文献类型：期刊文献

英文题名：New Insights into Electrocatalysis Based on Plasmon Resonance for the Real-Time Monitoring of Catalytic Events on Single Gold Nanorods

作者：Jing, Chao[1,2];Rawson, Frankie James[3];Zhou, Hao[1,2];Shi, Xin[1,2];Li, Wen-Hui[1,2];Li, Da-Wei[1,2];Long, Yi-Tao[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Univ Nottingham, Sch Pharm, Lab Biophys & Surface Anal, Nottingham NG7 2NR, England

年份：2014

卷号：86

期号：11

起止页码：5513

外文期刊名：ANALYTICAL CHEMISTRY

收录：;EI(收录号：20142417808599);WOS:【SCI-EXPANDED(收录号:WOS:000336953100045)】；

基金：This research was supported by 973 Program (2013CB733700), National Science Fund for Distinguished Young Scholars (21125522), and the National Natural Science Foundation of China (21327807).

语种：英文

外文关键词：Quantum chemistry - Fiber optic sensors - Metal nanoparticles - Surface plasmon resonance - Catalytic oxidation - Catalyst activity - Electrocatalysis - Chlorine compounds - Nanorods

摘要：Gold nanoparticles (GNPs) have been widely applied in industrial catalysis and electrocatalysis. Owing to their wide variety of shapes, sizes, and compositions, a range of different catalytic properties is possible. Thus, it is important to monitor catalytic processes and their mechanisms on single GNP surfaces to avoid averaging effects in bulk systems. Therefore, a novel method based on dark-field scattering spectroscopy was developed to monitor, in real-time, the electrocatalytic oxidation of hydrogen peroxide on a single gold nanoparticle surface. The catalytic mechanism was revealed via the plasmon resonance scattering spectral shift of single gold nanorod with the elimination of bulk effect. Moreover, we found that the presence of chloride ions could block the catalytic activity of nanorods for the oxidation of H2O2. Most importantly, it was discovered that individual nanoparticles have variable properties with different spectra shifts during the catalytic process. The obtained optical signals from individual nanorods not only offer versatile information regarding the reaction but also improve the understanding of electrochemistry and the catalysis mechanism of single nanoparticles.