中国科学院上海硅酸盐研究所施剑林报道了PBS废塑料和马来酸的无膜电催化共转化制备高纯度琥珀酸固体。相关研究成果于2024年7月27日发表在《德国应用化学》。

塑料污染是一个日益严重的全球问题，可以通过塑料的全生命周期管理来解决，包括塑料回收作为最有前景的方法之一。系统设计、催化剂开发和产品分离是提高电催化塑料回收经济性的关键。

该文首次设计了一种无膜共生产系统，通过聚丁二酸丁二醇酯（PBS）废塑料和生物质衍生马来酸（MA）的共电解，分别在阳极和阴极生产琥珀酸（SA）。为此，合成了具有显著增强1,4-丁二醇（BDO）氧化反应（BOR）活性的Cr³⁺-Ni（OH）₂电催化剂，并揭示了掺杂Cr作为“电子牵引器”的作用，以加速Ni²⁺/Ni³⁺循环中的速率决定步骤（RDS）。

令人印象深刻的是，已经获得了3.02 g h^-1的超高SA生产率和对SA的超高表观法拉第效率（FEapparent=181.5%）。已经开发了一种二氧化碳辅助的顺序沉淀方法来生产高纯度SA和副产品NaHCO₃固体。初步的技术经济分析表明，所报告的系统具有很大的经济效益，在未来的工业应用中前景广阔。

附：英文原文

Title: Membrane-Free Electrocatalytic Co-Conversions of PBS Waste Plastics and Maleic Acid into High-Purity Succinic Acid Solid

Author: Bo Zhou, Kai Shi, Xue Teng, Zhenhua Li, Lisong Chen, Jianlin Shi

Issue&Volume: 2024-07-27

Abstract: Plastic pollution, an increasingly serious global problem, can be addressed through the full lifecycle management of plastics, including plastics recycling as one of the most promising approaches. System design, catalyst development, and product separation are the keys in improving the economics of electrocatalytic plastics recycling. Here, a membrane-free co-production system was devised to produce succinic acid (SA) at both anode and cathode respectively by the co-electrolysis of polybutylene succinate (PBS) waste plastics and biomass-derived maleic acid (MA) for the first time. To this end, Cr3+-Ni(OH)2 electrocatalyst featuring much enhanced 1,4-butanediol (BDO) oxidation reaction (BOR) activity has been synthesized and the role of doped Cr has been revealed as an “electron puller” to accelerate the rate-determining step (RDS) in the Ni2+/Ni3+ cycling. Impressively, an extra-high SA production rate of 3.02 g h-1 and ultra-high apparent Faraday efficiency towards SA (FEapparent=181.5%) have been obtained. A carbon dioxide-assisted sequential precipitation approach has been developed to produce high-purity SA and byproduct NaHCO3 solids. Preliminary techno-economic analysis demonstrates that the reported system is economically profitable and promising for future industrial applications.

DOI: 10.1002/anie.202411502

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202411502