Shape- and Size-Controlled Synthesis in Hard Templates: Sophisticated Chemical Reduction for Mesoporous Monocrystalline Platinum Nanoparticles
Shape- and Size-Controlled Synthesis in Hard Templates: Sophisticated Chemical Reduction for Mesoporous Monocrystalline Platinum Nanoparticles
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DOI：
10.1021/ja2058617
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发表时间：
2011-09-21
影响因子：
15
通讯作者：
Yamauchi, Yusuke
中科院分区：
文献类型：
--
作者：
Wang, Hongjing;Jeong, Hu Young;Yamauchi, Yusuke
在这里，我们报告了一种新的硬模板策略，用于合成具有均匀形状和尺寸的介孔单晶Pt纳米颗粒（NPs）。以3D双连续介孔氧化硅（KIT-6）和2D介孔氧化硅（SBA-15）为硬模板，采用抗坏血酸控制化学还原法成功制备了介孔Pt纳米粒子。通过改变还原时间可以控制颗粒大小。有趣的是，由KIT-6制备的Pt复制品显示出多面体形态。Pt fcc结构的单一结晶性在整个颗粒上一致地延伸。
Here we report a novel hard-templating strategy for the synthesis of mesoporous monocrystalline Pt nanopartides (NPs) with uniform shapes and sizes. Mesoporous Pt NPs were successfully prepared through controlled chemical reduction using ascorbic acid by employing 3D bicontinuous mesoporous silica (KIT-6) and 2D mesoporous silica (SBA-15) as a hard template. The particle size could be controlled by changing the reduction time. Interestingly, the Pt replicas prepared from KIT-6 showed polyhedral morphology. The single crystallinity of the Pt fcc structure coherently extended over the whole particle.