Advanced Catalysts for the Chemical Recycling of Plastic Waste

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Plastic products bring convenience to various aspects of the daily lives due their lightweight, durability and versatility, but massive accumulation post‐consumer plastic waste is posing significant environmental challenges. Catalytic methods can effectively convert into value‐added feedstocks, with catalysts playing an important role in regulating yield selectivity products. This review explores latest advancements advanced applied thermal catalysis, microwave‐assisted photocatalysis, electrocatalysis, enzymatic catalysis reaction systems for chemical recycling valuable feedstocks. Specifically, pathways mechanisms involved plastics process are analyzed presented, strengths weaknesses employed across different described. In addition, structure‐function relationship these discussed. Herein, it provided insights design novel outline challenges future opportunities terms developing tackle “white pollution” crisis.

Language: Английский

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Selective Liquid Chemical Production in Waste Polyolefin Photorefinery by Controlling Reactive Species

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

Published: Jan. 29, 2025

Photocatalytic upcycling of waste polyolefins into value-added chemicals provides promise in plastic management and resource utilization. Previous works demonstrate that can be converted carboxylic acids, with CO2 as the final oxidation product. It is still challenging to explore more transformation products, particularly mild-oxidation products such alcohols, because their instability compared polymer substrates, which are prone during catalytic reactions. In this work, we propose an efficient strategy regulate product type through precise control radicals, intermediates, reaction paths. Taking commonly used photocatalyst C3N4 example, its major acids CO2. When MoS2 introduced construct a Z-scheme heterostructure, gas significantly reduced alcohols appear high yield 1358.8 μmol gcat-1 selectivity up 80.3%. This primarily attributed presence •OH radicals from oxygen reduction, acting key role alcohol formation while simultaneously suppressing competing pathways •O2- 1O2, thus reducing overoxidation products. The β-scission C-C bonds chains generates intermediate alkyl species, followed by combination produce methanol, energetically favorable for MoS2/C3N4. contrast, species couple form formic acid, C3N4. work new approaches controlling types offers insights involved polyolefin photorefinery.

Language: Английский

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Ultrathin two-dimensional photocatalysts for carbon dioxide reduction into fuels and chemicals

Materials Today Energy, Journal Year: 2023, Volume and Issue: 40, P. 101482 - 101482

Published: Dec. 16, 2023

Language: Английский

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Chemical recycling of waste plastics: Current challenges and perspectives

Fundamental Research, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 1, 2024

Waste plastics offer valuable feedstock for refining facilities. Their well-structured molecular compositions and functional groups make them ideal candidates conversion into high-value chemicals fuels, playing a pivotal role in carbon recycling. Achieving this transformation demands not only the precise design of deconstruction reaction systems but also overcoming technological barriers, necessitating collaborative partnership between fundamental research industrial expertise. In context, we present roadmap advancing recycling upcycling plastic waste, commencing thorough assessment challenges across entire chain.

Language: Английский

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Advances in solar-driven, electro/photoelectrochemical, and microwave-assisted upcycling of waste polyesters

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(21), P. 2828 - 2838

Published: Jan. 1, 2024

This Feature Article systematically elaborates on various emerging technologies for the upcycling of polyesters, while also anticipating future development directions.

Language: Английский

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Unraveling the Impact of Oxygen Vacancy on Electrochemical Valorization of Polyester Over Spinel Oxides

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

Abstract Electrochemical upcycling of end‐of‐life polyethylene terephthalate (PET) using renewable electricity offers a route to generate valuable chemicals while processing plastic wastes. However, it remains huge challenge design an electrocatalyst with reliable structure‐property relationships for PET valorization. Herein, spinel Co 3 O 4 rich oxygen vacancies improved activity toward formic acid (FA) production from hydrolysate is reported. Experimental investigations combined theoretical calculations reveal that incorporation V into not only promotes the generation reactive hydroxyl species (OH * ) at adjacent tetrahedral 2+ (Co2+ Td), but also induces electronic structure transition octahedral 3+ (Co3+ Oh) Oh), which typically functions as highly‐active catalytic sites ethylene glycol (EG) chemisorption. Moreover, enlarged Co‐O covalency induced by facilitates electron transfer EG OH via Co2+ Oh‐O‐Co2+ Td interaction and following C─C bond cleavage direct oxidation glyoxal intermediate pathway. As result, ‐Co catalyst exhibits high half‐cell oxidation, Faradaic efficiency (91%) productivity (1.02 mmol cm −2 h −1 FA. Lastly, demonstrated hundred gram‐scale formate crystals can be produced real‐world bottles two‐electrode electroreforming, yield 82%.

Language: Английский

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Tandem pyrolysis catalytic reforming of plastic waste to high-yield monocyclic aromatics by one-step microwave catalysis

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 312, P. 118571 - 118571

Published: May 22, 2024

Language: Английский

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Impact of high-pressure torsion on hydrogen production from photodegradation of polypropylene plastic wastes

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 81, P. 411 - 417

Published: July 24, 2024

Language: Английский

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Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

EES Catalysis, Journal Year: 2023, Volume and Issue: 2(1), P. 231 - 252

Published: Nov. 7, 2023

This review presents the important progress of Cu-based catalysts for NH 3 -SCR reaction. Special attention is given to elucidating design high-performance catalysts, as well anti-inactivation measures in industrial applications.

Language: Английский

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Polyoxymethylene Upcycling into Methanol and Methyl Groups Catalyzed by a Manganese Pincer Complex

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(31), P. 22017 - 22026

Published: July 24, 2024

Polyoxymethylene (POM) is a commonly used engineering thermoplastic, but its recycling by conventional means, i.e., mechanical recycling, not practiced to any meaningful extent, due technical limitations. Instead, waste POM typically incinerated or disposed in landfills, where it becomes persistent environmental pollutant. An attractive alternative upcycling, namely, the conversion of into value-added chemicals, this has received very little attention. Herein, we report upcycling useful chemicals through three different reactions, all which are efficiently catalyzed single pincer complex earth-abundant manganese. One method involves hydrogenation methanol using H

Language: Английский

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