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Chemical Engineering Science

Chemical Engineering Science

IF: 4.09
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High-gravity-assisted synthesis of NiCo2O4/C for electro-upcycling polyethylene terephthalate to commodity chemicals

Published:12 December 2024 DOI: 10.1016/j.ces.2024.121084
Ling-Xia Yun, Xin-Ran Shi, Tian-Bao Chen, Yu-Hang Gu, Meng Qiao, Hang-Tian Zhang, Jie-Xin Wang

Abstract

Regarding the environmental and ecological hazards of waste plastics, the unexploited polyester resources promise to produce valuable chemicals and fuels by electrocatalytic upcycling in combination with alkaline hydrolysis. Herein, we propose a universal approach to synthesize carbon supported NiCo2O4 nanoparticles (NPs) utilizing high gravity technology combined with heat treatment for electrocatalytic valorization of polyethylene terephthalate (PET). This route enables instantaneous and continuous precipitation of the composites including Co-NH3 complex and Ni hydroxide on carbon in a rotating packed bed (RPB) reactor, and achieves ultrasmall and ligand-free NiCo2O4 NPs (6?nm) with significantly improved dispersity after heat treatment. The as-prepared NiCo2O4 NPs/C converts PET-derived EG to formate with a promising faradaic efficiency (FE) of over 90?% and a high productivity of about 4.5?mmol·cm?2·h?1 at 1.5?V (vs RHE). Furthermore, this strategy can also be extended to the preparation of other supported ternary oxide NPs for efficient electro-oxidation of PET hydrolysate.

Substances (2)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Dimethyl sulfoxide 67-68-5 C2H6OS 1344 suppliers $15.00-$120900.00
ETHYLENE-D4 GLYCOL 2219-51-4 C2H2D4O2 67 suppliers $55.00-$1121.80

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