Inhomogeneities in the Catholyte Channel Limit the Upscaling of CO Flow Electrolysers.

The use of gas diffusion electrodes that supply gaseous CO directly to the catalyst layer has greatly improved the performance of electrochemical CO conversion. However, reports of high current densities and Faradaic efficiencies primarily come from small lab scale electrolysers. Such electrolysers typically have a geometric area of 5 cm, while an industrial electrolyser would require an area closer to 1 m.