Wang Hai, Wang Liang, Xiao Feng-Shou
Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China.
ACS Cent Sci. 2020 Oct 28;6(10):1685-1697. doi: 10.1021/acscentsci.0c01130. Epub 2020 Sep 25.
The fixation of metal nanoparticles into zeolite crystals has emerged as a new series of heterogeneous catalysts, giving performances that steadily outperform the generally supported catalysts in many important reactions. In this outlook, we define different noble metal-in-zeolite structures (metal@zeolite) according to the size of the nanoparticles and their relative location to the micropores. The metal species within the micropores and those larger than the micropores are denoted as encapsulated and fixed structures, respectively. The development in the strategies for the construction of metal@zeolite hybrid materials is briefly summarized in this work, where the rational preparation and improved thermal stability of the metal nanostructures are particularly mentioned. More importantly, these metal@zeolite hybrid materials as catalysts exhibit excellent shape selectivity. Finally, we review the current challenges and future perspectives for these metal@zeolite catalysts.
将金属纳米颗粒固定在沸石晶体中已成为一系列新型的多相催化剂，在许多重要反应中其性能持续优于一般的负载型催化剂。在本展望中，我们根据纳米颗粒的尺寸及其与微孔的相对位置定义了不同的沸石负载贵金属结构（金属@沸石）。微孔内的金属物种和大于微孔的金属物种分别表示为封装结构和固定结构。本文简要总结了构建金属@沸石杂化材料策略的发展，特别提到了金属纳米结构的合理制备和热稳定性的提高。更重要的是，这些作为催化剂的金属@沸石杂化材料表现出优异的形状选择性。最后，我们综述了这些金属@沸石催化剂当前面临的挑战和未来前景。
