Nb2C MXene assisted CoNi bimetallic catalysts for hydrogenolysis of aromatic ethers
Nb2C MXene assisted CoNi bimetallic catalysts for hydrogenolysis of aromatic ethers
复制标题
Nb2C MXene辅助CoNi双金属催化剂用于芳香醚氢解
DOI：
10.1039/d0se01532f
复制
发表时间：
--
影响因子：
5.6
通讯作者：
Zhao-Tie Liu
中科院分区：
文献类型：
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作者：
Sen-Wang Wang;Zhen-Hong He;Jian-Gang Chen;Kuan Wang;Zhong-Yu Wang;Pan-Pan Guo;Jie Lan;Weitao Wang;Zhao-Tie Liu
生物质衍生的木质素源的氢解对于将可再生生物质资源转化为生物燃料非常重要。然而，许多开发的催化剂具有昂贵的贵金属催化剂和/或在苛刻条件下操作的缺点。本文制备了Co-Ni双金属催化剂，并在Nb_2C MXene助剂的促进下，对芳香醚氢解反应进行了催化活性研究。特别是在Co_2Ni_1 Ox-Nb_2CMXene催化体系中，4-O-5模型化合物二苯醚（DPE）在120 °C和5 bar氢气压力下可以氢解生成环己烷（cy）和环己醇（cy-ol），与已开发的非均相无贵金属催化剂相比条件温和。这种优异的催化性能源于Co和Ni物种之间的强相互作用和Nb 2C MXene提供的刘易斯酸中心的促进作用。该反应途径涉及DPE的直接氢解途径，其中DPE首先氢解为苯和苯酚。它们被进一步氢化成cy和cy-ol。本工作不仅开发了一种用于利用生物质衍生木质素来源的无贵金属催化剂，而且还为使用Nb 2C MXene材料提供了一种新的策略。
Hydrogenolysis of biomass-derived lignin sources is highly important for the conversion of renewable biomass resources to biofuels. However, lots of developed catalysts suffer from the drawbacks of expensive precious metal catalysts and/or operation under harsh conditions. In the present work, Co–Ni bimetallic catalysts were prepared and applied in catalyzing hydrogenolysis of Caryl–O aromatic ethers with high activities under the promotion of Nb2C MXene additive. Especially, the hydrogenolysis of diphenyl ether (DPE), a 4–O–5 model compound, to cyclohexane (cy) and cyclohexyl alcohol (cy-ol) could be achieved over the Co2Ni1Ox–Nb2C MXene catalytic system at 120 °C and under 5 bar of H2, which are mild conditions in comparison with those for the developed heterogeneous precious-metal-free catalysts. The excellent catalytic performances stemmed from the strong interaction between Co and Ni species and the promotion of Lewis acidic sites offered by Nb2C MXene. The proposed reaction pathway involved the direct hydrogenolysis of DPE route, in which DPE was initially hydrogenolyzed to benzene and phenol. They were further hydrogenated to cy and cy-ol. The present work not only develops a noble-metal-free bimetallic catalyst for utilization of biomass-derived lignin sources, but also provides a novel strategy for using the Nb2C MXene material.