Shape- and Size-Controlled Synthesis in Hard Templates: Sophisticated Chemical Reduction for Mesoporous Monocrystalline Platinum Nanoparticles

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• 作者：Hongjing Wang ; Hu Young Jeong ; Masataka Imura ; Liang Wang ; Logudurai Radhakrishnan ; Nobuhisa Fujita ; Toen Castle ; Osamu Terasaki ; Yusuke Yamauchi
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：September 21, 2011
• 年：2011
• 卷：133
• 期：37
• 页码：14526-14529
• 全文大小：759K
• 年卷期：v.133,no.37(September 21, 2011)
• ISSN：1520-5126

文摘

Here we report a novel hard-templating strategy for the synthesis of mesoporous monocrystalline Pt nanoparticles (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.