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Download fileIn Situ Preparation of Ru@N-Doped Carbon Catalyst for the Hydrogenolysis of Lignin To Produce Aromatic Monomers
journal contribution
posted on 2019-05-22, 00:00 authored by Tianjin Li, Hongfei Lin, Xinping Ouyang, Xueqing Qiu, Zechen WanA high-performance
catalyst is the key to selectively convert lignin
into aromatic monomers. In this study, Ru@N-doped carbon catalysts
were prepared in situ by a two-stage pyrolysis of a mixture of d-glucosamine hydrochloride (GAH) and ruthenium trichloride
with melamine acting as a soft template. The layered graphitic carbon
nitride (g-C3N4) and the well-wrinkled, mesoporous
graphitic carbon with doped nitrogen atoms were formed after the pyrolysis
at 600 and 800 °C, respectively. For the latter catalyst, the
incorporation of either pyridinic or pyrrolic N atoms on the graphitic
carbon support could not only homogeneously disperse and stabilize
the Ru nanoparticles (NPs) but also create the defect-rich carbon
structure. Compared with commercial Pd/C and Ru/C catalysts, the Ru@N-doped
carbon catalyst contributed to higher catalytic activity for lignin
depolymerization. The yield of the aromatic monomers reached ∼30.5%
over the optimal catalyst at 300 °C.
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Keywords
Aromatic MonomersSitu Preparationruthenium trichloridelatter catalystgraphitic carbon nitridemesoporous graphitic carbonGAHNPpyrrolic N atomstwo-stage pyrolysisg-C 3 N 4defect-rich carbon structured-glucosamine hydrochloridegraphitic carbon supportlignin depolymerizationRu nanoparticlesnitrogen atoms