Bifunctional Ag@Pd-Ag Nanocubes for Highly Sensitive Monitoring of Catalytic Reactions by Surface-Enhanced Raman Spectroscopy

被引：190

作者：

Li, Jumei ^{[1
,2
]}

Liu, Jingyue ^{[3
]}

Yang, Yin ^{[1
]}

Qin, Dong ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Jingdezhen Ceram Inst, Sch Mat Sci & Engn, Jingdezhen 333403, Jiangxi, Peoples R China

[3] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 22期

关键词：

HOLLOW NANOSTRUCTURES; GALVANIC REPLACEMENT; METAL NANOCRYSTALS; SERS ACTIVITY; AU; NANOPARTICLES; REDUCTION; GROWTH; MODEL; SCATTERING;

D O I：

10.1021/jacs.5b03528

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a route to the fatile synthesis of Ag@Pd-Ag nanocubes by cotitrating Na2PdCl4 and AgNO3 into an aqueous suspension of Ag nanocubes at room temperature in the presence of ascorbic acid and poly(vinylpyrrolidone). With an increase in the total titration volume, we observed the codeposition of Pd and Ag atoms onto the edges, corners, and side faces of the Ag nanocubes in a site-by-site fashion. By maneuvering the Pd/Ag ratio, we could optimize the SERS and catalytic activities of the Ag@Pd-Ag nanocubes for in situ SERS monitoring of the Pd-catalyzed reduction of 4-nitrothiophenol by NaBH4.

引用

页码：7039 / 7042

页数：4

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