利用经 H2 处理的 MoS2 催化剂从生物基平台化合物中可持续、选择性地制备呋喃醚

IF 5.2 2区 化学 Q1 CHEMISTRY, APPLIED Catalysis Today Pub Date : 2024-08-08 DOI:10.1016/j.cattod.2024.114984
Jiaxin Zheng, Miao Wang, Xinli Tong, Ye Yuan
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引用次数: 0

摘要

催化选择性醚化 5- 羟甲基糠醛(5-HMF)被认为是从生物质原料中制备生物燃料的可行途径。在这项工作中,通过结合简便的水热法和还原法,合成了一种新型的固体酸催化剂,该催化剂来源于花状 MoS2。在这种催化剂中,通过改变氢退火条件,可以有效地调节来自 MoS2 暴露的 Mo 边缘的 Lewis 和 Bronsted 酸性位点的数量。制备的 MoS2-450-R 催化剂在氮气环境下通过乙缩醛和醚化串联反应将 5-HMF 转化为 5-(甲氧基甲基)呋喃醛二甲基缩醛(5-MFDMA)的过程中表现出显著的活性,其中 5-MFDMA 的转化率为 99.0%,选择性为 83.7%。进一步的研究发现,MoS2-450-R 中丰富的酸性位点在 5-HMF 与甲醇的反应中起着至关重要的作用。最后,根据催化剂的特性和反应现象,提出了 5-HMF 与甲醇乙缩醛化和醚化反应的可能反应网络。
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A sustainable and selective preparation of furanic ethers from bio-based platform compound with H2-treated MoS2 catalyst

The catalytic selective etherification of 5-hydroxymethyl furfural (5-HMF) is considered as a feasible route to prepare the biofuels from biomass feedstocks. In this work, a novel solid acid catalyst derived from the flower-like MoS2 is synthesized by combination of the facile hydrothermal method and reduction process. Therein, the number of Lewis and Bronsted acidic sites derived from the exposed Mo edges of MoS2 can be efficiently regulated by changing the hydrogen annealing conditions. The prepared MoS2-450-R catalyst exhibited a prominent activity for the conversion of 5-HMF to 5-(methoxymethyl)furanal dimethyl acetal (5-MFDMA) through the tandem acetalization and etherification under N2 atmosphere, in which a 99.0 % conversion with 83.7 % selectivity of 5-MFDMA is obtained. Further investigations revealed that the abundant acidic sites of MoS2-450-R plays a crucial role on the reaction of 5-HMF with methanol. Finally, based on the characterization of catalyst and reaction phenomena, a possible reaction network for the acetalization and etherification of 5-HMF with the methanol has been proposed.

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来源期刊
Catalysis Today
Catalysis Today 化学-工程:化工
CiteScore
11.50
自引率
3.80%
发文量
573
审稿时长
2.9 months
期刊介绍: Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.
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