文献类型：期刊文献

英文题名：Selective production of arenes via direct lignin upgrading over a niobium-based catalyst

作者：Shao, Yi[1];Xia, Qineng[1];Dong, Lin[1];Liu, Xiaohui[1];Han, Xue[2];Parker, Stewart F.[3];Cheng, Yongqiang[4];Daemen, Luke L.[4];Ramirez-Cuesta, Anibal J.[4];Yang, Sihai[2];Wang, Yanqin[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England;[3]STFC Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, Oxon, England;[4]Oak Ridge Natl Lab, Chem & Engn Mat Div, Neutron Sci Directorate, Oak Ridge, TN 37831 USA

年份：2017

卷号：8

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000406151500001)】；

基金：This project was financially supported by the National Natural Science Foundation of China (No. 91545103 21603072 and 21403065), the Science and Technology Commission of Shanghai Municipality (10dz2220500), the Fundamental Research Funds for the Central Universities (No. 222201718003), University of Manchester and the EPSRC (EP/P011632/1) in the United Kingdom. We are especially grateful to the Oak Ridge National Laboratory for access to Beamline VISION (supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy) and to Science and Technology Facilities Council (STFC) and the ISIS Neutron Facility for access to the Beamlines TOSCA. We thank Drs Pedro Duarte-Vaz and Svemir Rudic for help at TOSCA. Computing resources were provided by STFC e-Science facility (time on the SCARF cluster for the CASTEP calculations) and by the VirtuES (Virtual Experiments in Spectroscopy) and ICE-MAN (Integrated Computational Environment-Modeling & Analysis for Neutrons) projects, funded by Laboratory Directed Research and Development program at the Oak Ridge National Laboratory.

语种：英文

摘要：Lignin is the only large-volume renewable source of aromatic chemicals. Efficient depolymerization and deoxygenation of lignin while retaining the aromatic functionality are attractive but extremely challenging. Here we report the selective production of arenes via direct hydrodeoxygenation of organosolv lignin over a porous Ru/Nb2O5 catalyst that enabled the complete removal of the oxygen content from lignin. The conversion of birch lignin to monomer C-7-C-9 hydrocarbons is nearly quantitative based on its monomer content, with a total mass yield of 35.5 wt% and an exceptional arene selectivity of 71 wt%. Inelastic neutron scattering and DFT calculations confirm that the Nb2O5 support is catalytically unique compared with other traditional oxide supports, and the disassociation energy of C-aromatic-OH bonds in phenolics is significantly reduced upon adsorption on Nb2O5, resulting in its distinct selectivity to arenes. This one-pot process provides a promising approach for improved lignin valorization with general applicability.