Submonolayer-Pt-Coated Ultrathin Au Nanowires and Their Self-Organized Nanoporous Film: SERS and Catalysis Active Substrates for Operando SERS Monitoring of Catalytic Reactions.
Submonolayer-Pt-Coated Ultrathin Au Nanowires and Their Self-Organized Nanoporous Film: SERS and Catalysis Active Substrates for Operando SERS Monitoring of Catalytic Reactions.
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DOI：
10.1021/jz500238z
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Rui Liu;Jing-fu Liu;Zongmian Zhang;Li-qiang Zhang;Jiefang Sun;Mengjun Sun;G. Jiang
中科院分区：
文献类型：
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作者：
Rui Liu;Jing-fu Liu;Zongmian Zhang;Li-qiang Zhang;Jiefang Sun;Mengjun Sun;G. Jiang
由于其独特的性质，核壳双金属纳米结构目前受到极大的关注。然而，它们的合成不是一项微不足道的工作，大多数工作都是在纳米颗粒上进行的。本文报道了一种新的亚单分子铂包覆超薄金纳米线的合成策略。除了为增强拉曼信号提供强大的电磁场外，带线的Au NWs还通过增加Pt原子的分散性和改变其电子态来显著增强Pt原子的催化活性。在Au@Pt NWs中集成了优异的SERS和高催化活性，使其成为催化反应研究的平台。作为原理证明，自组织Au@Pt NWs薄膜被用于对硝基苯酚还原过程的操作SERS监测。除了为结构-活性关系的研究提供动力学数据外，还直接见证了偶氮中间体的独立路径。这种合成策略可以扩展到其他金属，从而提供了一种通用的方法来调节芯金属和壳金属的物理/化学性质。
For their unique properties, core-shell bimetal nanostructures are currently of immense interest. However, their synthesis is not a trivial work, and most works have been conducted on nanoparticles. We report herein a new synthetic tactic for submonolyer-Pt coated ultrathin Au nanowires (NWs). Besides providing a strong electromagnetic field for Raman signal enhancing, the underlined Au NWs markedly enhanced the catalytic activity of Pt atoms through increasing their dispersity and altering their electronic state. The integration of excellent SERS and high catalytic activity within Au@Pt NWs enable it work as platform for catalyzed reaction study. As a proof of principle, the self-organized Au@Pt NWs thin film is employed in operando SERS monitoring of the p-nitrothiophenol reduction process. In addition to providing kinetic data for structure-activity relationship study, the azo-intermidate independent path is also directly witnessed. This synthetic tactic can be extended to other metals, thus offering a general approach to modulate the physical/chemical properties of both core and shell metals.