Acid-base bifunctional catalyst: Carboxyl ionic liquid immobilized on MIL-101-NH2 for rapid synthesis of propylene carbonate from CO2 and propylene oxide under facile solvent-free conditions

Acid-base bifunctional catalyst: Carboxyl ionic liquid immobilized on MIL-101-NH2 for rapid synthesis of propylene carbonate from CO2 and propylene oxide under facile solvent-free conditions
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酸碱双功能催化剂:固定在MIL-101-NH2上的羧基离子液体,用于在轻松的无溶剂条件下由CO2和环氧丙烷快速合成碳酸丙烯酯

DOI:
10.1016/j.micromeso.2018.03.011
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发表时间:
2018-09
影响因子:
5.2
通讯作者:
Min Ji
Min Ji
中科院分区:
材料科学2区
文献类型:
--
作者:
Tongtong Wang;Xuedan Song;Qun-Xing Luo;Xiaodong Yang;Siying Chong;Jie Zhang;Min Ji

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从"绿色化学"和"原子经济性"的角度来看,在不添加任何添加剂的情况下,CO2环加成生成环状碳酸酯是一种环境友好的CO2利用方式。然而,普通催化剂的CO2捕集量较低,限制了其催化效率。本文以MIL-101-NH2为载体,制备了一种新型的酸碱双功能催化剂(IL/MIL-101-NH2),并用于CO2和环氧丙烷(PO)快速合成碳酸丙烯酯(PC)。具有较强CO2化学捕获能力的刘易斯碱与具有较强氢键供体的Brønsted酸之间的协同作用,使得IL/MIL-101-NH2在无任何添加剂的情况下对CO2和PO合成碳酸酯具有较高的催化效率。MIL-101-NH2和IL之间的固定模式得到密度泛函理论(DFT)计算的有力支持。这种特定催化剂的设计思想和酸碱协同策略为CO2转化的强催化剂体系的设计提供了新的思路。
In terms of ‘green chemistry’ and ‘atom economy’, the cycloaddition of CO2 to yield cyclic carbonate without any additive is an eco-friendly way to utilize CO2. Unfortunately, the low CO2 capture quantity of common catalysts limited its catalytic efficiency. Herein, a novel acid-base bifunctional catalyst was successfully prepared by immobilizing ionic liquid on MIL-101-NH2 (IL/MIL-101-NH2) and tested for propylene carbonate (PC) rapid and facile synthesis from CO2 and propylene oxide (PO). The synergetic interaction between Lewis base with strong CO2 chemical capture capacity and Brønsted acid with strong hydrogen bond donor leads to the high catalytic efficiency of IL/MIL-101-NH2 for carbonate synthesis from CO2 and PO without any additive. The immobilization mode between MIL-101-NH2 and IL is energetically supported by the density functional theory (DFT) calculations. This design idea of specific catalyst and the acid-base synergetic strategy provides new insights into the design of powerful catalyst systems for the CO2 conversion.
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