A Metal-Free, Carbon-Based Catalytic System for the Oxidation of Lignin   Model Compounds and Lignin

doi:10.1002/cplu.201300439

CORC > 北京大学 > 化学与分子工程学院

	A Metal-Free, Carbon-Based Catalytic System for the Oxidation of Lignin Model Compounds and Lignin
	Gao, Yongjun ; Zhang, Jiaguang ; Chen, Xi ; Ma, Ding ; Yan, Ning
刊名	chempluschem
	2014
关键词	aromatic chemicals graphene heterogeneous catalysis lignin oxidation SELECTIVE DEGRADATION ORGANOSOLV LIGNIN AEROBIC OXIDATION 2-STEP PROCESS DEPOLYMERIZATION CHEMISTRY HYDROGENOLYSIS CONVERSION CHEMICALS CLEAVAGE
DOI	10.1002/cplu.201300439
英文摘要	Nitrogen-containing graphene material (LCN) has been identified as an effective catalyst for the oxidation of beta-O-4 and alpha-O-4 types of lignin model compounds in the presence of tertbutyl hydroperoxide, to provide aromatic aldehydes, acids and other organic chemicals in high yield. The transformations of five lignin model compounds over LCN were investigated systematically. Instrumentation analysis, kinetic study and radical trapping experiments highlight the mechanistic features of the reaction, including: 1) the reaction pathway starts by benzylic C-H or C-OH bond activation, followed by C-alpha-C-beta or C-alpha-O bond cleavage, and finally further oxidation of intermediate aromatics; and 2) the reaction follows a free-radical mechanism with all the key steps involving radical species. In addition, the LCN proved to be a highly stable catalyst; no significant activity decrease was observed for four consecutive runs, and X-ray photoelectron spectroscopy analysis indicates negligible decrease in the content of the active nitrogen species in the catalyst. Notably, this new catalytic system can be extended to the oxidative depolymerisation of real lignin, to produce a significant portion of liquefied, low-molecular-mass products.; Chemistry, Multidisciplinary; SCI(E); 10; ARTICLE; ning.yan@nus.edu.sg; 6; 825-834; 79
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/389242]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Gao, Yongjun,Zhang, Jiaguang,Chen, Xi,et al. A Metal-Free, Carbon-Based Catalytic System for the Oxidation of Lignin Model Compounds and Lignin[J]. chempluschem,2014.
APA	Gao, Yongjun,Zhang, Jiaguang,Chen, Xi,Ma, Ding,&Yan, Ning.(2014).A Metal-Free, Carbon-Based Catalytic System for the Oxidation of Lignin Model Compounds and Lignin.chempluschem.
MLA	Gao, Yongjun,et al."A Metal-Free, Carbon-Based Catalytic System for the Oxidation of Lignin Model Compounds and Lignin".chempluschem (2014).