Selective Asymmetric Hydrogenation of Waste Polyethylene Terephthalate via Controlled Sorption through Precisely Tuned Moderate Acid Sites

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

The partial hydrogenation of waste polyethylene terephthalate (PET) offers a great opportunity to produce valuable chemicals, yet achieving precise catalytic control remains challenging. Herein, for the first time, we realized one-pot selective PET p-toluic acid (p-TA) with record-high yield 53.4%, alongside 36.4% p-xylene (PX), using specially designed PtW/MCM-48 catalyst. Mechanistic investigations revealed that exceptional performance arises from synergistic interaction between Pt nanoparticles and WOx species. Low-valent enhances dispersion, while stabilizes as low-polymerized polytungstates. moderate acidity PtW1.5/MCM-48 ensures controlled desorption p-TA, preventing overhydrogenation PX. catalyst demonstrated robust real-world waste. Life cycle assessment technical economic evaluation further highlight its practical feasibility. This study establishes sustainable pathway chemical upcycling provides framework designing advanced catalysts reactions, addressing critical challenges in circular chemistry plastic management.

Language: Английский

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Advancements in the Electrochemical Upcycling of Waste Plastics into High-Value Products

Crystals, Journal Year: 2025, Volume and Issue: 15(4), P. 293 - 293

Published: March 24, 2025

The growing plastic waste crisis calls for innovative and sustainable solutions that go beyond traditional recycling methods. Electrochemical upcycling has emerged as a promising approach converting plastics into valuable chemicals, fuels, functional materials. Recent advancements in electrochemical strategies valorization focus on key catalysts, reaction mechanisms, process efficiencies. studies place special emphasis new techniques aimed at improving selectivity, energy efficiency, scalability. Additionally, integrating renewable sources optimizing electrode materials have significantly enhanced sustainability. This review specifically focuses recent research, which addresses the challenges of waste.

Language: Английский

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Co-recycling of plastics and other waste materials

Published: April 28, 2025

Language: Английский

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Upcycling of Waste Plastics into Value-Added Chemicals

Science for energy and environment., Journal Year: 2025, Volume and Issue: unknown, P. 4 - 4

Published: March 27, 2025

Review Upcycling of Waste Plastics into Value-Added Chemicals Jin Xu and Jing Zhang * State Key Laboratory Chemical Engineering, East China University Science Technology, 130 Meilong Road, Shanghai 200237, Correspondence: [email protected] Received: 8 November 2024; Revised: 22 January 2025; Accepted: 24 March Published: 27 2025 Abstract: The rapid increase in plastic production has led to a severe waste crisis, driving the development various recycling technologies mitigate this growing issue. However, these often encounter substantial economic environmental challenges their implementation. An increasingly attractive alternative is chemical upcycling, which can transform plastics value-added chemicals. This review systematically examines upcycling applicable major commercial plastics, including polyethylene terephthalate (PET), polyolefins, polystyrene (PS), polyvinyl chloride (PVC). We focus on key strategies such as solvolysis, catalytic pyrolysis, hydrocracking hydrogenolysis, along with some emerging approaches electrocatalysis photooxidation, aiming summarize trends plastics.

Language: Английский

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Recent advances in electrochemical cathodic nitrogen oxide reduction coupled with thermodynamically favorable anodic oxidation

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110939 - 110939

Published: April 1, 2025

Language: Английский

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