Facile solution synthesis of Ag@Pt core-shell nanoparticles with dendritic Pt shells
Facile solution synthesis of Ag@Pt core-shell nanoparticles with dendritic Pt shells
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DOI：
10.1039/c3cp44313b
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发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Yamauchi, Yusuke
中科院分区：
文献类型：
--
作者：
Li, Cuiling;Yamauchi, Yusuke
采用非离子表面活性剂在室温下成功地合成了具有多种树枝状Pt壳层的Ag@Pt纳米粒子。我们最近的研究表明，添加非离子表面活性剂在树枝状Pt纳米结构的合成中起着重要的关键作用（J. Am.化学会，2010，132，13636）。在这里，我们扩展这种合成概念，以制备各种Ag@Pt纳米结构。紫外-可见吸收光谱和透射电子显微镜证实了不同的纳米结构的Pt壳上的银核。作为初步的电化学应用，将所获得的Ag@ Pt纳米结构应用于在含有0.5 M甲醇的0.5 M H2SO 4溶液中的甲醇氧化反应（莫尔）中。具有薄树枝状Pt壳的Ag@Pt纳米颗粒显示出上级CO耐受性能，I-f/I-b值达到3.71。我们的Ag@Pt纳米结构具有良好的CO耐受活性，将是莫尔还原的突出催化剂。
Ag@Pt nanoparticles with various dendritic Pt shells were successfully synthesized by using nonionic surfactants at room temperature. Our recent study demonstrated that the addition of nonionic surfactant plays an important key role in the synthesis of dendritic Pt nanostructures (J. Am. Chem. Soc., 2010, 132, 13636). Here we extend this synthetic concept to prepare various Ag@Pt nanoarchitectures. The different nanostructured Pt shells on the Ag core were confirmed by ultraviolet-visible absorption spectroscopy and transmission electron microscopy. As a preliminary electrochemical application, the obtained Ag@ Pt nanostructures were applied in the methanol oxidation reaction (MOR) in 0.5 M H2SO4 solution containing 0.5 M methanol. The Ag@Pt nanoparticles with thin dendritic Pt shells show superior CO-tolerance performance with a I-f/I-b value reaching 3.71. Our Ag@Pt nanostructures with good CO tolerant activity will be prominent catalysts for MOR.