Crystalline order of silver-gold nanocatalysts with hollow-core and alloyed-shell
Crystalline order of silver-gold nanocatalysts with hollow-core and alloyed-shell
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DOI：
10.1016/j.cattod.2009.02.047
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发表时间：
2009-10-15
期刊：
影响因子：
5.3
通讯作者：
Jose-Yacaman, Miguel
中科院分区：
文献类型：
--
作者：
Ferrer, Domingo A.;Diaz-Torres, Luis A.;Jose-Yacaman, Miguel
本文报道了由金属前体化学还原和随后的电置换反应合成的具有中空内部和合金外壳的Ag-Au纳米粒子的内部结构。利用高分辨透射电子显微镜（HRTEM）、扫描电子显微镜（STEM）、弱束暗场（WBDF）显微镜、X射线能量色散谱（EDS）和纳米束电子衍射（NBD）等先进的电子显微镜手段，充分和必要的证据证实了银纳米颗粒作为富金原子层外延沉积模板的牺牲作用。(C)2009年由Elsevier B. V.出版
This paper reports the internal structure of Ag-Au bimetallic nanoparticles with hollow interiors and alloyed shells, synthesized by chemical reduction of metallic precursor and subsequent galvanic replacement reaction. By taking advantage of advanced electron microscopy methods such as high-resolution transmission electron microscopy (HRTEM), scanning TEM (STEM), weak beam dark-field (WBDF) microscopy, X-ray energy dispersive spectroscopy (EDS) and nano-beam electron diffraction (NBD), sufficient and necessary evidences confirm the sacrificial role of silver nanoparticles as templates for the epitaxial deposition of gold-rich atomic layers. (C) 2009 Published by Elsevier B.V.