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题名: Synthesis and characterization of Ag-hollandite nanofibers and its catalytic application in ethanol oxidation
作者: Chen, Junli;  Tang, Xingfu;  Liu, Junlong;  Zhan, Ensheng;  Li, Juan;  Huang, Xiumin;  Shen, Wenjie
通讯作者: 黄秀敏
刊名: CHEMISTRY OF MATERIALS
发表日期: 2007-08-21
DOI: 10.1021/cm070904k
卷: 19, 期:17, 页:4292-4299
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Ag-hollandite nanofibers were synthesized through a simple hydrothermal process by oxidizing Mn(NO3)(2) with AgMnO4 in aqueous solution. The temperature was found to play an essential role in determining both the crystalline structure and the morphology of the Ag-hollandite materials, whereas the AgMnO4/Mn(NO3)(2) molar ratio affected only the morphology of the product. Ag-hollandite nanofibers with diameters of 20-40 nm and lengths of 0.5-4 mu m were prepared at 160 degrees C and a 2/3 AgMnO4/Mn(NO3)(2) molar ratio. X-ray photoelectron spectroscopy surface analysis revealed that the silver species presented as Ag+ and the average oxidation state of manganese was 3.9. More promisingly, the Ag-hollandite nanofibers showed quite high catalytic performance for ethanol oxidation, with ethanol conversion of 75% and acetaldehyde selectivity of 95% at 230 degrees C for 200 h time-on-stream. The high activity, selectivity, and stability were attributed to the stable presence of Ag+ species and the unique morphology of the Ag-hollandite nanofibers.
关键词[WOS]: OCTAHEDRAL MOLECULAR-SIEVES ;  MANGANESE OXIDE ;  ALKALI-METAL ;  SILVER HOLLANDITE ;  TUNNEL STRUCTURE ;  ION-EXCHANGE ;  PHASE ;  CRYPTOMELANE ;  PERFORMANCE ;  EPOXIDATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000248692500029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98737
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, Peoples R China

Recommended Citation:
Chen, Junli,Tang, Xingfu,Liu, Junlong,et al. Synthesis and characterization of Ag-hollandite nanofibers and its catalytic application in ethanol oxidation[J]. CHEMISTRY OF MATERIALS,2007,19(17):4292-4299.
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