Hao Junfang, Liu Bin, Maenosono Shinya, Yang Jianhui
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069, People's Republic of China.
School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan.
Sci Rep. 2022 May 10;12(1):7615. doi: 10.1038/s41598-022-11756-x.
The conversion of p-nitrophenol (4-NP) to p-aminophenol (4-AP) is of great significance for pharmaceutical and material manufacturing. In this work, Au-M@SiO (M = Rh, Pd, Ir, Pt) nanoparticles (NPs) with core-shell structures, which are expected to be excellent catalysts for the transformation of 4-NP to 4-AP, were synthesized by a facile one-pot one-step method. The structure and composition of the NPs were characterized through transmission electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy. Au-M@SiO (M = Rh, Pd, Ir, Pt) core-shell NPs showed excellent catalytic activity in the reduction of 4-NP, which is superior to most catalysts reported in the previous literature. The enhanced catalytic activity of Au-M@SiO core-shell NPs is presumably related to the bimetallic synergistic effect. This study provides a simple strategy to synthesize core-shell bimetallic NPs for catalytic applications.
对硝基苯酚（4-NP）转化为对氨基酚（4-AP）在制药和材料制造方面具有重要意义。在本工作中，通过简便的一锅一步法合成了具有核壳结构的Au-M@SiO（M = Rh、Pd、Ir、Pt）纳米颗粒（NPs），有望成为将4-NP转化为4-AP的优异催化剂。通过透射电子显微镜、X射线粉末衍射和X射线光电子能谱对纳米颗粒的结构和组成进行了表征。Au-M@SiO（M = Rh、Pd、Ir、Pt）核壳纳米颗粒在4-NP的还原反应中表现出优异的催化活性，优于先前文献报道的大多数催化剂。Au-M@SiO核壳纳米颗粒催化活性的增强可能与双金属协同效应有关。本研究提供了一种合成用于催化应用的核壳双金属纳米颗粒的简单策略。
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