Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 10, Issue 22, Pages 7321-7329Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c01080
Keywords
bifunctional catalysis; biomass upgrading; Co@Co-NC; hydrogenation catalysis H-2 promoted acid catalysis
Categories
Funding
- National Natural Science Foundation of China [22178158, 52162014, 22065024, 21878138]
- Cultivating Project for Academic and Technical Leader of Key Discipline of Jiangxi Province [20212BCJ23038]
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Bifunctional hydrogenation and acid catalysis in aqueous solvents is a common method for tandem reactions of biomass derivates. This study used Co@Co-NCs as catalysts to convert furfurals into cyclopentanols. The study also found that H-2 can not only serve as a reductant but also promote the acid-catalyzed steps through a water-mediated mechanism.
Bifunctional hydrogenation and acid catalysis in aqueous solvents over reduced metal-supported solid acids is a common method for tandem reactions of biomass derivates. Traditionally, hydrogen (H-2) was used as the reductant for the hydrogenation steps and rarely reported as a promoter in the acid-catalyzed steps. Herein, Co-embedded N-doped carbon (Co@Co-NCs) is used for the bifunctional catalytic conversion of furfurals into cyclopentanols. In addition to being a reductant for the hydrogenation step over the Co nanoparticle core, H-2 can act as a catalyst to induce the acid-base transformation of the Co-NC shell from Lewis acid-base pairs into Bronsted acid-base pairs via heterolysis and a subsequent water-mediated mechanism, which largely promotes the acid- catalyzed step. Compared with Co/C, Co@Co-NCs show a better bifunctional catalytic performance with cyclopentanol yields above 90%. This study redefines the role of H-2, which has important implications for many reduction reactions with water as a solvent.
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