Highly dispersed Pd nanoparticles in situ reduced and stabilized by nitrogen-alkali lignin-doped phenolic nanospheres and their application in vanillin hydrodeoxygenation
Xue Gu , Yu Qin , Jiahui Wei , Bing Yuan , Fengli Yu , Liantao Xin , Congxia Xie , Shitao Yu
Front. Chem. Sci. Eng. ›› 2024, Vol. 18 ›› Issue (11) : 127
Highly dispersed Pd nanoparticles in situ reduced and stabilized by nitrogen-alkali lignin-doped phenolic nanospheres and their application in vanillin hydrodeoxygenation
Herein, we introduced a nitrogen-alkali lignin-doped phenolic resin (N@ALnPR) to produce palladium nanoparticles through an in situ reduction of palladium in an aqueous phase, without the need for additional reagents or a reducing atmosphere. The phenolic resin nanospheres and the resulting palladium nanoparticles were extensively characterized. Alkali lignin created a highly conducive environment for nitrogen incorporation, dispersion, reduction, and stabilization of palladium, leading to a distinct catalytic performance of palladium nanoparticles in vanillin hydrodeoxygenation. Under specific conditions of 1 mmol of vanillin, 40 mg of catalyst, 1 MPa H2, 90 °C, and 3 h, the optimized Pd/N@AL30PR catalyst exhibited a nearly complete conversion of vanillin, 98.9% selectivity toward p-creosol, and good stability for multiple reuses. Consequently, an environmentally friendly lignin-based catalyst was developed and used for the efficient hydrodeoxygenation conversion of lignin-based platform compounds.
alkali lignin / phenolic nanosphere / palladium nanoparticles / hydrodeoxygenation / vanillin
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Higher Education Press
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