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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Shape Evolution of Metal Nanoparticles in Water Vapor Environment
作者: Zhu, BE; Xu, Z; Wang, CL; Gao, Y
刊名: NANO LETTERS
出版日期: 2016
卷号: 16, 期号:4, 页码:2628—2632
关键词: IN-SITU ; ELECTRON-MICROSCOPY ; NANOCRYSTAL GROWTH ; AMMONIA-SYNTHESIS ; CO OXIDATION ; SURFACES ; CATALYST ; 1ST-PRINCIPLES ; INTERFACES ; MOLECULES
DOI: 10.1021/acs.nanolett.6b00254
通讯作者: Gao, Y (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China. ; Gao, Y (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China. ; Gao, Y (reprint author), Chinese Acad Sci, Shanghai Sci Res Ctr, Shanghai 201204, Peoples R China.
文章类型: 期刊文献
英文摘要: The structures of the metal nanoparticles are crucial for their catalytic activities. How to understand and even control the shape evolution of nanoparticles under reaction condition is a big challenge in heterogeneous catalysis. It has been proved that many reactive gases hold the capability of changing the structures and properties of metal nano particles. One interesting question is whether water vapor, such a ubiquitous environment, could induce the shape evolution of metal nanoparticles. So far this question has not received enough attention yet. In this work, we developed a model based on the density functional theory, the Wulff construction, and the Langmuir adsorption isotherm to explore the shape of metal nanoparticle at given temperature and water vapor pressure. By this model, we show clearly that water vapor could notably increase the fraction of (110) facets and decrease that of (111) facets for 3-8 nm Cu nanoparticles, which is perfectly consistent with the experimental observations. Further investigations indicate the water vapor has different effects on the different metal species (Cu, Au, Pt, and Pd). This work not only helps to understand the water vapor effect on the structures of metal nanoparticles but also proposes a simple but effective model to predict the shape of nanoparticles in certain environment.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000374274600074
ISSN号: 1530-6984
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25831
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Zhu, BE,Xu, Z,Wang, CL,et al. Shape Evolution of Metal Nanoparticles in Water Vapor Environment[J]. NANO LETTERS,2016-01-01,16(4):2628—2632.
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