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学科主题: 物理化学
题名: Synthesis of Au-Ag alloy nanoparticles supported on silica gel via galvanic replacement reaction
作者: Liu, Xiaoyan1, 2;  Wang, Aiqin1;  Li, Lin1;  Zhang, Tao1;  Mou, Chung-Yuan2;  Lee, Jyh-Fu3
通讯作者: 张涛 ;  Chung-Yuan Mou
关键词: Gold ;  Silver ;  Alloy ;  XAS ;  Galvanic replacement ;  reaction
刊名: PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
发表日期: 2013-06-01
DOI: 10.1016/j.pnsc.2013.04.008
卷: 23, 期:3, 页:317-325
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 待补充
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary ;  Multidisciplinary Sciences
资助者: 1,1
研究领域[WOS]: Materials Science ;  Science & Technology - Other Topics
英文摘要: Synthesis of supported Au-Ag bimetallic has attracted much attention since we found for the first time that Au and Ag had synergistic effect on CO oxidation and preferential CO oxidation in rich hydrogen. In this work, the formation of Au-Ag alloy nanoparticles supported on silica gel by galvanic replacement reaction has been investigated. We applied various characterizations including X-ray diffraction (XRD), transmission electronic microscopy (TEM), ultraviolet visible spectroscopy (UV-vis), X-ray absorption spectroscopy (XAS) to characterize the formation process of Au-Ag alloy. Although the average particle sizes of the Au-Ag alloy nanoparticles obtained by the galvanic replacement reaction are relatively large comparing with that of loading Au first, the catalytic activity of the catalyst in preferential CO oxidation is almost the same. This result manifested that the particle size effect of Au-Ag nanoparticles was not as tremendous as that of monometallic gold. The formation of Au-Ag alloy made it less sensitive to the particle size. (C) 2013 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.
关键词[WOS]: GOLD-SILVER ALLOY ;  CO OXIDATION ;  CATALYTIC-ACTIVITY ;  MESOPOROUS SUPPORT ;  NANOPOROUS GOLD ;  PHASE SYNTHESIS ;  SIZE ;  NANOSTRUCTURES ;  NANOCLUSTERS ;  NANOCRYSTALS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000322933700012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119562
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 116023, Peoples R China
2.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
3.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

Recommended Citation:
Liu, Xiaoyan,Wang, Aiqin,Li, Lin,et al. Synthesis of Au-Ag alloy nanoparticles supported on silica gel via galvanic replacement reaction[J]. PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,2013,23(3):317-325.
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