PdCu/alpha-Fe2O3 催化剂的形态对 Suzukii-Miyaura 交叉偶联反应的支撑效应

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL Particuology Pub Date : 2024-08-29 DOI:10.1016/j.partic.2024.08.007

Ying Zhang , Chengshan Dai , Hongyu Fan , Junnan Chen , Li Gao , Bingsen Zhang

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引用次数: 0

摘要

钯催化的Suzuki-Miyaura交叉偶联（SMC）反应作为生成双芳基化合物的一种强大而便捷的合成工具，受到了全世界的关注。然而，这些反应高度依赖于催化剂的活性和稳定性。本文研究了 SMC 反应的催化性能与载体形态的关系。采用 NaBH4 还原法制备 PdCu 纳米颗粒 (NPs) 催化剂时，使用了截顶六角形双锥体 (α-Fe2O3-O)和杆状形态的α-Fe2O3 (α-Fe2O3-R)作为载体。在 PdCu/α-Fe2O3-R 催化剂中，PdCu NPs 的尺寸较小，低配位钯位点较多，因此在 SMC 反应中具有优异的催化性能。此外，该催化剂可通过离心分离轻松回收并多次重复使用，其催化性能不会明显下降。采用同位透射电子显微镜方法研究了 PdCu/α-Fe2O3-R 催化剂的结构演变。结果发现，其结构在催化反应过程中几乎没有变化。

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Morphology-dependent support effect of PdCu/alpha-Fe2O3 catalysts on Suzuki-Miyaura cross-coupling reaction

The palladium-catalyzed Suzuki-Miyaura cross-coupling (SMC) reaction has received worldwide attention as a powerful and convenient synthetic tool for the formation of biaryl compounds. However, these reactions are highly dependent on the activity and stable of catalysts. Herein, the support morphology-dependent catalytic performance of SMC reactions was investigated. The truncated hexagonal bipyramid (α-Fe₂O₃-O) and rod-shaped morphologies of alpha-Fe₂O₃ (α-Fe₂O₃-R) were used as support to prepare PdCu nanoparticles (NPs) catalysts by NaBH₄ reduction method. For PdCu/α-Fe₂O₃-R catalysts, the smaller size of PdCu NPs and more low coordination Pd sites leading to its superior catalytic performance for SMC reactions. Furthermore, it can be easily recycled through centrifugation and reused several times without obvious loss on its catalytic performance. Identical location transmission electron microscopy method was used to investigate the structural evolution of PdCu/α-Fe₂O₃-R catalysts. The results found that its structure almost unchanged during the catalytic reaction.

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.