Wang Kaixuan, Zhao Weiliang, Zhang Qingxiao, Li Hexing, Zhang Fang
School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
ACS Omega. 2020 Jun 25;5(26):16183-16188. doi: 10.1021/acsomega.0c01759. eCollection 2020 Jul 7.
A facile in situ one-step route for the preparation of platinum nanoparticles supported on metal-organic frameworks (MOFs) without adding stabilizing agents was developed. The obtained 10% Pt@MOF-T3 material possessed a large surface area and high crystallinity. Meanwhile, uniform and well-dispersed platinum nanoparticles were formed inside the cavities of MOFs, which could be attributed to the efficient complexation and stabilization effect derived from the dipyridyl groups. The as-synthesized 10% Pt@MOF-T3 sample showed high activity and selectivity in the hydrogenation of 5-hydroxymethylfurfural (HMF). This excellent catalytic performance could be attributed to the synergistic effects of well-dispersed platinum nanoparticles and electron donation offered by MOFs. Meanwhile, the presence of bipyridine ligands in the MOF framework avoided the irreversible adsorption of the hydrocarbon compounds, leading to the enhanced catalytic efficiency. Besides, it was easily recycled and reused at least five times, showing good recyclability.
开发了一种简便的原位一步法，用于制备负载在金属有机框架（MOF）上的铂纳米颗粒，无需添加稳定剂。所得的10% Pt@MOF-T3材料具有大表面积和高结晶度。同时，在MOF的孔腔内形成了均匀且分散良好的铂纳米颗粒，这可归因于二吡啶基团产生的有效络合和稳定作用。合成的10% Pt@MOF-T3样品在5-羟甲基糠醛（HMF）的氢化反应中表现出高活性和选择性。这种优异的催化性能可归因于分散良好的铂纳米颗粒与MOF提供的电子给予的协同效应。同时，MOF框架中联吡啶配体的存在避免了烃类化合物的不可逆吸附，从而提高了催化效率。此外，它易于回收再利用，至少可重复使用五次，显示出良好的可回收性。
