Palladium clusters confined in triazinyl-functionalized COFs with enhanced catalytic activity

被引：100

作者：

Fan, Mengying ^{[1
]}

Wang, Wei David ^{[1
]}

Zhu, Yangyang ^{[1
]}

Sun, Xun ^{[2
]}

Zhang, Fengwei ^{[3
]}

Dong, Zhengping ^{[1
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lab Special Funct Mat & Struct Design,Minist Educ, Lanzhou 730000, Gansu, Peoples R China

[2] Yantai Univ, Sch Chem & Chem Engn, Shandong Appl Res Ctr Gold Nanotechnol Au SDARC, Yantai 264005, Peoples R China

[3] Shanxi Univ, Inst Crystalline Mat, Taiyuan 030006, Shanxi, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 257卷

关键词：

Palladium clusters; Triazinyl-functionalized COFs; Nitroaromatic compounds; Superior activity; Excellent stability; COVALENT ORGANIC FRAMEWORK; HIGHLY EFFICIENT CATALYST; PD NANOPARTICLES; REDUCTION; HYDROGENATION; CARBON; 4-NITROPHENOL; NANOSPHERES; GENERATION; STABILITY;

D O I：

10.1016/j.apcatb.2019.117942

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Noble-metal-cluster-based catalysts have attracted immense research attention due to their high atom utilization ratio and superior catalytic activity. However, it is still challenging to control the size growth of noble-metal clusters. Here, triazinyl-functionalized covalent organic frameworks (Triazinyl-COFs) with different pore diameters were synthesized by the condensation of cyanuric chloride with each of p-phenylenediamine and 4,4'-diaminobiphenyl, referred to as COF-Ph and COF-BPh, respectively. A simple synthetic strategy was employed for controlling the Pd clusters growth and anchoring Pd clusters based on the confinement effect of Triazinyl-COFs pores. The as-obtained Pd@COF-Ph and Pd@COF-BPh catalysts with a Pd cluster size of (similar to)0.8 nm exhibited superior activity and excellent stability for the reduction of 4-nitrophenol, attributing to the high utilization of Pd active sites and the confinement effect of Triazinyl-COFs. Besides, the influence of the different pore sizes of COF-Ph and COF-BPh on the catalytic performance of the obtained catalysts was also investigated.

引用

页数：9

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