Nogami Masayuki, Koike Ryosuke, Jalem Randy, Kawamura Go, Yang Yong, Sasaki Yukichi
Nagoya Institute of Technology, Showa, Nagoya 466-8555 Japan.
Fine Ceramics Center, Atsuta, Nagoya, 456-8587 Japan.
J Phys Chem Lett. 2010 Jan 21;1(2):568-71. doi: 10.1021/jz900342q. Epub 2010 Jan 6.
Single-crystalline platinum nanocubes with porous morphology were synthesized for the first time by using ethylene glycol, HCl, and polyvinylpyrrolidone as the reducing agents of H2PtCl6. The morphology and size distribution of the Pt particles formed were studied with a high-resolution transmission electron microscope and selected-area electron diffraction pattern. By controlling the material concentrations and reaction temperature and period, Pt single crystals about 5 nm in size were formed in the first stage of the reduction process that had {100} facets, which were stacked one on top of the other, forming porous nanocubes 20-80 nm in length. The synthesized Pt nanocubes exhibited enhanced catalytic activity for methanol oxidation.
首次以乙二醇、盐酸和聚乙烯吡咯烷酮作为六氯铂酸的还原剂，合成了具有多孔形态的单晶铂纳米立方体。利用高分辨率透射电子显微镜和选区电子衍射图研究了所形成的铂颗粒的形态和尺寸分布。通过控制材料浓度、反应温度和反应时间，在还原过程的第一阶段形成了尺寸约为5nm的铂单晶，其具有{100}晶面，这些晶面彼此堆叠，形成了长度为20-80nm的多孔纳米立方体。合成的铂纳米立方体对甲醇氧化表现出增强的催化活性。
