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题名: Quasi In Situ Fe-57 Mossbauer Spectroscopic Study: Quantitative Correlation between Fe2+ and H-2 Concentration for PROX over Ir-Fe/SiO2 Catalyst
作者: Liu, Kuo2, 3;  Wang, Aiqin3;  Zhang, Wansheng3;  Wang, Junhu3;  Huang, Yangiang3;  Shen, Jianyi1;  Zhang, Tao3
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2010-05-13
DOI: 10.1021/jp101697e
卷: 114, 期:18, 页:8533-8541
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: In this study, Ir-Fe/SiO2 catalyst was prepared by coimpregnation and investigated for preferential oxidation of CO under the presence of Hi. it was found that the presence of H-2, even in a slight excess, led to a large increase in the reaction rate for CO oxidation over the Ir Fe/SiO2 catalyst, which was quite different from the case of Ir/SiO2. To reveal the promotional role of Fe associated with the presence of H-2, quasi in situ Mossbauer spectroscopy, in combination with in situ DRIFTS and microcalorimetry, was employed. The results showed that the relative amount of Fe2+ increased with increasing H-2 concentration in the reaction stream, well consistent with the trend of reaction rate for CO conversion, strongly suggesting that Fe2+ is the active site for oxygen activation. H-2 promoted CO oxidation mainly via maintaining a substantial amount of Fe existing as Fe2+.
关键词[WOS]: SELECTIVE CO OXIDATION ;  TEMPERATURE-PROGRAMMED REDUCTION ;  WATER-GAS SHIFT ;  PREFERENTIAL OXIDATION ;  CARBON-MONOXIDE ;  PT/ALUMINA CATALYSTS ;  H-2-RICH GAS ;  HYDROGEN ;  SURFACE ;  PROMOTION
语种: 英语
WOS记录号: WOS:000277280800056
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142248
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.Nanjing Univ, Dept Chem, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Kuo,Wang, Aiqin,Zhang, Wansheng,et al. Quasi In Situ Fe-57 Mossbauer Spectroscopic Study: Quantitative Correlation between Fe2+ and H-2 Concentration for PROX over Ir-Fe/SiO2 Catalyst[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(18):8533-8541.
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