Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University , Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan.
J Am Chem Soc. 2017 Apr 5;139(13):4643-4646. doi: 10.1021/jacs.7b01186. Epub 2017 Mar 24.
We report on novel solid-solution alloy nanoparticles (NPs) of Ru and Cu that are completely immiscible even above melting point in bulk phase. Powder X-ray diffraction, scanning transmission electron microscopy, and energy-dispersive X-ray measurements demonstrated that Ru and Cu atoms were homogeneously distributed in the alloy NPs. RuCu NPs demonstrated higher CO oxidation activity than fcc-Ru NPs, which are known as one of the best monometallic CO oxidation catalysts.
我们报告了一种新型的 Ru 和 Cu 固溶合金纳米粒子（NPs），即使在块状相的熔点以上也完全不混溶。粉末 X 射线衍射、扫描透射电子显微镜和能谱测量表明，Ru 和 Cu 原子均匀分布在合金 NPs 中。RuCu NPs 表现出比 fcc-Ru NPs 更高的 CO 氧化活性，后者被认为是最好的单金属 CO 氧化催化剂之一。
