Zhan Guowu, Zeng Hua Chun
Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
ACS Cent Sci. 2017 Jul 26;3(7):794-799. doi: 10.1021/acscentsci.7b00216. Epub 2017 Jul 11.
Particulate catalysts with streamline shapes have important impacts on fluid-related reactions, and they need to be properly characterized. However, utilization of streamline-shaped catalysts for heterogeneous catalysis has remained an unexplored area due to the lack of easy-to-use techniques to produce such shaped catalysts, especially at the small length scale of the submicron to micron regime. Herein, we report our recent development of a class of prototype nanocatalysts with streamline shapes. In this research, the kinetic control is adapted to obtain streamline-shaped supports, followed by functionalizing such supports with catalytically active metal nanoclusters (e.g., Au, Pd, Pt, and Ag or their combinations) in a stepwise manner. Advantages related to the streamline morphology of catalysts have been demonstrated with a number of solid-solution systems such as alcohol oxidation, olefin hydrogenation, and Suzuki-Miyaura coupling. We believe these findings will promote new research on the design and synthesis of functional materials with additional fluid-advanced features.
具有流线型形状的颗粒催化剂对与流体相关的反应具有重要影响，因此需要对其进行适当表征。然而，由于缺乏易于使用的技术来制备这种形状的催化剂，特别是在亚微米到微米尺度的小长度范围内，流线型催化剂在多相催化中的应用仍然是一个未被探索的领域。在此，我们报告了我们最近开发的一类具有流线型形状的原型纳米催化剂。在这项研究中，采用动力学控制来获得流线型载体，然后逐步用催化活性金属纳米团簇（如Au、Pd、Pt和Ag或它们的组合）对这些载体进行功能化。通过许多固溶体系统，如醇氧化、烯烃氢化和铃木-宫浦偶联反应，已经证明了与催化剂流线型形态相关的优势。我们相信这些发现将推动对具有额外流体先进特性的功能材料的设计和合成的新研究。
