文献类型： 外文期刊

作者： Qiu, Shukun ¹ ; Wu, Zhiping ¹ ; Liu, Xudong ² ; Liu, Pengyun ² ; Jiang, Zhicheng ³ ; Xie, Mingyu ⁴ ; Chao, Yan ² ; Liu, Rukuan ² ; Li, Changzhu ² ; Xiao, Zhihong ² ; Zhao, Zicheng ⁵ ;

作者机构： 1.Cent South Univ Forestry & Technol, Coll Mat & Energy, Changsha 410004, Peoples R China

2.Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China

3.Sichuan Univ, Coll Biomass Sci & Engn, Chengdu 610065, Peoples R China

4.Hunan Acad Agr Sci, Soil & Fertilizer Inst, Changsha 410125, Peoples R China

5.Hunan Automot Engn Vocat Univ, Zhuzhou 412001, Peoples R China

关键词： lignin valorization; reductivecatalytic depolymerization; MgAl2O4 spinel; H-2-free; phenolic monomers

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Reductive catalytic depolymerization of lignin to obtain value-added phenolic monomers has great potential. However, achieving the efficient depolymerization of lignin under hydrogen-free conditions while selectively obtaining specific monomers remains a significant challenge. In this study, MgAl2O4-based catalysts with well-developed pore structures and abundant oxygen vacancies were fabricated, exhibiting excellent catalytic performance in the depolymerization of various kinds of biomass. Importantly, a 39.0 wt % yield of phenolic monomers under hydrogen-free conditions over 5 wt % Pd/MgAl2O4 was comparable to that obtained under a H-2 atmosphere from poplar. Furthermore, a high selectivity of 91.3% toward propanol-substituted monomers was obtained from pine. The efficient catalytic hydrogenolysis ability of the catalyst could be attributed to the highly dispersed small-sized metal nanoparticles, strong interaction between noble metal and MgAl2O4 support, and abundant medium-to-strong acidic sites. This study provides a green and efficient catalytic strategy for the valorization of lignin, contributing to the fabrication of phenolic monomers with high selectivity.