consequently, the amount of the active Fe2+(a) species. A strong Ir-Fe interaction stabilized the active Fe2+ sites for activating O-2.
关键词[WOS]: CARBON-MONOXIDE ;  ROOM-TEMPERATURE ;  HYDROGEN ;  NANOPARTICLES ;  PROMOTION ;  SURFACE ;  GASES ;  PTFE
语种: 英语
WOS记录号: WOS:000287274100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141901
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, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Nanjing Univ, Dept Chem, Nanjing 210093, Jiangsu, Peoples R China

Recommended Citation:
Liu Kuo,Zhang Wansheng,Wang Junhu,et al. Fe-57 Mossbauer Spectroscopy of Ir-Fe Catalysts for Preferential CO Oxidation in H-2[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(11):1335-1341.
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