当前位置: X-MOL 学术Mol. Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
In-situ one-step deposition of highly dispersed palladium nanoparticles into zirconium metal–organic framework for selective hydrogenation of furfural
Molecular Catalysis ( IF 4.6 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.mcat.2021.111859
Samaneh Sohrabi 1 , Reza Khaleghi Abasabadi 1 , Abbas Ali Khodadadi 1 , Yadollah Mortazavi 1 , Ali Hoseinzadeh 1
Affiliation  

Palladium nanoparticles highly dispersed into UiO-66 as an efficient and selective hydrogenation catalyst is synthesized by a one-step in-situ method of incorporation of the Pd centers on the secondary building units (SBUs) of UiO-66 as the support and compared to a two-step method. Using DMF as both a solvent and a reducing agent, HCl as an enhancer of the terminal OH groups on Zr-clusters by linker elimination, and a temperature profile result in the incorporation of Pd precursor at lower temperatures and generation of Pd nanoparticles at higher temperatures. The catalysts were characterized by BET surface area measurement, SEM, XRD, HR-TEM, XPS, H2-TPR, and CO pulse chemisorption methods. The regulation of the temperature and time in the one-step method results in the formation of Pd nanoparticles embedded in the MOF with a higher dispersion and accessibility in comparison to the two-step method. An automated high-pressure semicontinuous setup was used for the furfural hydrogenation. The 1 wt% Pd on UiO-66 exhibits a high conversion of 71% and selectivity of 94% for hydrogenation of furfural to furfuryl alcohol in the liquid phase at 20 bar H2, 110 ˚C and 4 h reaction. The catalyst was used repeatedly without significant deactivation.



中文翻译:

将高度分散的钯纳米颗粒原位一步沉积到锆金属-有机骨架中,用于糠醛的选择性加氢

钯纳米颗粒高度分散到 UiO-66 中作为一种高效和选择性的加氢催化剂,通过一步原位法将 Pd 中心结合在 UiO-66 的二级构建单元 (SBU) 上作为载体合成,并与两步法。使用 DMF 作为溶剂和还原剂,HCl 作为 Zr 簇上末端 OH 基团的增强剂,通过连接体消除,温度曲线导致 Pd 前体在较低温度下结合,在较高温度下生成 Pd 纳米颗粒. 通过BET表面积测量、SEM、XRD、HR-TEM、XPS、H 2对催化剂进行表征-TPR 和 CO 脉冲化学吸附方法。与两步法相比,一步法中温度和时间的调节导致嵌入 MOF 中的 Pd 纳米颗粒的形成具有更高的分散性和可及性。糠醛氢化使用自动高压半连续装置。UiO-66 上的 1 wt% Pd 在 20 bar H 2、110 ˚C 和 4 小时反应条件下,在液相中糠醛氢化为糠醇方面表现出 71% 的高转化率和 94% 的选择性。催化剂重复使用而没有明显失活。

更新日期:2021-09-10
down
wechat
bug