Electrochemical conversion of CO 2 over microchanneled cathode supports of solid oxide electrolysis cells

Abstract This study has demonstrated that microchanneled cathode supports of solid oxide electrolysis cells were developed to improve CO 2 electrolysis performance. Through numerous channels embedded within the support, gas species can diffuse quickly to/from the reaction zone near the cathode/electrolyte interface, and efficient catalyst delivery to the reaction zone can also be achieved. The effect of channel size on CO 2 electrolysis was investigated, and the smaller channel size results in the faster gas diffusion and the lower cell resistance. Therefore, this study reports a new strategy to improve CO 2 electrolysis performance via refining the microchannel structure during a mesh-templating phase-inversion process.