School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China.
ACS Appl Mater Interfaces. 2014 Oct 8;6(19):17075-81. doi: 10.1021/am504709a. Epub 2014 Sep 22.
Here, we present an Au@Pt core-shell 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.
在这里，我们提出了一种 Au@Pt 核壳多分支纳米粒子作为新的基底，能够进行原位表面增强拉曼散射（SERS），从而能够监测活性表面上的催化反应。通过仔细控制沉积的 Pt 量，得到了在 SERS 和催化活性方面都具有中等性能的双金属 Au@Pt 纳米粒子。选择硼氢化钠还原 4-硝基噻吩作为模型反应。通过 SERS 光谱学捕获并清晰地识别了反应过程中的中间产物。我们建立了原位 SERS 光谱学作为一种有前途和强大的技术，用于研究异相催化中发生的原位反应。
