Related Experiment Video
Updated: Jun 16, 2026
10:18
Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
Published on: January 7, 2019
Interfacial Electronic Modulation Redirects Anodic Radical Chemistry for Selective C─C Bond Cleavage in
Wenyu Wang1, Yun Wang1, Yi Qi1,2,3
1School of Chemical Engineering and Light Industry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, China.
Angewandte Chemie (International Ed. in English)
|June 13, 2026
Summary
A novel CuO/CuCo2O4 catalyst enables selective electro-oxidation of lignin to renewable aromatics. This approach controls radical chemistry at the anode, improving product yields and preventing overoxidation.
Area of Science:
- Electrochemistry
- Catalysis
- Renewable Energy
Background:
- Lignin depolymerization is key for renewable aromatics, but selectivity issues like overoxidation limit its potential.
- Existing electro-oxidative methods struggle with controlling reactions at the anode.
Purpose of the Study:
- To develop a highly selective electro-catalyst for lignin depolymerization.
- To elucidate the reaction mechanism and identify strategies for improved aromatic product yields.
Main Methods:
- Fabrication of a CuO/Cu0.92Co2.08O4 heterostructured catalyst.
- Electrochemical depolymerization of a model substrate (2-phenoxy-1-phenylethanol) and enzymatic hydrolysis lignin.
- Time-resolved analysis, intermediate-feeding experiments, in situ Raman, FTIR, EPR, and density functional theory (DFT) calculations.
Main Results:
- Achieved 88% conversion of the model substrate, yielding benzaldehyde (53%) and phenol (27%).
- Identified a tandem pathway involving benzylic oxidation and Cα-Cβ scission.
- Demonstrated that the Cu─Co interface suppresses oxygen evolution reaction (OER) species and promotes radical chemistry, weakening lignin interunit linkages while retaining aromatic products.
Conclusions:
- Interfacial control of anodic radical chemistry is a viable strategy for selective lignin bond editing.
- The developed catalyst and mechanistic insights offer a promising route for producing renewable aromatics from lignin.
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