基于其特殊结构，木质素被认为是一种可用于制备高附加值酚类和芳烃类化工产品的天然可再生生物质资源。因此，其解聚方面的研究已成为当前科学前沿热点之一。本项目针对现行化学催化转化技术存在的反应条件苛刻、产物选择性不高等关键问题，结合电化学氧化所需反应条件温和、无需额外添加化学氧化剂、反应过程可控等优点，提出通过设计和制备高性能氧化工作电极，在深入研究工作电极对木质素主要结构和化学键催化氧化性能与作用机制的基础上，综合电化学氧化反应过程因素协同作用，并构建原位示踪技术，用于考察化学键断键及其导致的结构变化过程，以此建立电极催化活性、反应过程因素与氧化过程产物三者间的相互关联，进而对木质素电化学氧化解聚反应过程机理进行阐释，并根据反应过程机理及作用机制，有望实现高效木质素选择性氧化解聚的目的，为电极设计和优化、以及过程因素调控提供更进一步的指导和支持。

Due to the specifically promising structures, lignin is known as a natural renewable biomass resource to produce a series of highly value-added chemical products, such as phenolic compounds and aromatic hydrocarbons, by depolymerization. This property makes the studies of lignin depolymerization become to one of spotlights in current advanced scientific research. By contrast with other depolymerization methods and techniques for lignin, where they usually require rigid reaction conditions with low selectivity for depolymerized products, electrochemical oxidation is performed under mild conditions, without use of chemical oxidants and with controllable reaction processes and considered as an environment friendly, sustainable, and efficient method. In this project, we will initially develop highly efficient working electrodes for lignin oxidation and then deeply investigate the relationship between oxidation abilities of working electrodes and major chemical bonding modes contained in lignin in details. Combining these electrochemical fundamental results with the effects of reaction process factors, the lignin structural conversion during electrochemical oxidation will be further clarified by the developed in-situ monitoring. By summarizing the correlation among electrodes, reaction process factors and depolymerized products, the reaction mechanism of lignin electrochemical depolymerization will be clearly explained and fully understood in details. As the consequence, a system for highly efficient and selective conversion of lignin will be established basing on an electrochemically oxidative depolymerization process and it will also be useful to provide instructively technical guidance and theoretical reference for the rational design of working electrodes and reaction processes during selective lignin depolymerization.