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题名: CeO2-supported Au-38(SR)(24) nanocluster catalysts for CO oxidation: a comparison of ligand-on and -off catalysts
作者: Nie, Xiaotao1, 3;  Zeng, Chenjie2;  Ma, Xiangang1;  Qian, Huifeng2;  Ge, Qingjie1;  Xu, Hengyong1;  Jin, Rongchao2
刊名: NANOSCALE
发表日期: 2013
DOI: 10.1039/c3nr00970j
卷: 5, 期:13, 页:5912-5918
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: The catalytic properties of atomically precise, thiolate-protected Au-38(SR)(24) (R = CH2CH2Ph) nanoclusters supported on CeO2 were investigated for CO oxidation in a fixed bed quartz reactor. Oxygen (O-2) thermal pretreatment of Au-38(SR)(24)/CeO2 at a temperature between 100 and 175 degrees C largely enhanced the catalytic activity, while pretreatment at higher temperatures (>200 degrees C) for removing thiolate instead gave rise to a somewhat lower activity than that for 175 degrees C pretreatment, and the ligand-off clusters were also found to be less stable. The CO conversion in the case of wet feed-gas (i.e. the presence of H2O vapor) was appreciably higher than the case of dry feed-gas when the reaction temperature was kept relatively low (between 60 and 80 degrees C), and interestingly the ligand-on and ligand-off catalysts exhibited opposite response to water vapor. Finally, we discussed some insights into the catalytic reaction involving the well-defined gold nanocluster catalyst.
关键词[WOS]: SUPPORTED AU CATALYSTS ;  PRECISE GOLD NANOCLUSTERS ;  STABILIZED AU-38 CLUSTERS ;  CARBON-MONOXIDE ;  AU-25 CLUSTERS ;  TEMPERATURE ;  NANOPARTICLES ;  SIZE
语种: 英语
WOS记录号: WOS:000320398300032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137904
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, Dalian Natl Lab Clean Energy DNL, Dalian 116023, Peoples R China
2.Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Nie, Xiaotao,Zeng, Chenjie,Ma, Xiangang,et al. CeO2-supported Au-38(SR)(24) nanocluster catalysts for CO oxidation: a comparison of ligand-on and -off catalysts[J]. NANOSCALE,2013,5(13):5912-5918.
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