Shimazaki Yuzuru, Kobayashi Yoshio, Yamada Shinji, Miwa Takao, Konno Mikio
Advanced Research Laboratory, Hitachi Ltd., 7-1-1 Omika-cho, Hitachi 319-1292, Japan.
J Colloid Interface Sci. 2005 Dec 1;292(1):122-6. doi: 10.1016/j.jcis.2005.05.052. Epub 2005 Jul 21.
A synthetic method for platinum-ruthenium (PtRu) nanoparticles in aqueous media is proposed. This method employs citric acid as a capping agent and NaBH(4) as a reducing agent with the aid of pH control. The number-averaged size of the PtRu nanoparticles was ca. 2 nm. The crystal phase and chemical composition of the nanoparticles was investigated by X-ray diffraction measurement and scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis, which indicated that the nanoparticles mainly consisted of an alloy of Pt and Ru. Electrochemical measurement showed that the PtRu nanoparticles had catalytic activity for methanol oxidation.
提出了一种在水介质中合成铂钌（PtRu）纳米颗粒的方法。该方法借助pH控制，采用柠檬酸作为封端剂，硼氢化钠（NaBH₄）作为还原剂。PtRu纳米颗粒的数均尺寸约为2 nm。通过X射线衍射测量以及扫描透射电子显微镜与能量色散X射线光谱分析相结合的方式研究了纳米颗粒的晶相和化学成分，结果表明纳米颗粒主要由Pt和Ru的合金组成。电化学测量表明，PtRu纳米颗粒对甲醇氧化具有催化活性。
