Multi-scale Designed CoxMn3–xO4 Spinels: Smart Pre-Catalysts towards High-Efficiency Pyrolysis-Catalysis Recycling of Waste Plastics

Xingmin Liu, Dan Xu* (Corresponding Author), Hui Ding, Marc Widenmeyer, Wenjie Xie, Maximilian Mellin, Fangmu Qu, Guoxing Chen, Ye Shui Zhang, Zhenyu Zhang, Aasir Rashid, Leopoldo Molina-Luna, Jan P. Hofmann, Ralf Riedel, Dan J.L. Brett, Anke Weidenkaff* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this work, multiscale designed 3-dimensional (3D) rose-like CoxMn3–xO4 spinel smart pre-catalysts that can self-convert into the targeted active site-rich Co/MnO catalysts were developed for the high-efficiency conversion of waste plastics. At a pre-catalyst to plastic weight ratio of 1:14, the carbon nanotube composites (CNCs) and H2 yield can reach 41 wt% and 36 mmol⋅g− 1pla., while the specific CNCs and H2 yield can be as high as 7.48 g− 1cat. and 634 mmol⋅g− 1pla.⋅g− 1cat. The latter is more than one order of magnitude higher than reported in the literature. Density functional theory calculations indicate that the Co/MnO catalyst exhibits excellent activity in the dissociation of alkanes (e.g., CH4). The resulting CNCs demonstrated excellent discharge capability and extended cycling performance when used as a lithium-ion battery anode. This work revealed an innovative recipe and novel insight for developing advanced catalyst materials as the next generation catalysts for the conversion of waste plastics. 
Original languageEnglish
Article number122271
Number of pages13
JournalApplied Catalysis B: Environmental
Volume324
Early online date21 Dec 2022
DOIs
Publication statusPublished - 5 May 2023

Bibliographical note

Acknowledgements
M. W. and A. W. highly acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) within the NexPlas project (project number: 03SF0618B). Y. S. Z is grateful for financial supports provided by the Royal Society of Chemistry Enablement Grant (E21-5819318767) and Royal Society of Chemistry Mobility Grant (M19-2899).

Keywords

  • Waste plastics
  • CoxMn3–xO4 spinels
  • Carbon nanotube composites
  • H2 production
  • Pyrolysis-catalysis

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