Modulating the electronic structure of Ni-Co alloy catalysts enhances corn stalk lignin hydrodeoxygenation into phenolic monomers

Xiaomeng Yang, Zhen Zhang, Xiangang Li, Jianshe Wang, Dan Wu, Yongsheng Zhang and Chunbao Charles Xu

Energy, 2025, vol. 334, issue C

Abstract: The production of phenolic monomers from agricultural waste biomass is environmentally friendly, economical, and sustainable. Here, we synthesized floral-like Ni-Co alloy catalysts via hydrothermal method for hydrodeoxygenation (HDO) of corn stalk lignin (CSL) to phenolic monomers. The optimized Ni1Co2Al-LDO-500 catalyst exhibits excellent catalytic performance for HDO of CSL, with lignin oil and phenolic monomer yields as high as 63.37 wt% and 46.63 wt% at 240 °C, respectively. XRD and TEM characterization confirms the formation of Ni-Co alloys, and XPS analysis reveals that the electron transfer between Ni and Co in the catalysts enhances the efficient activation of H2 and the hydrogenation breaking of C-O bonds. Moreover, the possible reaction pathways and reaction mechanisms of β-O-4 bonds hydrogen cleavage reaction over NiCoAl-LDO catalysts were elucidated by combining model reaction and 2D HSQC NMR analyses. Understanding the synergistic effect of Ni-Co alloy and acid site in NiCoAl-LDO catalysts in the HDO of CSL facilitates the efficient depolymerization of lignin for the production of phenolic products.

Keywords: Corn stalk lignin; Hydrodeoxygenation; Ni-Co alloy catalysts; Electronic structure (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:334:y:2025:i:c:s0360544225035170

DOI: 10.1016/j.energy.2025.137875

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