近年来，高温熔盐捕集CO2电化学转化制备碳纳米管和石墨烯等高附加值碳材料，已成为CO2减排和资源化利用领域的研究热点。但现有研究仍然存在诸多问题，首先未阐明多因素条件下CO32-在阴极的还原机理和动力学，其次阴极产物形貌与电解条件的协同调控机制不明晰且产物纯度较低。针对上述问题，本项目拟首先在含氧氯化物熔体中，采用自制耐腐蚀惰性阳极，以石墨为工作电极，Ag/AgCl为参比电极，通过循环/方波伏安法结合气相质谱等分析方法研究多因素条件下CO32-的阴极还原动力学，并通过高斯拟合解析阴极还原机理；其次，采用原位分析结合高分辨表征技术，研究不同电解条件下阴极产物形核和生长的协同调控机理；最后，通过优化电解条件，实现高纯度和高附加值碳产物的可控制备。项目研究成果可期望与可再生能源（如太阳能）利用相结合，从而为CO2的减排及其向高附加值碳资源的转化与综合利用提供新途径。

Recently, the capture and electrochemical conversion of CO2 by molten salt electrolysis into value-added materilais, such as carbon nanotube and graphene, has became a hot research spot in the area of reduction and comprehensive utilization of CO2. However, the cathodic reduction mechanism of CO2 in molten salt is still not clear, and the relationship between morphologies and electrolytic conditions is also confusing. Moreover, the cathodic product is still of poor quality. In this paper, cyclic voltammogram and square wave voltammetry together with gas mass spectrometry will be employed to investigate the cathodic reduction kinetics of CO32- in molten CaCl2 first, using the as-prepared inert anode, graphite as the cathode and Ag/AgCl as the reference electrode. And the cathodic reduction mechanism will be further clarified by processing data with gaussian fitting. Secondly, the nucleation and growth mechanism of the carbon at the cathode under different electrolytic conditions will also be investigated in situ by high resolution characterization techniques. At last, the successful capture and electrochemical conversion of CO2 into desired pure and value-added carbonaceous materials will be realized, by optimizing the electrolytic condition, and clarifying the cooperative regulation mechanism of the nucleation and growth of carbon at the cathode. The obtained results can be applied with renewable energy such as solar energy, which will offer a new approach for CO2 emission reduction, its conversion into value-added materials and comprehensive utilization of CO2.