双金属片
材料科学
原电池
纳米结构
成核
催化作用
化学工程
多孔性
纳米技术
甲醇
冶金
复合材料
化学
有机化学
金属
工程类
作者
Weiqing Zhang,Jizheng Yang,Xianmao Lu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2012-07-18
卷期号:6 (8): 7397-7405
被引量:246
摘要
Here we report the synthesis of Pt/Ag bimetallic nanostructures with controlled number of void spaces via a tailored galvanic replacement reaction (GRR). Ag nanocubes (NCs) were employed as the template to react with Pt ions in the presence of HCl. The use of HCl in the GRR caused rapid precipitation of AgCl, which grew on the surface of Ag NCs and acted as a removable secondary template for the deposition of Pt. The number of nucleation sites for AgCl was tailored by controlling the amount of HCl added to the Ag NCs or by introducing PVP to the reaction. This strategy led to the formation of Pt/Ag hollow nanoboxes, dimers, multimers, or popcorn-shaped nanostructures consisting of one, two, or multiple hollow domains. Due to the presence of large void space and porous walls, these nanostructures exhibited high surface area and improved catalytic activity for methanol oxidation reaction.
科研通智能强力驱动
Strongly Powered by AbleSci AI