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Controlling the selectivity of the hydrogenolysis of polyamides catalysed by ceria-supported metal nanoparticles

Author

Listed:
  • XinBang Wu

    (Swiss Federal Institute of Technology Lausanne (EPFL))

  • Wei-Tse Lee

    (Swiss Federal Institute of Technology Lausanne (EPFL))

  • Roland C. Turnell-Ritson

    (Swiss Federal Institute of Technology Lausanne (EPFL))

  • Pauline C. L. Delannoi

    (Swiss Federal Institute of Technology Lausanne (EPFL))

  • Kun-Han Lin

    (National Tsing Hua University (NTHU))

  • Paul J. Dyson

    (Swiss Federal Institute of Technology Lausanne (EPFL))

Abstract

Catalytic hydrogenolysis is a promising approach to transform waste plastic into valuable chemicals. However, the transformation of N-containing polymers, such as polyamides (i.e. nylon), remains under-investigated, particularly by heterogeneous catalysis. Here, we demonstrate the hydrogenolysis of various polyamides catalysed by platinum-group metal nanoparticles supported on CeO2. Ru/CeO2 and Pt/CeO2 are both highly active but display different selectivity; Ru/CeO2 is selective for the conversion of all polyamides into water, ammonia, and methane, whereas Pt/CeO2 yields hydrocarbons retaining the carbon backbone of the parent polyamide. Density functional theory computations illustrate that Pt nanoparticles require higher activation energy for carbon−carbon bond cleavage than Ru nanoparticles, rationalising the observed selectivity. The high activity and product selectivity of both catalysts was maintained when converting real-world polyamide products, such as fishing net. This study provides a mechanistic basis for heterogeneously catalysed polyamide hydrogenolysis, and a new approach to the valorisation of polyamide containing waste.

Suggested Citation

  • XinBang Wu & Wei-Tse Lee & Roland C. Turnell-Ritson & Pauline C. L. Delannoi & Kun-Han Lin & Paul J. Dyson, 2023. "Controlling the selectivity of the hydrogenolysis of polyamides catalysed by ceria-supported metal nanoparticles," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42246-x
    DOI: 10.1038/s41467-023-42246-x
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    References listed on IDEAS

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    1. Jose R. Cabrero-Antonino & Rosa Adam & Veronica Papa & Matthias Beller, 2020. "Homogeneous and heterogeneous catalytic reduction of amides and related compounds using molecular hydrogen," Nature Communications, Nature, vol. 11(1), pages 1-18, December.
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