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Highly efficient hydrogenation of levulinic acid into γ-valerolactone over modified bifunctional yolk-shell catalyst
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DOI：10.1016/j.jcis.2025.138701.png)
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Abstract
En 中文
The high efficiency production of renewable resources has been widely used in fuel and synthetic chemistry. In this work, a series of novel, efficient Pd@mSiO2-xCeO2 bifunctional yolk-shell catalysts have been developed and applied to the preparation of γ-valerolactone by the hydrogenation of levulinic acid. The results showed that CeO2 can effectively improve the catalytic performance of the catalyst, then achieve 100 % conversion of levulinic acid and 97 % selectivity of γ-valerolactone. The characterization results showed that the addition of CeO2 regulated the acid sites of the catalyst, promoted the reduction of PdO, thus promoting the formation of more Pd0. In addition, the kinetic experiment results showed that the activation energy of the reaction effectively decreased with the addition of CeO2. Then, the reaction mechanism was studied using Density functional theory (DFT) calculations. Finally, the encapsulation strategy of mesoporous silica shell provided a stable environment for the catalyst and maintains high activity after 5 cycles. The efficient and stable noble metal catalysts developed in this study significantly enhance the yield of biomass-derived γ-valerolactone. Their large-scale application not only supports the green production of biofuels and biodegradable materials but also establishes a material foundation for the generation of renewable energy, thereby contributing to the realization of a low-carbon circular economy.
Keywords:
Pd@mSiO2-xCeO2
yolk-shell catalyst
γ-valerolactone
levulinic acid hydrogenation
renewable resources
Journal
IF:
9.7
Papers:
3.7W
Citations:
14.7W
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