Selective structural transformation of metal-organic frameworks for hydrogenation reaction
Year: 2025
Type: article
Abstract: The structure transformation of metal-organic frameworks (MOFs) is significant for expanding the MOF family and exploring new MOF properties; however, it remains a significant challenge. In this work, we showcase the structure transformation of an Hf-based MOF. This MOF, with different phases denoted as Hf-SDC (face-centered cubic (fcc)) and Hf-SDC (hexagonal close-packed (hcp)), was successfully synthesized under controlled synthesis conditions. Interestingly, we demonstrated that the obtained two different phase MOFs can be further transformed to amorphous Hf-SDC-Br(am) and semi-crystalline Hf-SDC-Br(sc) through a simple bromination reaction, which converts the rigid -C=C- bonds into flexible -C(Br)-C(Br)- bonds, leading to the three-dimensional fcc topology could no longer be preserved and disrupted the interlayer order of the hcp topology, resulting in the amorphous Hf-SDC-Br(am) and semi-crystalline Hf-SDC-Br(sc), respectively. Finally, as a proof-of-concept application, the semi-crystalline Hf-SDC-Br(sc) was used as a support to load with Pd nanoparticles, yielding a Pd/Hf-SDC-Br(sc) catalyst. Benefiting from the Br-Pd interaction and the retained partial structural order that facilitates mass transport of reactants, Pd/Hf-SDC-Br(sc) exhibited excellent catalytic performance in the conversion of vanillin to 2-methoxy-4-methylphenol, with a record turnover frequency of 1021 h−1. This work demonstrates the feasibility of the structure transformation of MOF through simple chemical reaction and highlights the importance of the structure transformation of MOFs for advanced catalysis.
Source: Nano Research
Authors: Yue Wan, Meina Song, Qingyun Zhang, Shaopeng Li, Aijie Ma, Hong Wang, Jun Guo, Zhifang Wang, Bingqing Wang, Meiting Zhao
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,290
OpenAlex ID: W4415642209