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.
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).
- Waste plastics
- CoxMn3–xO4 spinels
- Carbon nanotube composites
- H2 production