Efficient transformation of plastic wastes to H2 and electromagnetic nanocarbon absorbents over molecular-level engineered 3D NiCo/MnO

Dan Xu; Chen Shen; Xingmin Liu; Wenjie Xie; Hui Ding; Marc Widenmeyer; Maximilian Mellin; Fangmu Qu; Aasir Rashid; Guoxing Chen; Emanuel Ionescu; Ye Shui Zhang; Leopoldo Molina-Luna; Jan P. Hofmann; Dan J.L. Brett; Hongbin Zhang; Anke Weidenkaff

doi:10.1016/j.cej.2023.146477

Efficient transformation of plastic wastes to H₂ and electromagnetic nanocarbon absorbents over molecular-level engineered 3D NiCo/MnO

Dan Xu, Chen Shen, Xingmin Liu^*, Wenjie Xie, Hui Ding, Marc Widenmeyer, Maximilian Mellin, Fangmu Qu, Aasir Rashid, Guoxing Chen, Emanuel Ionescu, Ye Shui Zhang, Leopoldo Molina-Luna, Jan P. Hofmann, Dan J.L. Brett, Hongbin Zhang, Anke Weidenkaff

^*Corresponding author for this work

Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The advancement in the pyrolysis-catalysis conversion of waste plastics is currently limited by three problematic issues, namely lack of efficient catalysts, ambiguous catalytic mechanism, and identification of a dedicated application of carbon nanocomposites. Herein, advanced bimetallic NiCo/MnO catalysts were developed via a molecular- and macroscale-level engineering strategy. The best conversion performance among all batches was achieved for a Co:Ni molar ratio of 1:1. When the plastic-to-catalyst ratio is 10.7:1, the H₂ and carbon yields of polyethylene conversion reached 29.8 mmol/g_plas and 42.2 wt%, respectively. Density functional theory simulations rationalized the activity of NiCo/MnO catalysts in the dehydrogenation of hydrocarbons. The resulting carbon nanocomposites demonstrated excellent electromagnetic absorption performance with an effective absorption bandwidth of the representative carbon nanocomposites/wax composite of 5.12 GHz and a minimal reflection loss lower than −45 dB. This work provides novel insights for developing advanced catalysts for the pyrolysis-catalysis conversion of waste plastics.

Original language	English
Article number	146477
Journal	Chemical Engineering Journal
Volume	476
Early online date	14 Oct 2023
DOIs	https://doi.org/10.1016/j.cej.2023.146477
Publication status	Published - 15 Nov 2023

Bibliographical note

Funding Information:
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 the financial support provided by the Royal Society of Chemistry Enablement Grant (E21-5819318767) and the Royal Society of Chemistry Mobility Grant (M19-2899). D. X. really appreciates the National Natural Science Foundation of China (52306281), Zhejiang Provincial Natural Science Foundation of China (LY23E060005) and Special Financial Grant from the China Postdoctoral Science Foundation (2022TQ0270).

Publisher Copyright:
© 2023

Data Availability Statement

No data was used for the research described in the article.

Keywords

Carbon nanotube composites
H production
NiCoMnO spinels
Pyrolysis-catalysis
Waste plastics

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10.1016/j.cej.2023.146477

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Cite this

Xu, D., Shen, C., Liu, X., Xie, W., Ding, H., Widenmeyer, M., Mellin, M., Qu, F., Rashid, A., Chen, G., Ionescu, E., Zhang, Y. S., Molina-Luna, L., Hofmann, J. P., Brett, D. J. L., Zhang, H., & Weidenkaff, A. (2023). Efficient transformation of plastic wastes to H₂ and electromagnetic nanocarbon absorbents over molecular-level engineered 3D NiCo/MnO. Chemical Engineering Journal, 476, Article 146477. https://doi.org/10.1016/j.cej.2023.146477

Xu, D, Shen, C, Liu, X, Xie, W, Ding, H, Widenmeyer, M, Mellin, M, Qu, F, Rashid, A, Chen, G, Ionescu, E, Zhang, YS, Molina-Luna, L, Hofmann, JP, Brett, DJL, Zhang, H & Weidenkaff, A 2023, 'Efficient transformation of plastic wastes to H₂ and electromagnetic nanocarbon absorbents over molecular-level engineered 3D NiCo/MnO', Chemical Engineering Journal, vol. 476, 146477. https://doi.org/10.1016/j.cej.2023.146477

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abstract = "The advancement in the pyrolysis-catalysis conversion of waste plastics is currently limited by three problematic issues, namely lack of efficient catalysts, ambiguous catalytic mechanism, and identification of a dedicated application of carbon nanocomposites. Herein, advanced bimetallic NiCo/MnO catalysts were developed via a molecular- and macroscale-level engineering strategy. The best conversion performance among all batches was achieved for a Co:Ni molar ratio of 1:1. When the plastic-to-catalyst ratio is 10.7:1, the H2 and carbon yields of polyethylene conversion reached 29.8 mmol/gplas and 42.2 wt%, respectively. Density functional theory simulations rationalized the activity of NiCo/MnO catalysts in the dehydrogenation of hydrocarbons. The resulting carbon nanocomposites demonstrated excellent electromagnetic absorption performance with an effective absorption bandwidth of the representative carbon nanocomposites/wax composite of 5.12 GHz and a minimal reflection loss lower than −45 dB. This work provides novel insights for developing advanced catalysts for the pyrolysis-catalysis conversion of waste plastics.",

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AU - Ding, Hui

AU - Widenmeyer, Marc

AU - Mellin, Maximilian

AU - Qu, Fangmu

AU - Rashid, Aasir

AU - Chen, Guoxing

AU - Ionescu, Emanuel

AU - Zhang, Ye Shui

AU - Molina-Luna, Leopoldo

AU - Hofmann, Jan P.

AU - Brett, Dan J.L.

AU - Zhang, Hongbin

AU - Weidenkaff, Anke

N1 - Funding Information: 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 the financial support provided by the Royal Society of Chemistry Enablement Grant (E21-5819318767) and the Royal Society of Chemistry Mobility Grant (M19-2899). D. X. really appreciates the National Natural Science Foundation of China (52306281), Zhejiang Provincial Natural Science Foundation of China (LY23E060005) and Special Financial Grant from the China Postdoctoral Science Foundation (2022TQ0270). Publisher Copyright: © 2023

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N2 - The advancement in the pyrolysis-catalysis conversion of waste plastics is currently limited by three problematic issues, namely lack of efficient catalysts, ambiguous catalytic mechanism, and identification of a dedicated application of carbon nanocomposites. Herein, advanced bimetallic NiCo/MnO catalysts were developed via a molecular- and macroscale-level engineering strategy. The best conversion performance among all batches was achieved for a Co:Ni molar ratio of 1:1. When the plastic-to-catalyst ratio is 10.7:1, the H2 and carbon yields of polyethylene conversion reached 29.8 mmol/gplas and 42.2 wt%, respectively. Density functional theory simulations rationalized the activity of NiCo/MnO catalysts in the dehydrogenation of hydrocarbons. The resulting carbon nanocomposites demonstrated excellent electromagnetic absorption performance with an effective absorption bandwidth of the representative carbon nanocomposites/wax composite of 5.12 GHz and a minimal reflection loss lower than −45 dB. This work provides novel insights for developing advanced catalysts for the pyrolysis-catalysis conversion of waste plastics.

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