Li Zhenxing, Xing Xiaofei, Meng Dong, Wang Zhengxu, Xue Jingjing, Wang Rui, Chu Junmei, Li Mingming, Yang Yang
State Key Laboratory of Heavy Oil Processing, Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, China; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
State Key Laboratory of Heavy Oil Processing, Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, China.
iScience. 2019 May 31;15:514-523. doi: 10.1016/j.isci.2019.05.006. Epub 2019 May 9.
As a major greenhouse gas, the continuous increase of carbon dioxide (CO) in the atmosphere has caused serious environmental problems, although CO is also an abundant, inexpensive, and nontoxic carbon source. Here, we use metal-organic framework (MOF) with highly ordered hierarchical structure as adsorbent and catalyst for chemical fixation of CO at atmospheric pressure, and the CO can be converted to the formate in excellent yields. Meanwhile, we have successfully integrated highly ordered macroporous and mesoporous structures into MOFs, and the macro-, meso-, and microporous structures have all been presented in one framework. Based on the unique hierarchical pores, high surface area (592 m/g), and high CO adsorption capacity (49.51 cm/g), the ordered macroporous-mesoporous MOFs possess high activity for chemical fixation of CO (yield of 77%). These results provide a promising route of chemical CO fixation through MOF materials.
作为一种主要的温室气体，大气中二氧化碳（CO₂）的持续增加已引发严重的环境问题，尽管CO₂也是一种储量丰富、价格低廉且无毒的碳源。在此，我们使用具有高度有序分级结构的金属有机框架（MOF）作为吸附剂和催化剂，用于在大气压下对CO₂进行化学固定，并且CO₂能够以优异的产率转化为甲酸盐。同时，我们已成功地将高度有序的大孔和中孔结构整合到MOF中，且大孔、中孔和微孔结构均呈现在一个框架内。基于独特的分级孔隙、高比表面积（592 m²/g）以及高CO₂吸附容量（49.51 cm³/g），有序大孔-中孔MOF对CO₂化学固定具有高活性（产率为77%）。这些结果为通过MOF材料进行化学固定CO₂提供了一条有前景的途径。
