Journal
CHEM
Volume 5, Issue 6, Pages 1521-1536Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2019.03.007
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Funding
- National Natural Science Foundation of China [21832002, 21872050, 21808063, 91545103]
- Science and Technology Commission of Shanghai Municipality [2018SHZDZX03]
- Programme of Introducing Talents of Discipline to Universities in China [B16017]
- Fundamental Research Funds for the Central Universities [222201718003]
- University of Manchester
- Royal Society
- Engineering and Physical Sciences Research Council in the UK [EP/P011632/1]
- EPSRC [EP/P011632/1] Funding Source: UKRI
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Conversion of lignin into monocyclic hydrocarbons as commodity chemicals and drop-in fuels is a highly desirable target for biorefineries. However, this is severely hindered by the presence of stable interunit carbon-carbon linkages in native lignin and those formed during lignin extraction. Herein, we report a newmultifunctional catalyst, Ru/NbOPO4, that achieves the first example of catalytic cleavage of both interunit C-C and C-O bonds in one-pot lignin conversions to yield 124%-153% of monocyclic hydrocarbons, which is 1.2-1.5 times the yields obtained from the established nitrobenzene oxidation method. This catalyst also exhibits high stability and selectivity (up to 68%) to monocyclic arenes over repeated cycles. The mechanism of the activation and cleavage of 5-5 C-C bonds in biphenyl, as a lignin model adopting the most robust C-C linkages, has been revealed via in situ inelastic neutron scattering coupled with modeling. This study breaks the conventional theoretical limit on lignin monomer production.
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