氢解
化学
乙醚
木质素
催化作用
键裂
劈理(地质)
有机化学
蒙脱石
硅醚
钌
合成法
环己醇
高分子化学
材料科学
硅烷化
复合材料
断裂(地质)
作者
Zhimin Xue,Haitao Yu,Jing He,Yibin Zhang,Lan Xue,Rundong Liu,Luyao Zhang,Tiancheng Mu
出处
期刊:Chemsuschem
[Wiley]
日期:2020-06-15
卷期号:13 (17): 4579-4586
被引量:19
标识
DOI:10.1002/cssc.202000978
摘要
Abstract Cleavage of ether bonds is a crucial but challenging step for lignin valorization. To efficiently realize this transformation, the development of robust catalysts or catalytic systems is required. In this study, montmorillonite (MMT)‐supported Ru (denoted as Ru/MMT) is fabricated as a dual‐functional heterogeneous catalyst to cleave various types of ether bonds through transfer hydrogenolysis without using any additional acids or bases. The prepared Ru/MMT material is found to efficiently catalyze the cleavage of various lignin models and lignin‐derived phenols; cyclohexanes (fuels) and cyclohexanols (key intermediates) are the main products. The synergistic effect between electron‐enriched Ru and the acidic sites on MMT contributes to the excellent performance of Ru/MMT. Systematic studies reveal that the reaction proceeds through two possible reaction pathways, including the direct cleavage of ether bonds and the formation of intermediates with one hydrogenated benzene ring, for all examined types of ether bonds, namely, 4‐O‐5, α‐O‐4, and β‐O‐4.
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