▎ 摘　　要

In this work, we report oxidative cleavage of C-C bonds in beta-O-4 lignin models that is catalyzed by gold nanoparticles stabilized by graphene quantum dots (AuNPs-GQDs). We demonstrate that GQDs can enhance the catalytic activity of AuNPs. The AuNPs-GQDs shows the highest catalytic activity when the mass ratio of AuNPs to GQDs is of 1:18. Moreover, AuNPs-GQDs exhibits higher activity in the cleavage of C-alpha-C-beta bond of the compounds when their C-beta is adjacent to an oxygen atom. The possible oxidation pathway is proposed.