文献类型：期刊文献

英文题名：Comparative Studies in the Hydrogenolysis Cleavage of C-O and C-C Bonds in Aromatic Plastics over a Metal-free Nb2O5 Catalyst

作者：Zhou, Hao[1,2];Lu, Shenglu[2];Liu, Xiaohui[2];Wang, Yanqin[2]

机构：[1]Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou 310023, Zhejiang, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China

年份：2025

卷号：13

期号：48

起止页码：20931

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20255119713560);WOS:【SCI-EXPANDED(收录号:WOS:001619551100001)】；

基金：Financial support for this work was provided by the National Key Research and Development Program of China (Grant 2022YFA1504903) and the National Natural Science Foundation of China (Grant 22172048).

语种：英文

外文关键词：catalytic hydrogenolysis; aromatic polymers; metal-free catalyst; hydrogen dissociation; C-Obond scission

摘要：Upcycling and recycling waste plastics into valuable chemical products and fuels have emerged as a potentially viable strategy to address the depletion of fossil energy resources and escalating energy demand. C-O and C-C bonds are fundamental linkages in aromatic plastics, and the precise activation and cleavage of C-O and C-C bonds are highly desired. Herein, we study the hydrogenolysis cleavage of C-O and C-C bonds in aromatic plastics by using a metal-free Nb2O5 catalyst. Hydrogenolysis cleavage of the Csp2-Csp3 bond in oxygen-free plastics like polystyrene (PS) is feasible, while hydrogenolysis cleavage of the C-O bond in polyethylene terephthalate (PET) and poly(phenylene oxide) (PPO) is not. Electron paramagnetic resonance (EPR), X-ray absorption near-edge structure (XANES), temperature-programmed desorption (TPD), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveal that the excessive adsorption of the C-O bond on the Nb2O5 catalyst surface leads to the coverage of active sites for hydrogen dissociation, thereby preventing the hydrogenolysis cleavage of C-O bonds. Furthermore, future directions for the hydrogenolysis cleavage of the C-O bond on metal-free Nb2O5 catalysts are provided. This study facilitates the development of economical and high-performance metal-free catalysts.