催化作用
拉曼光谱
纳米颗粒
原位
表征(材料科学)
成核
光谱学
纳米技术
材料科学
化学
化学工程
有机化学
物理
工程类
量子力学
光学
作者
Jie Wei,Si-Na Qin,Ji Yang,Han-Long Ya,Wei-Hsiang Huang,Hua Zhang,Bing-Joe Hwang,Zhong-Qun Tian,Jian-Feng Li
标识
DOI:10.1002/ange.202100198
摘要
Developing advanced characterization techniques for single-atom catalysts (SACs) is of great significance to identify their structural and catalytic properties. Raman spectroscopy can provide molecular structure information, and thus, the technique is a promising tool for catalysis. However, its application in SACs remains a great challenge because of its low sensitivity. We develop a highly sensitive strategy that achieves the characterization of the structure of SACs and in situ monitoring of the catalytic reaction processes on them by shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) for the first time. Using the strategy, Pd SACs on different supports were identified by Raman spectroscopy and the nucleation process of Pd species from single atoms to nanoparticles was revealed. Moreover, the catalytic reaction processes of the hydrogenation of nitro compounds on Pd SACs were monitored in situ, and molecular insights were obtained to uncover the unique catalytic properties of SACs. This work provides a new spectroscopic tool for the in situ study of SACs, especially at solid–liquid interfaces.
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