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题名: Generalized Fabrication of Nanoporous Metals (Au, Pd, Pt, Ag, and Cu) through Chemical Dealloying
作者: Zhang, Zhonghua1;  Wang, Yan2;  Qi, Zhen1;  Zhang, Wenhua3;  Qin, Jingyu1;  Frenzel, Jan4
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2009-07-23
DOI: 10.1021/jp811445a
卷: 113, 期:29, 页:12629-12636
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: Nanoporous metal ribbons including Au, Pd, Pt, Ag, and Cu can be fabricated through chemical dealloying of rapidly solidified Al-based alloys under free corrosion conditions. The formation and microstructure of these nanoporous metals have been investigated using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and high-resolution transmission electron microscopy. All metal ribbons exhibit an open, three-dimensional bicontinuous interpenetrating ligament-channel structure with nanometer length scales. For a given dealloying solution, the length scale of ligaments/channels in these nanoporous metals is associated with surface diffusion of more noble atoms, and increases with increasing diffusion coefficients in sequence: Pt/Pd < Au < Ag < Cu. In addition, the length scale of ligaments/channels of these nanoporous metals can be modulated by simply changing the dealloying solution. Nanoindentation tests show that Young's modulus and hardness of nartoporous gold are dependent upon the length scale of ligaments/channels. The electrical resistivity of these nanoporous metals is one to two orders of magnitude higher than that of their bulk counterparts. These nanoporous metals can be good candidates to probe the mechanical, physical, and chemical properties associated with random porous structures of nanoporous solids and will find wide applications in catalysis, sensors, actuators, fuel cells, and so forth.
关键词[WOS]: MECHANICAL-BEHAVIOR ;  MESOPOROUS PLATINUM ;  GOLD ;  ALLOYS ;  DISSOLUTION ;  CORROSION ;  DIFFUSION ;  LIQUID ;  EVOLUTION ;  OXIDATION
语种: 英语
WOS记录号: WOS:000268139800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141587
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.Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Sch Mat Sci & Engn, Minist Educ, Jinan 250061, Peoples R China
2.Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
4.Ruhr Univ Bochum, Inst Werkstoffe, D-44780 Bochum, Germany

Recommended Citation:
Zhang, Zhonghua,Wang, Yan,Qi, Zhen,et al. Generalized Fabrication of Nanoporous Metals (Au, Pd, Pt, Ag, and Cu) through Chemical Dealloying[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2009,113(29):12629-12636.
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