Atomic-scale catalyst turns tough plant lignin into valuable chemicals
Researchers have devised a single-atom catalyst that efficiently breaks down lignin from agricultural and forestry waste into useful aromatic compounds under mild conditions.
Scientists at the University of Manchester have engineered a ruthenium single-atom catalyst that embeds isolated Ru atoms in a nitrogen-doped carbon framework, delivering high activity with minimal metal usage. Detailed experiments and computational modeling revealed that Ru-N4 sites generate reactive oxygen species that attack lignin’s robust bonds, splitting the polymer into smaller aromatic molecules. When applied to both model compounds and actual lignin extracted from various biomass sources, the catalyst achieved almost total conversion and produced high yields of phenol and related chemicals.
The process operates under relatively gentle temperatures and does not require aggressive chemicals, suggesting a scalable route for turning plant waste into renewable feedstocks for fuels, plastics, and other materials. The findings, published in ACS Catalysis, provide a molecular blueprint for designing next-generation catalysts for biomass valorisation. Lead author Christopher Parlett highlighted that understanding the atomic-level mechanisms will help accelerate the shift toward a circular, bio-based chemical industry.
Why it matters
The breakthrough could turn abundant plant waste into renewable chemicals, reducing reliance on petroleum.
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