近年来，电催化二氧化碳还原以其高效、清洁的特性被广泛认为具有潜在的工业应用前景。然而，该技术目前还无法很好的控制高级产物合成，尤其是多碳产物。该问题的关键是对于生成多碳产物的基础机理研究的缺失，导致催化剂的合成和分析目前仍主要依赖经验学，缺少理论指导来进一步优化催化剂的选择性催化。申请人拟通过高时空分辨率的原位光谱和电化学联用表征手段的建立，以Cu催化二氧化碳还原为体系，同时探究反应动力学（电子转移过程）以及确认催化剂表面中间体及其吸脱附行为，通过两种分析测试手段相辅相成，据此推测合理可信的具体催化反应路径，进一步建立Cu基催化剂表面结构组成与性能的构效关系。最后，在对机理研究和材料组分分析的基础上，探究催化剂表面结构组成与催化选择性之间的关系，进一步优化Cu基催化剂，设计针对多碳产物高选择性的Cu基催化剂，也能进一步促进电分析化学以及原位技术的进步。

Electrochemical reduction of carbon dioxide is regarded as a promising technique with great application prospect due to its high efficiency and renewable feature. However, the product selectivity, especially the selectivity of C2+ products, is still below the requirement of industrial applications. One of the key reasons is the lack of fundamental mechanistic study of the formation of C2+ products, which leads to the difficulty of rational design of catalysts. The current design strategies of catalysts towards specific products mainly reply on empiricism not on reaction mechanism. Aiming at the understanding of the complex mechanism towards C2+ product formation, this project plans to using both in situ spectroscopic (IR/SPRi) and electrochemical (FTACV) techniques to study different reaction intermediates and underlying electron transfer processes on Cu catalyzed electrochemical carbon dioxide reduction reaction and aims to provide guidelines to the synthesis of future catalysts and the development of electroanalytical chemistry.