Shape Evolution of Metal Nanoparticles in Water Vapor Environment

doi:10.1021/acs.nanolett.6b00254

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Shape Evolution of Metal Nanoparticles in Water Vapor Environment
	Zhu, BE; Xu, Z; Wang, CL; Gao, Y; 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.
	2016
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	16 期号:4 页码:2628—2632
文章类型	期刊文献
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.
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000374274600074
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/25831
专题	中科院上海应用物理研究所2011-2018年
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.
推荐引用方式 GB/T 7714	Zhu, BE,Xu, Z,Wang, CL,et al. Shape Evolution of Metal Nanoparticles in Water Vapor Environment[J]. NANO LETTERS,2016,16(4):2628—2632.
APA	Zhu, BE.,Xu, Z.,Wang, CL.,Gao, Y.,Gao, Y .,...&Gao, Y .(2016).Shape Evolution of Metal Nanoparticles in Water Vapor Environment.NANO LETTERS,16(4),2628—2632.
MLA	Zhu, BE,et al."Shape Evolution of Metal Nanoparticles in Water Vapor Environment".NANO LETTERS 16.4(2016):2628—2632.

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