Boosting the Catalytic Performance of Ru Nanoparticles on the Cleavage of β-O-4 Linkage in Lignin by Doping Mo
作者:Puyi Lei、Jiali Zhang、Wenzhuo Shen、Min Zhong、Shouwu Guo
DOI:10.1039/d4gc00294f
日期:——
reduced graphene oxide (RuMo/rGO) are prepared through synchronous reduction of RuCl3, MoCl5, and graphene oxide. The compositions, morphologies, and structures of the as-prepared RuMo/rGO composites are fully characterized. Their catalytic properties in oxidative cleavage of β-O-4 linkages in lignin model compounds and lignin are explored. It is illustrated that with O2 as the oxidant RuMo/rGO shows overall
本工作通过RuCl 3、MoCl 5和氧化石墨烯的同步还原制备了在还原氧化石墨烯上掺杂Mo的Ru纳米颗粒(RuMo/rGO)。所制备的 RuMo/rGO 复合材料的组成、形貌和结构得到了充分表征。探讨了它们在木质素模型化合物和木质素中 β-O-4 键氧化裂解中的催化特性。结果表明,以O 2作为氧化剂,RuMo/rGO 在 β-O-4 键的氧化裂解中表现出比我们之前报道的催化剂(例如 Ru/rGO 和 RuCo/rGO)更好的催化性能。通过实验和密度泛函理论(DFT)计算阐述了催化机理。明显地,我们表明,掺杂的Mo可以有效促进分子氧的活化过程以及rGO上Ru纳米粒子表面上β-O-4模型化合物的吸附,从而增强催化活性。同时证明RuMo/rGO可以在相对温和的条件(100℃、0.3MPa O 2、12h、pH=12)下催化有机溶剂桦木木质素解聚,产生17.1%的芳香族化合物。