Non-plasmonic Ni nanoparticles catalyzed visible light selective hydrogenolysis of aryl ethers in lignin under mild conditions

Light-driven catalysis on catalytically versatile group VIII metals, which has been widely used in thermal catalysis, holds great potential in solar-to-chemical conversion. We report a novel photocatalysis process for the selective hydrogenolysis of aryl ethers in lignin on a heterogeneous catalyst...

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Bibliographic Details
Published in:Green chemistry : an international journal and green chemistry resource : GC 2021-10, Vol.23 (19), p.778-7789
Main Authors: Li, Peifeng, Ouyang, Yixuan, Xiao, Gang, Zhao, Yilin, Sarina, Sarina, Baeyens, Jan, Su, Haijia, Zhu, Huai-Yong
Format: Article
Language:English
Subjects:
Aromatic compounds
Catalysis
Catalysts
Conversion
Depolymerization
Energy consumption
Ethers
Green chemistry
Guaiacol
Hydrogenolysis
Irradiation
Light irradiation
Lignin
Metals
Nanoparticles
Selectivity
Vanillin
Zirconium dioxide
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Summary:Light-driven catalysis on catalytically versatile group VIII metals, which has been widely used in thermal catalysis, holds great potential in solar-to-chemical conversion. We report a novel photocatalysis process for the selective hydrogenolysis of aryl ethers in lignin on a heterogeneous catalyst of non-precious Ni nanoparticles supported on ZrO 2 . Three aryl ether bonds in lignin were successfully cleaved under mild conditions with excellent conversion and good to excellent selectivity under visible light irradiation. We also used solar irradiation to demonstrate a significant reduction in the total energy consumption. The light irradiation excited interband transitions in Ni nanoparticles and the resultant energetic electrons enhanced the activity of reductive cleavage of the aryl ethers. Its application potential was illustrated by the depolymerization of dealkaline lignin to give a total monomer yield of 9.84 wt% with vanillin, guaiacol, and apocynin as the three major products. A visible-light-driven procedure using non-plasmonic and non-precious Ni nanoparticles was developed for the selective hydrogenolysis of lignin aryl ether bonds under mild conditions.
ISSN:1463-9262
1463-9270
DOI:10.1039/d1gc01953h