Effective Methane Suppression in Upcycling of Polyethylene into Fuels via Alloying Platinum with Ruthenium Supported on ZSM-5 Zeolite

• DOI: 10.1021/acs.nanolett.4c06374
• Publication Date: 2025-02-14T04:28:36Z
• Authors: Li Gao; Ziru Wang; Yumeng Zhang; Xia Zhong; Ying Zhang; Mozaffar Shakeri; Zhuangzhi Zhi; Xia Zhang; Bingsen Zhang

Ruthenium (Ru)-based catalysts are active in catalyzing polyethylene (PE) upcycling, but their tendency for methanation devalues the process. Although previous works confirmed that regulation of Ru structure can inhibit methane yields, mechanism is still unclear, and catalytic performance remains higher upside potential. Herein, we synthesized M-Ru/H-ZSM-5 (M = Pt, Pd, Rh) PE upcycling. Pt-Ru/H-ZSM-5 had better conversion (84.36%) liquid fuel selectivity (78.38%) extremely low (8.43%), which be ascribed to its more electron-deficient Ruδ+ species synergistic effect induced by Pt doping. Through density functional theory calculations, nature inhibition was uncovered reaction pathway proposed. Furthermore, catalyst demonstrated stability reusability, as well efficacy upcycling various PEs. This work reveals Ru-based reactions, promoting plastic recycling development.