Selective electro-reforming of waste polyethylene terephthalate-derived ethylene glycol into C2 chemicals with long-term stability†

IF 9.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2023-01-01 DOI:10.1039/d3gc01486j

Yuxiang Wang , Kesheng Liu , Fulai Liu , Chuxuan Liu , Rui Shi , Yong Chen

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引用次数: 1

Abstract

Electro-oxidation of ethylene glycol (EG) derived from polyethylene terephthalate (PET) into value-added C₂ products is essential for the electro-reforming of waste PET. However, achieving high selectivity and stability in the EG oxidation reaction (EGOR) remains a significant challenge. Herein, we successfully fabricated segregation-less Pd₁Ag₁ alloy nanoparticles (NPs) that can be used for the electro-reforming of waste PET into glycolate C₂ products with high selectivity (97%) and long-term stability (>500 h). Electrochemical measurements and in situ Fourier-transform infrared spectroscopy (FTIR) results reveal that the addition of Ag atoms improves glycolate selectivity by reducing its adsorption on Pd active sites. In addition, the surface *OH species generated on Ag sites facilitate the rapid oxidation of toxic carbonyl species, thereby improving the stability of Pd sites. Therefore, the synergistic effects of Pd₁Ag₁ NPs provide an effective way for practical electro-reforming of real-world waste PET into value-added products with high selectivity and stability.

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选择性电重整废聚对苯二甲酸乙酯衍生乙二醇制备长期稳定的C2化学品†

将聚对苯二甲酸乙二醇酯(PET)衍生的乙二醇(EG)电氧化为高附加值的C2产品是废PET电重整的关键。然而，在EG氧化反应(EGOR)中实现高选择性和高稳定性仍然是一个重大挑战。本文中，我们成功制备了无分离的Pd1Ag1合金纳米颗粒(NPs)，该纳米颗粒可用于将废PET电转化为乙醇酸C2产品，具有高选择性(97%)和长期稳定性(>500 h)。电化学测量和原位傅里叶变换红外光谱(FTIR)结果表明，Ag原子的加入通过减少其在Pd活性位点上的吸附来提高乙醇酸的选择性。此外，在Ag位点上生成的表面*OH促进了有毒羰基的快速氧化，从而提高了Pd位点的稳定性。因此，Pd1Ag1 NPs的协同效应为现实世界中废弃PET的实际电转化转化为高选择性和高稳定性的增值产品提供了有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.