期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 362, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2023.112796
关键词
Covalent triazine-based frameworks; Palladium nanocluster; Heterogeneous catalysis; Aryl nitro reduction; Ullmann coupling
A series of covalent triazine-based frameworks (CTFs) were prepared by ionothermal synthesis and rearrangement, and CTF-immobilized nano-Pd(0) catalysts with different particle size distributions were successfully prepared using suspension impregnation-in-situ reduction. Among them, the smallest and highly dispersed Pd nanoclusters showed excellent activity and recyclability. This study provides new insights for the preparation of high-performance metal nano-catalysts.
The feasible preparation of Pd catalysts, one of the most widely used catalysts, with high performance and easy recovery still remains the greatest challenge. Covalent triazine-based frameworks (CTFs), by virtue of strong covalent linkages and abundant nitrogen atoms, have been deemed as a central subclass of porous supports for nano-functional materials including metal nanocatalysts. Herein, a series of CTFs have been prepared by ionothermal synthesis followed by rearrangement at higher temperatures (500-900 degrees C). The CTF-immobilized nano-Pd(0) catalysts with different particle size distributions (<0.5, 1.35 +/- 0.93, 2.21 +/- 1.43, 3.80 +/- 1.33, 6.10 +/- 3.23 nm) were then prepared by simply suspension impregnation-in-situ reduction. Among them, the smallest and highly dispersed Pd nanoclusters (Pd/CTF-600) exhibited excellent activity and outstanding recyclability in aryl nitro reduction and Ullmann coupling. The study provides a new insight for the preparation of high-performance metal nano-catalysts that could enable efficient chemical transformations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据