Our group analyzes the electrolysis voltage distribution across solid oxide electrolysis cells (SOECs) during CO2 electrolysis and builds  a one-dimensional electrochemical reaction model based on the working principle of SOECs,  identifies the decisive role of Nernst voltage (EN) in controlling these reactions in SOECs, which could be altered by applied electrolysis voltage (Eappl) to avoid detrimental reactions. Further, the effect of other external operation conditions, such as temperature, oxygen partial pressure at anode side, total gas pressure in cathode champer and vapor pressure in the cathode feeding gas, on the “safe” EN window boundary are analyzed and discussed thermodynamically. The related results provide instructional insight for deep understanding of working principle, structural design and operational condition optimization of SOECs. This work has been published on 《Applied Catalysis B: Environmental》.

The article links:https://www.sciencedirect.com/science/article/pii/S0926337322011808?via%3Dihub