Fabrication of Au@Pt Multibranched Nanoparticles and Their Application to In Situ SERS Monitoring
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- 作者：Qianling Cui ; Guizhi Shen ; Xuehai Yan ; Lidong Li ; Helmuth M枚hwald ; Matias Bargheer
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：October 8, 2014
- 年：2014
- 卷：6
- 期：19
- 页码：17075-17081
- 全文大小：423K
- ISSN：1944-8252
文摘
Here, we present an Au@Pt core鈥搒hell multibranched nanoparticle as a new substrate capable of in situ surface-enhanced Raman scattering (SERS), thereby enabling monitoring of the catalytic reaction on the active surface. By careful control of the amount of Pt deposited bimetallic Au@Pt, nanoparticles with moderate performance both for SERS and catalytic activity were obtained. The Pt-catalyzed reduction of 4-nitrothiophenol by borohydride was chosen as the model reaction. The intermediate during the reaction was captured and clearly identified via SERS spectroscopy. We established in situ SERS spectroscopy as a promising and powerful technique to investigate in situ reactions taking place in heterogeneous catalysis.