@article{Zhu2026, 
author = {Xi Zhu and Lingwei Hu and Xingqun Zheng and Qingmei Wang and Jitao Li and Dan Liu and Weiwei Lei and Yi Zeng and Qingsong Hua and Shun Lu},
title = {Electrochemical upcycling of polyethylene terephthalate: catalyst design, reaction mechanisms, and integrated paired electrolysis},
year = {2026},
journal = {Industrial Chemistry & Materials},
volume = {4},
number = {6},
pages = {737-777},
keywords = {Electrochemical upcycling, Polyethylene terephthalate, Ethylene glycol oxidation, Paired electrolysis, Formic acid},
url = {https://www.sciopen.com/article/10.1039/d6im00018e},
doi = {10.1039/d6im00018e},
abstract = {Polyethylene terephthalate (PET) waste has become a persistent global environmental challenge. Electrochemical PET upcycling has recently emerged as a promising strategy. This review provides a comprehensive overview of the reaction pathways, catalyst design principles, and integrated paired-electrolysis strategies for the ethylene glycol oxidation reaction (EGOR). The EGOR proceeds through C1 (formic acid, FA) and C2 (glycolic acid, GA) oxidation pathways, with product selectivity governed by several key factors including the catalyst, applied potential and electrolyte conditions. The catalysts for the EGOR focus on noble metals, transition-metal compounds, metal–organic frameworks, organic catalysts, and heterojunction architectures. Besides the anodic EGOR, energy-efficient paired electrolysis systems coupling the EGOR with cathodic reactions, such as hydrogen evolution, two-electron oxygen reduction to H2O2, CO2 reduction, and nitrate reduction, are highlighted for their ability to lower cell voltage and enable the coproduction of value-added chemicals. Mechanistic insights derived from spectroscopy characterization and theoretical calculations are critically examined to elucidate active-site evolution, intermediate stabilization, and reaction-depth control. Finally, key challenges and future opportunities are identified, including selectivity control at industrial current densities, impurity tolerance, product separation, and standardized testing protocols. This review aims to provide a mechanistic and system-level framework to guide the rational design of selective, energy-efficient, and scalable electrochemical PET upcycling technologies.}
}