A new strategy for the fabrication of covalent organic framework-metal-organic framework hybrids via in-situ functionalization of ligands for improved hydrogen evolution reaction activity

作者：Zheng, Ling-Ling; Zhang, Long-Shuai^*; Chen, Ying; Tian, Lei; Jiang, Xun-Heng; Chen, Li-Sha; Xing, Qiu-Ju; Liu, Xiao-Zhen; Wu, Dai-She; Zou, Jian-Ping^*

来源：CHINESE JOURNAL OF CATALYSIS, 2022, 43(3): 811-819.

DOI：10.1016/S1872-2067(21)63892-5

• Metal-organic frameworks
• Covalent organic frameworks
• COF/MOF hybrid
• In-situ
• Hydrogen evolution

The development of novel porous materials have attracted significant attention owing to its possible application in several fields. In this study, we designed a novel covalent organic framework-metal-organic framework (COF-MOF) material through an in-situ ligand self-assembly method. The in-situ modified ligands not only act as nucleation sites to form Ti-MOF, but also as a channel to rapidly transfer photogenerated electrons without introducing additional chemical bonds. The photocatalytic hydrogen production rate achieved over B-CTF-Ti-MOF(1:1) was 1975 mu mol.g(-1).h(-1) with an apparent quantum efficiency of 4.76%, which is 11.8 times higher than that of the pure CTF-1. In addition, compared with the sample prepared by separating the ligands (CTF-1/Ti-MOF), B-CTF-Ti-MOF shows excellent activity and stability. Finally, a reasonable photocatalytic mechanism was proposed using the results of electrochemical tests and spectral analyses. This study provides a universal method for the construction of highly efficient and stable COF/MOF materials with excellent properties.

• 单位
  南昌大学; 南昌航空大学