In-Situ Analysis of Co-Electrolysis Species Via Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS)
The EPSRC funded research programme, 4CU aims to enhance the fundamental understanding of CO2 and its role in co-electrolysis by developing a suite of in-situ investigative methods for high temperature SOC operation. Using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) we can monitor both adsorbed and gas phase species in-situ. Variation of potential and temperature conditions allow for visualization of surface mechanisms associated with single atmosphere fuel cell operation. This, along with dual atmosphere measurements, will be discussed. This work illustrates the applicability of the new technique for SOCs operated in a range of atmospheres using Au, Pt and Ag electrodes. The comparison of potential dependent DRIFTS combined with electrochemical measurements provides an important insight into the roles of oxygen ion and proton transport within the systems studied.