NASA's In Situ Resource Utilization (ISRU) initiatives aim at processing resources on the moon or Mars including processing carbon dioxide to oxygen for use as a propellant and for life support. The electrochemical reduction of carbon dioxide in an ionic liquid imbibed membrane cell has been studied that produces separate streams of carbon monoxide and oxygen. A number of different anion/cation ionic liquid pairs were examined in a Pt-catalyzed ionic liquid-imbibed membrane. Cyclic voltammetric measurements show an increase in the carbon dioxide reactivity with decreasing anion size for aprotic ionic liquids. Gas chromatography analysis shows carbon monoxide being generated on the cathode while oxygen is produced on the anode. Coupled with developing ionic liquid imbibed membranes, an investigation was also made into the reaction behavior of carbon dioxide in the ionic liquid media, whether it be the dissolution of carbon dioxide in the ionic liquid, followed by its diffusion to a reaction site, the charge-transfer kinetics at the electrode surface, or the gas-solid phase reduction of carbon dioxide at the triple point boundary of the gas phase, electrode, and ionic liquid. Electrolessly and electrolytically deposited catalysts on the membrane separator were examined that shows higher reduction rates when the carbon dioxide is not hindered by its dissolution and diffusion in the ionic liquid electrolyte.