Synergistic Catalysis for Recycling and Upcycling of Plastics

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2025-05-07 DOI:10.1021/acscatal.5c00984

Hongshun Ran, Xinyang Sun, Mengying Zheng, Yaxuan Jing

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Abstract

The management of waste plastics is a critical challenge due to their chemical stability, high production volume, low economic value, and short lifespan. Currently, only a small fraction of plastic waste is mechanically recycled, while most are incinerated, landfilled, or released into the environment, exacerbating pollution. Given their potential as energy-rich carbon resources, chemical valorization has gained increasing attention. A key challenge in plastic chemical recycling lies in the selective activation and cleavage of C–C, C–O, C–N, and C–Cl bonds within polymeric macromolecules. The whole cleavage process involving substrate adsorption, H₂/O₂ dissociation, bond activation-cleavage, intermediate saturation and product desorption usually requires synergistic catalysis between two or more different active sites. Understanding these cooperative catalytic mechanisms is crucial for optimizing catalyst design and reaction pathways. It integrates insights from molecular-level catalysis, active site engineering, and mechanistic studies of tandem catalysis systems, providing a comprehensive understanding of reaction networks and pathways that enable precise bond activation and cleavage using multifunctional catalysts.

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塑料回收和升级利用的协同催化

由于废塑料的化学稳定性、高产量、低经济价值和短寿命，废塑料的管理是一个关键的挑战。目前，只有一小部分塑料垃圾被机械回收，而大多数塑料垃圾被焚烧、填埋或排放到环境中，加剧了污染。由于其作为能源丰富的碳资源的潜力，化学增值越来越受到关注。塑料化学回收的一个关键挑战在于聚合物大分子中C-C、C-O、C-N和C-Cl键的选择性激活和裂解。整个裂解过程包括底物吸附、H2/O2解离、键活化-裂解、中间饱和和产物脱附，通常需要两个或多个不同活性位点之间的协同催化。了解这些协同催化机制对于优化催化剂设计和反应途径至关重要。它整合了分子水平催化，活性位点工程和串联催化系统机理研究的见解，提供了对反应网络和途径的全面理解，从而能够使用多功能催化剂进行精确的键激活和裂解。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.