The analytical tools to quantify CO₂RR products are often slow and have high limits of detection. As a result, researchers are forced to extend the duration of their experiments to accumulate sufficient product and surpass these detection limits. This slows down research considerably, and the research scope often remains limited. To help speed up CO₂RR catalyst studies, we have developed a new differential electrochemical mass spectrometer (DEMS) setup and cell design that enables the quantification of major gaseous and liquid products significantly faster than conventional analytical techniques. Special attention was given to the hydrodynamics of the cell to avoid mass transfer limitations and the calibration of the setup to accurately quantify the major CO₂ reduction products. As proof of concept of the methodology, the products formed during CO₂RR on a polycrystalline Ag and Cu electrode in a 0.1-M KHCO₃ electrolyte at different potentials were measured and quantified.

量化 CO ₂ RR 产物的分析工具通常速度较慢且检测限较高。因此，研究人员被迫延长实验持续时间，以积累足够的产物并超越这些检测极限。这大大减慢了研究速度，而且研究范围往往仍然有限。为了帮助加快 CO ₂ RR 催化剂研究，我们开发了一种新型差示电化学质谱仪 (DEMS) 设置和池设计，能够比传统分析技术更快地定量主要气体和液体产物。我们特别关注电池的流体动力学以避免传质限制以及校准装置以准确量化主要的 CO ₂还原产物。作为该方法的概念证明，对在不同电位下的 0.1-M KHCO ₃电解质中的多晶 Ag 和 Cu 电极上CO ₂ RR过程中形成的产物进行了测量和量化。