文献类型：期刊文献

英文题名：Fine regulation of Ru species improved the polyethylene hydrogenolysis performance over Ru/Al2O3 catalyst

作者：Dai, Jing[1];Fang, Ziqi[1];Yang, Huayue[1];Li, Zhengjian[1];Wang, Mingzhi[1];Tian, Shuying[1];Liu, Shumin[1];Jia, Yanyan[2];Chen, Mingshu[3];Zhao, Yun[1];Chen, Guangxu[1]

机构：[1]South China Univ Technol, Sch Environm & Energy, Natl Engn Lab VOCs Pollut Control Technol & Equipm, Guangdong Prov Key Lab Atmospher Environm & Pollut, Guangzhou 510006, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200030, Peoples R China;[3]Xiamen Univ, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

年份：2026

卷号：19

期号：5

外文期刊名：NANO RESEARCH

收录：;EI(收录号：20261820641935);WOS:【SCI-EXPANDED(收录号:WOS:001733080300023)】；

基金：Acknowledgements This work was supported by the National Key Research and Development Program of China (Nos. 2024YFC3908700 and 2021YFA1501900) , the Natural Science Foundation of Guangdong Province (No. 2025A1515010458) , the National Natural Science Foundation of China (Nos. 22471077 and 22106048) , Guangdong Innovative and Entrepreneurial Research Team Program (No. 2019ZT08L075) , Guangdong Pearl River Talent Program (No. 2019QN01L159) , and Guangdong Provincial Key R&D Program (No. 2020B010188002) for financial support.

语种：英文

外文关键词：hydrogenolysis; interfacial catalysis; metal-support interaction; plastic recycling; polyethylene degradation

摘要：Thermocatalytic technologies are the most promising approach for converting plastic waste into valuable chemicals. The Rubased catalysts are the most active catalysts reported, which are highly efficient for C-C bond breaking during thermocatalytic plastic degradation. Still, significant challenges remain in controlling the selectivity of the valuable liquid product. A trade-off relationship between the activity and selectivity is commonly found during thermocatalytic plastic degradation. Herein, we demonstrated that a Ru/gamma-Al2O3-Ar catalyst, prepared from commercial gamma-Al2O3 pre-calcined under an Ar atmosphere, achieved 100% conversion over low-density polyethylene (LDPE) hydrogenolysis and an 85.9% selectivity for fuel-range and wax hydrocarbons at 250 degrees C for 4 h. In contrast, Ru loaded on the synthesized gamma-Al2O3 showed only a 17.9% selectivity toward fuel range and wax hydrocarbons, with methane being the predominant product. Comprehensive characterizations revealed a strong metal-support interaction (MSI) at the interface between Ru and gamma-Al2O3-Ar, leading to the abundance of Run+species at the Ru-Al2O3 interface. Combined experimental and density functional theory (DFT) computational studies reveal that the incorporation of Run+effectively suppresses excessive dehydrogenation into methane intermediates. Simultaneously, it promotes the hydrogenation of hydrocarbon intermediates through a synergistic hydrogen spillover effect, driven by high H* coverage, which ultimately boosts catalytic efficiency.