催化作用
材料科学
原位
拉曼光谱
金属
分子
贵金属
纳米颗粒
等离子体子
光化学
化学工程
化学
纳米技术
有机化学
冶金
光电子学
工程类
光学
物理
作者
Xia Zhou,Haiqiu Huang,Yingqi Yang,Hanlin Zhou,Ruiyu Liang,Yijing Zhao,Qingya Cui,Yawen Tang,Siyu Chen,Pan Li,Huaihong Cai,Ping Sun,Wei Xu,Wanyong Yang,Haibo Zhou
标识
DOI:10.1016/j.snb.2023.134385
摘要
In situ monitoring of the changes of reactants on the metal catalyst surface/interface, capture, and identification of intermediate species and products are very important for revealing catalytic pathways, mechanisms, and designing high-performance catalysts. A novel Au@AgPt yolk structure with ternary metallic composition and dendritic alloy shell was synthesized, which had dual catalytic and surface-enhanced Raman spectroscopy (SERS) performance to meet the demand of in-situ SERS monitoring reaction. The key factors for the formation of this special structure are the Ag-Pt mole ratio (nAg: Pt) and surfactant types. The yolk structure with the most optimal catalytic and SERS performance (nAg: Pt=1:1) was screened out for in-situ SERS monitoring. The classic 4-NTP reduction to 4-ATP model was first used to verify the excellent SERS and catalytic dual-functional properties of the Au@AgPt yolk structure. Importantly, this yolk structure was further used to detect plasmon-induced halogenated benzene dehalogenated coupling reaction, and the results show that the hot electrons generated by Au@AgPt NPs could trigger C-X (X = Cl, Br) bond fracture to form the C-C bond under continuous laser irradiation, which provided an effective way for C-X bond activation in organic synthesis.
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